bump version to 10.1.2

Move explanation on single unnamed parameters to the error details

CHANGELOG.md

@@ -3,7 +3,19 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
-## Unreleased
+## [10.1.2] - 2023-02-01
+
+### Fixed
+
+ - #2565, Fix bad M2M embedding on RPC - @steve-chavez
+ - #2575, Replace misleading error message when no function is found with a hint containing functions/parameters names suggestions - @laurenceisla
+ - #2582, Move explanation about "single parameters" from the `message` to the `details` in the error output - @laurenceisla
+ - #2569, Replace misleading error message when no relationship is found with a hint containing parent/child names suggestions - @laurenceisla
+ - #1405, Add the required OpenAPI items object when the parameter is an array - @laurenceisla
+ - #2592, Add upsert headers for POST requests to the OpenAPI output - @laurenceisla
+ - #2623, Fix FK pointing to VIEW instead of TABLE in OpenAPI output - @laurenceisla
+ - #2622, Consider any PostgreSQL authentication failure as fatal and exit immediately - @michivi
+ - #2620, Fix `NOTIFY pgrst` not reloading the db connections catalog cache - @steve-chavez
 
 ## [10.1.1] - 2022-11-08
 

nix/tools/withTools.nix

@@ -54,6 +54,10 @@ let
         export PGDATABASE
         export PGRST_DB_SCHEMAS
 
+        HBA_FILE="$tmpdir/pg_hba.conf"
+        echo "local $PGDATABASE some_protected_user password" > "$HBA_FILE"
+        echo "local $PGDATABASE all trust" >> "$HBA_FILE"
+
         log "Initializing database cluster..."
         # We try to make the database cluster as independent as possible from the host
         # by specifying the timezone, locale and encoding.
@@ -62,7 +66,7 @@ let
 
         log "Starting the database cluster..."
         # Instead of listening on a local port, we will listen on a unix domain socket.
-        pg_ctl -l "$tmpdir/db.log" -w start -o "-F -c listen_addresses=\"\" -k $PGHOST -c log_statement=\"all\"" \
+        pg_ctl -l "$tmpdir/db.log" -w start -o "-F -c listen_addresses=\"\" -c hba_file=$HBA_FILE -k $PGHOST -c log_statement=\"all\"" \
           >> "$setuplog"
 
         stop () {

postgrest.cabal

@@ -1,5 +1,5 @@
 name:               postgrest
-version:            10.1.1
+version:            10.1.2
 synopsis:           REST API for any Postgres database
 description:        Reads the schema of a PostgreSQL database and creates RESTful routes
                     for tables, views, and functions, supporting all HTTP methods that security
@@ -85,6 +85,7 @@ library
                     , contravariant-extras      >= 0.3.3 && < 0.4
                     , cookie                    >= 0.4.2 && < 0.5
                     , either                    >= 4.4.1 && < 5.1
+                    , fuzzyset                  >= 0.2.3
                     , gitrev                    >= 1.2 && < 1.4
                     , hasql                     >= 1.6.1.1 && < 1.7
                     , hasql-dynamic-statements  >= 0.3.1 && < 0.4

src/PostgREST/ApiRequest.hs

@@ -453,7 +453,7 @@ requestMediaTypes conf action path =
 findProc :: QualifiedIdentifier -> S.Set Text -> Bool -> ProcsMap -> MediaType -> Bool -> Either ApiRequestError ProcDescription
 findProc qi argumentsKeys paramsAsSingleObject allProcs contentMediaType isInvPost =
   case matchProc of
-    ([], [])     -> Left $ NoRpc (qiSchema qi) (qiName qi) (S.toList argumentsKeys) paramsAsSingleObject contentMediaType isInvPost
+    ([], [])     -> Left $ NoRpc (qiSchema qi) (qiName qi) (S.toList argumentsKeys) paramsAsSingleObject contentMediaType isInvPost (HM.keys allProcs) lookupProcName
     -- If there are no functions with named arguments, fallback to the single unnamed argument function
     ([], [proc]) -> Right proc
     ([], procs)  -> Left $ AmbiguousRpc (toList procs)
@@ -461,7 +461,9 @@ findProc qi argumentsKeys paramsAsSingleObject allProcs contentMediaType isInvPo
     ([proc], _)  -> Right proc
     (procs, _)   -> Left $ AmbiguousRpc (toList procs)
   where
-    matchProc = overloadedProcPartition $ HM.lookupDefault mempty qi allProcs -- first find the proc by name
+    matchProc = overloadedProcPartition lookupProcName
+    -- First find the proc by name
+    lookupProcName = HM.lookupDefault mempty qi allProcs
     -- The partition obtained has the form (overloadedProcs,fallbackProcs)
     -- where fallbackProcs are functions with a single unnamed parameter
     overloadedProcPartition = foldr select ([],[])

src/PostgREST/ApiRequest/Types.hs

@@ -32,9 +32,11 @@ module PostgREST.ApiRequest.Types
   ) where
 
 import PostgREST.MediaType                (MediaType (..))
-import PostgREST.SchemaCache.Identifiers  (FieldName)
+import PostgREST.SchemaCache.Identifiers  (FieldName,
+                                           QualifiedIdentifier)
 import PostgREST.SchemaCache.Proc         (ProcDescription (..))
-import PostgREST.SchemaCache.Relationship (Relationship)
+import PostgREST.SchemaCache.Relationship (Relationship,
+                                           RelationshipsMap)
 
 import Protolude
 
@@ -64,8 +66,8 @@ data ApiRequestError
   | InvalidRpcMethod ByteString
   | LimitNoOrderError
   | NotFound
-  | NoRelBetween Text Text Text
-  | NoRpc Text Text [Text] Bool MediaType Bool
+  | NoRelBetween Text Text (Maybe Text) Text RelationshipsMap
+  | NoRpc Text Text [Text] Bool MediaType Bool [QualifiedIdentifier] [ProcDescription]
   | NotEmbedded Text
   | ParseRequestError Text Text
   | PutRangeNotAllowedError

src/PostgREST/Error.hs

@@ -17,6 +17,8 @@ module PostgREST.Error
 
 import qualified Data.Aeson                as JSON
 import qualified Data.ByteString.Char8     as BS
+import qualified Data.FuzzySet             as Fuzzy
+import qualified Data.HashMap.Strict       as HM
 import qualified Data.Text                 as T
 import qualified Data.Text.Encoding        as T
 import qualified Data.Text.Encoding.Error  as T
@@ -35,12 +37,14 @@ import           PostgREST.ApiRequest.Types (ApiRequestError (..),
 import           PostgREST.MediaType        (MediaType (..))
 import qualified PostgREST.MediaType        as MediaType
 
-import PostgREST.SchemaCache.Identifiers  (QualifiedIdentifier (..))
+import PostgREST.SchemaCache.Identifiers  (QualifiedIdentifier (..),
+                                           Schema)
 import PostgREST.SchemaCache.Proc         (ProcDescription (..),
                                            ProcParam (..))
 import PostgREST.SchemaCache.Relationship (Cardinality (..),
                                            Junction (..),
-                                           Relationship (..))
+                                           Relationship (..),
+                                           RelationshipsMap)
 import Protolude
 
 
@@ -151,36 +155,143 @@ instance JSON.ToJSON ApiRequestError where
     "details" .= JSON.Null,
     "hint"    .= JSON.Null]
 
-  toJSON (NoRelBetween parent child schema) = JSON.object [
+  toJSON (NoRelBetween parent child embedHint schema allRels) = JSON.object [
     "code"    .= SchemaCacheErrorCode00,
     "message" .= ("Could not find a relationship between '" <> parent <> "' and '" <> child <> "' in the schema cache" :: Text),
-    "details" .= JSON.Null,
-    "hint"    .= ("Verify that '" <> parent <> "' and '" <> child <> "' exist in the schema '" <> schema <> "' and that there is a foreign key relationship between them. If a new relationship was created, try reloading the schema cache." :: Text)]
+    "details" .= ("Searched for a foreign key relationship between '" <> parent <> "' and '" <> child <> maybe mempty ("' using the hint '" <>) embedHint <> "' in the schema '" <> schema <> "', but no matches were found."),
+    "hint"    .= noRelBetweenHint parent child schema allRels]
+
   toJSON (AmbiguousRelBetween parent child rels) = JSON.object [
     "code"    .= SchemaCacheErrorCode01,
     "message" .= ("Could not embed because more than one relationship was found for '" <> parent <> "' and '" <> child <> "'" :: Text),
     "details" .= (compressedRel <$> rels),
     "hint"    .= ("Try changing '" <> child <> "' to one of the following: " <> relHint rels <> ". Find the desired relationship in the 'details' key." :: Text)]
-  toJSON (NoRpc schema procName argumentKeys hasPreferSingleObject contentType isInvPost)  =
-    let prms = "(" <> T.intercalate ", " argumentKeys <> ")" in JSON.object [
+  toJSON (NoRpc schema procName argumentKeys hasPreferSingleObject contentType isInvPost allProcs overloadedProcs)  =
+    let func = schema <> "." <> procName
+        prms = T.intercalate ", " argumentKeys
+        prmsMsg = "(" <> prms <> ")"
+        prmsDet = " with parameter" <> (if length argumentKeys > 1 then "s " else " ") <> prms
+        fmtPrms p = if null argumentKeys then " without parameters" else p
+        onlySingleParams = hasPreferSingleObject || (isInvPost && contentType `elem` [MTTextPlain, MTTextXML, MTOctetStream])
+    in JSON.object [
     "code"    .= SchemaCacheErrorCode02,
-    "message" .= ("Could not find the " <> schema <> "." <> procName <>
+    "message" .= ("Could not find the function " <> func <> (if onlySingleParams then "" else fmtPrms prmsMsg) <> " in the schema cache"),
+    "details" .= ("Searched for the function " <> func <>
       (case (hasPreferSingleObject, isInvPost, contentType) of
-        (True, _, _)                 -> " function with a single json or jsonb parameter"
-        (_, True, MTTextPlain)       -> " function with a single unnamed text parameter"
-        (_, True, MTTextXML)         -> " function with a single unnamed xml parameter"
-        (_, True, MTOctetStream)     -> " function with a single unnamed bytea parameter"
-        (_, True, MTApplicationJSON) -> prms <> " function or the " <> schema <> "." <> procName <>" function with a single unnamed json or jsonb parameter"
-        _                            -> prms <> " function") <>
-      " in the schema cache"),
-    "details" .= JSON.Null,
-    "hint"    .= ("If a new function was created in the database with this name and parameters, try reloading the schema cache." :: Text)]
+        (True, _, _)                 -> " with a single json/jsonb parameter"
+        (_, True, MTTextPlain)       -> " with a single unnamed text parameter"
+        (_, True, MTTextXML)         -> " with a single unnamed xml parameter"
+        (_, True, MTOctetStream)     -> " with a single unnamed bytea parameter"
+        (_, True, MTApplicationJSON) -> fmtPrms prmsDet <> " or with a single unnamed json/jsonb parameter"
+        _                            -> fmtPrms prmsDet) <>
+      ", but no matches were found in the schema cache."),
+    -- The hint will be null in the case of single unnamed parameter functions
+    "hint"    .= if onlySingleParams
+                 then Nothing
+                 else noRpcHint schema procName argumentKeys allProcs overloadedProcs ]
   toJSON (AmbiguousRpc procs)  = JSON.object [
     "code"    .= SchemaCacheErrorCode03,
     "message" .= ("Could not choose the best candidate function between: " <> T.intercalate ", " [pdSchema p <> "." <> pdName p <> "(" <> T.intercalate ", " [ppName a <> " => " <> ppType a | a <- pdParams p] <> ")" | p <- procs]),
     "details" .= JSON.Null,
     "hint"    .= ("Try renaming the parameters or the function itself in the database so function overloading can be resolved" :: Text)]
 
+-- |
+-- If no relationship is found then:
+--
+-- Looks for parent suggestions if parent not found
+-- Looks for child suggestions if parent is found but child is not
+-- Gives no suggestions if both are found (it means that there is a problem with the embed hint)
+--
+-- >>> :set -Wno-missing-fields
+-- >>> let qi t = QualifiedIdentifier "api" t
+-- >>> let rel ft = Relationship{relForeignTable = qi ft}
+-- >>> let rels = HM.fromList [((qi "films", "api"), [rel "directors", rel "roles", rel "actors"])]
+--
+-- >>> noRelBetweenHint "film" "directors" "api" rels
+-- Just "Perhaps you meant 'films' instead of 'film'."
+--
+-- >>> noRelBetweenHint "films" "role" "api" rels
+-- Just "Perhaps you meant 'roles' instead of 'role'."
+--
+-- >>> noRelBetweenHint "films" "role" "api" rels
+-- Just "Perhaps you meant 'roles' instead of 'role'."
+--
+-- >>> noRelBetweenHint "films" "actors" "api" rels
+-- Nothing
+--
+-- >>> noRelBetweenHint "noclosealternative" "roles" "api" rels
+-- Nothing
+--
+-- >>> noRelBetweenHint "films" "noclosealternative" "api" rels
+-- Nothing
+--
+-- >>> noRelBetweenHint "films" "noclosealternative" "noclosealternative" rels
+-- Nothing
+--
+noRelBetweenHint :: Text -> Text -> Schema -> RelationshipsMap -> Maybe Text
+noRelBetweenHint parent child schema allRels = ("Perhaps you meant '" <>) <$>
+  if isJust findParent
+    then (<> "' instead of '" <> child <> "'.") <$> suggestChild
+    else (<> "' instead of '" <> parent <> "'.") <$> suggestParent
+  where
+    findParent = HM.lookup (QualifiedIdentifier schema parent, schema) allRels
+    fuzzySetOfParents  = Fuzzy.fromList [qiName (fst p) | p <- HM.keys allRels, snd p == schema]
+    fuzzySetOfChildren = Fuzzy.fromList [qiName (relForeignTable c) | c <- fromMaybe [] findParent]
+    suggestParent = Fuzzy.getOne fuzzySetOfParents parent
+    -- Do not give suggestion if the child is found in the relations (weight = 1.0)
+    suggestChild  = headMay [snd k | k <- Fuzzy.get fuzzySetOfChildren child, fst k < 1.0]
+
+-- |
+-- If no function is found with the given name, it does a fuzzy search to all the functions
+-- in the same schema and shows the best match as hint.
+--
+-- >>> :set -Wno-missing-fields
+-- >>> let procs = [(QualifiedIdentifier "api" "test"), (QualifiedIdentifier "api" "another"), (QualifiedIdentifier "private" "other")]
+--
+-- >>> noRpcHint "api" "testt" ["val", "param", "name"] procs []
+-- Just "Perhaps you meant to call the function api.test"
+--
+-- >>> noRpcHint "api" "other" [] procs []
+-- Just "Perhaps you meant to call the function api.another"
+--
+-- >>> noRpcHint "api" "noclosealternative" [] procs []
+-- Nothing
+--
+-- If a function is found with the given name, but no params match, then it does a fuzzy search
+-- to all the overloaded functions' params using the form "param1, param2, param3, ..."
+-- and shows the best match as hint.
+--
+-- >>> let procsDesc = [ProcDescription {pdParams = [ProcParam {ppName="val"}, ProcParam {ppName="param"}, ProcParam {ppName="name"}]}, ProcDescription {pdParams = [ProcParam {ppName="id"}, ProcParam {ppName="attr"}]}]
+--
+-- >>> noRpcHint "api" "test" ["vall", "pqaram", "nam"] procs procsDesc
+-- Just "Perhaps you meant to call the function api.test(name, param, val)"
+--
+-- >>> noRpcHint "api" "test" ["val", "param"] procs procsDesc
+-- Just "Perhaps you meant to call the function api.test(name, param, val)"
+--
+-- >>> noRpcHint "api" "test" ["id", "attrs"] procs procsDesc
+-- Just "Perhaps you meant to call the function api.test(attr, id)"
+--
+-- >>> noRpcHint "api" "test" ["id"] procs procsDesc
+-- Just "Perhaps you meant to call the function api.test(attr, id)"
+--
+-- >>> noRpcHint "api" "test" ["noclosealternative"] procs procsDesc
+-- Nothing
+--
+noRpcHint :: Text -> Text -> [Text] -> [QualifiedIdentifier] -> [ProcDescription] -> Maybe Text
+noRpcHint schema procName params allProcs overloadedProcs =
+  fmap (("Perhaps you meant to call the function " <> schema <> ".") <>) possibleProcs
+  where
+    fuzzySetOfProcs  = Fuzzy.fromList [qiName k | k <- allProcs, qiSchema k == schema]
+    fuzzySetOfParams = Fuzzy.fromList $ listToText <$> [[ppName prm | prm <- pdParams ov] | ov <- overloadedProcs]
+    -- Cannot do a fuzzy search like: Fuzzy.getOne [[Text]] [Text], where [[Text]] is the list of params for each
+    -- overloaded function and [Text] the given params. This converts those lists to text to make fuzzy search possible.
+    -- E.g. ["val", "param", "name"] into "(name, param, val)"
+    listToText       = ("(" <>) . (<> ")") . T.intercalate ", " . sort
+    possibleProcs
+      | null overloadedProcs = Fuzzy.getOne fuzzySetOfProcs procName
+      | otherwise            = (procName <>) <$> Fuzzy.getOne fuzzySetOfParams (listToText params)
+
 compressedRel :: Relationship -> JSON.Value
 -- An ambiguousness error cannot happen for computed relationships TODO refactor so this mempty is not needed
 compressedRel ComputedRelationship{} = JSON.object mempty
@@ -193,7 +304,7 @@ compressedRel Relationship{..} =
     : case relCardinality of
         M2M Junction{..} -> [
             "cardinality" .= ("many-to-many" :: Text)
-          , "relationship" .= (qiName junTable <> " using " <> junConstraint1 <> fmtEls (snd <$> junColumns1) <> " and " <> junConstraint2 <> fmtEls (snd <$> junColumns2))
+          , "relationship" .= (qiName junTable <> " using " <> junConstraint1 <> fmtEls (snd <$> junColsSource) <> " and " <> junConstraint2 <> fmtEls (snd <$> junColsTarget))
           ]
         M2O cons relColumns -> [
             "cardinality" .= ("many-to-one" :: Text)
@@ -317,7 +428,7 @@ checkIsFatal :: PgError -> Maybe Text
 checkIsFatal (PgError _ (SQL.ConnectionUsageError e))
   | isAuthFailureMessage = Just $ toS failureMessage
   | otherwise = Nothing
-  where isAuthFailureMessage = "FATAL:  password authentication failed" `isPrefixOf` failureMessage
+  where isAuthFailureMessage = "FATAL:  password authentication failed" `isInfixOf` failureMessage
         failureMessage = BS.unpack $ fromMaybe mempty e
 checkIsFatal (PgError _ (SQL.SessionUsageError (SQL.QueryError _ _ (SQL.ResultError serverError))))
   = case serverError of

src/PostgREST/Plan.hs

@@ -196,7 +196,7 @@ getJoinConditions tblAlias parentAlias Relationship{relTable=qi,relForeignTable=
 findRel :: Schema -> RelationshipsMap -> NodeName -> NodeName -> Maybe Hint -> Either ApiRequestError Relationship
 findRel schema allRels origin target hint =
   case rels of
-    []  -> Left $ NoRelBetween origin target schema
+    []  -> Left $ NoRelBetween origin target hint schema allRels
     [r] -> Right r
     rs  -> Left $ AmbiguousRelBetween origin target rs
   where
@@ -357,7 +357,7 @@ mutatePlan mutation qi ApiRequest{..} sCache readReq = mapLeft ApiRequestError $
     returnings =
       if iPreferRepresentation == None
         then []
-        else returningCols readReq pkCols
+        else inferColsEmbedNeeds readReq pkCols
     pkCols = maybe mempty tablePKCols $ HM.lookup qi $ dbTables sCache
     logic = map snd qsLogic
     rootOrder = maybe [] snd $ find (\(x, _) -> null x) qsOrder
@@ -371,7 +371,7 @@ callPlan proc apiReq readReq = FunctionCall {
 , funCArgs = payRaw <$> iPayload apiReq
 , funCScalar = procReturnsScalar proc
 , funCMultipleCall = iPreferParameters apiReq == Just MultipleObjects
-, funCReturning = returningCols readReq []
+, funCReturning = inferColsEmbedNeeds readReq []
 }
   where
     paramsAsSingleObject = iPreferParameters apiReq == Just SingleObject
@@ -382,14 +382,15 @@ callPlan proc apiReq readReq = FunctionCall {
       prms  -> KeyParams $ specifiedParams prms
     specifiedParams = filter (\x -> ppName x `S.member` iColumns apiReq)
 
-returningCols :: ReadPlanTree -> [FieldName] -> [FieldName]
-returningCols rr@(Node _ forest) pkCols
+-- | Infers the columns needed for an embed to be successful after a mutation or a function call.
+inferColsEmbedNeeds :: ReadPlanTree -> [FieldName] -> [FieldName]
+inferColsEmbedNeeds (Node ReadPlan{select} forest) pkCols
   -- if * is part of the select, we must not add pk or fk columns manually -
   -- otherwise those would be selected and output twice
   | "*" `elem` fldNames = ["*"]
   | otherwise           = returnings
   where
-    fldNames = fstFieldNames rr
+    fldNames = (\((fld, _), _, _) -> fld) <$> select
     -- Without fkCols, when a mutatePlan to
     -- /projects?select=name,clients(name) occurs, the RETURNING SQL part would
     -- be `RETURNING name`(see QueryBuilder).  This would make the embedding
@@ -403,8 +404,8 @@ returningCols rr@(Node _ forest) pkCols
           Just $ fst <$> cols
         Node ReadPlan{relToParent=Just Relationship{relCardinality=O2O _ cols}} _ ->
           Just $ fst <$> cols
-        Node ReadPlan{relToParent=Just Relationship{relCardinality=M2M Junction{junColumns1, junColumns2}}} _ ->
-          Just $ (fst <$> junColumns1) ++ (fst <$> junColumns2)
+        Node ReadPlan{relToParent=Just Relationship{relCardinality=M2M Junction{junColsSource=cols}}} _ ->
+          Just $ fst <$> cols
         Node ReadPlan{relToParent=Just ComputedRelationship{}} _ ->
           Nothing
         Node ReadPlan{relToParent=Nothing} _ ->

src/PostgREST/Plan/ReadPlan.hs

@@ -1,8 +1,6 @@
-{-# LANGUAGE NamedFieldPuns #-}
 module PostgREST.Plan.ReadPlan
   ( ReadPlanTree
   , ReadPlan(..)
-  , fstFieldNames
   , JoinCondition(..)
   ) where
 
@@ -45,8 +43,3 @@ data ReadPlan = ReadPlan
   -- ^ used for aliasing
   }
   deriving (Eq)
-
--- First level FieldNames(e.g get a,b from /table?select=a,b,other(c,d))
-fstFieldNames :: ReadPlanTree -> [FieldName]
-fstFieldNames (Node ReadPlan{select} _) =
-  fst . (\(f, _, _) -> f) <$> select

src/PostgREST/Response/OpenAPI.hs

@@ -66,10 +66,16 @@ toSwaggerType "bigint"            = Just SwaggerInteger
 toSwaggerType "numeric"           = Just SwaggerNumber
 toSwaggerType "real"              = Just SwaggerNumber
 toSwaggerType "double precision"  = Just SwaggerNumber
-toSwaggerType "ARRAY"             = Just SwaggerArray
 toSwaggerType "json"              = Nothing
 toSwaggerType "jsonb"             = Nothing
-toSwaggerType _                   = Just SwaggerString
+toSwaggerType colType             = case T.takeEnd 2 colType of
+  "[]" -> Just SwaggerArray
+  _    -> Just SwaggerString
+
+makeSwaggerItemType :: Maybe (SwaggerType t) -> Text -> Maybe (Referenced Schema)
+makeSwaggerItemType itemType colType = case itemType of
+  Just SwaggerArray -> Just $ Inline (mempty & type_ .~ toSwaggerType (T.dropEnd 2 colType))
+  _                 -> Nothing
 
 parseDefault :: Text -> Text -> Text
 parseDefault colType colDefault =
@@ -97,11 +103,14 @@ makeProperty tbl rels col = (colName col, Inline s)
     fk :: Maybe Text
     fk =
       let
+        searchedRels = fromMaybe mempty $ HM.lookup (QualifiedIdentifier (tableSchema tbl) (tableName tbl), tableSchema tbl) rels
+        -- Sorts the relationship list to get tables first
+        relsSortedByIsView = sortOn relFTableIsView [ r | r@Relationship{} <- searchedRels]
         -- Finds the relationship that has a single column foreign key
         rel = find (\case
           Relationship{relCardinality=(M2O _ relColumns)} -> [colName col] == (fst <$> relColumns)
           _                                               -> False
-          ) $ fromMaybe mempty $ HM.lookup (QualifiedIdentifier (tableSchema tbl) (tableName tbl), tableSchema tbl) rels
+          ) relsSortedByIsView
         fCol = (headMay . (\r -> snd <$> relColumns (relCardinality r)) =<< rel)
         fTbl = qiName . relForeignTable <$> rel
         fTblCol = (,) <$> fTbl <*> fCol
@@ -119,6 +128,7 @@ makeProperty tbl rels col = (colName col, Inline s)
         Just $ T.append (maybe "" (`T.append` "\n\n") $ colDescription col) (T.intercalate "\n" n)
       else
         colDescription col
+    pType = toSwaggerType (colType col)
     s =
       (mempty :: Schema)
         & default_ .~ (JSON.decode . toUtf8Lazy . parseDefault (colType col) =<< colDefault col)
@@ -126,7 +136,8 @@ makeProperty tbl rels col = (colName col, Inline s)
         & enum_ .~ e
         & format ?~ colType col
         & maxLength .~ (fromIntegral <$> colMaxLen col)
-        & type_ .~ toSwaggerType (colType col)
+        & type_ .~ pType
+        & items .~ (SwaggerItemsObject <$> makeSwaggerItemType pType (colType col))
 
 makeProcSchema :: ProcDescription -> Schema
 makeProcSchema pd =
@@ -141,6 +152,7 @@ makeProcProperty (ProcParam n t _ _) = (n, Inline s)
   where
     s = (mempty :: Schema)
           & type_ .~ toSwaggerType t
+          & items .~ (SwaggerItemsObject <$> makeSwaggerItemType (toSwaggerType t) t)
           & format ?~ t
 
 makePreferParam :: [Text] -> Param
@@ -152,7 +164,15 @@ makePreferParam ts =
   & schema .~ ParamOther ((mempty :: ParamOtherSchema)
     & in_ .~ ParamHeader
     & type_ ?~ SwaggerString
-    & enum_ .~ JSON.decode (JSON.encode ts))
+    & enum_ .~ JSON.decode (JSON.encode $ foldl (<>) [] (val <$> ts)))
+  where
+    val :: Text -> [Text]
+    val = \case
+      "count"      -> ["count=none"]
+      "params"     -> ["params=single-object"]
+      "return"     -> ["return=representation", "return=minimal", "return=none"]
+      "resolution" -> ["resolution=ignore-duplicates", "resolution=merge-duplicates"]
+      _            -> []
 
 makeProcParam :: ProcDescription -> [Referenced Param]
 makeProcParam pd =
@@ -165,9 +185,11 @@ makeProcParam pd =
 
 makeParamDefs :: [Table] -> [(Text, Param)]
 makeParamDefs ti =
-  [ ("preferParams", makePreferParam ["params=single-object"])
-  , ("preferReturn", makePreferParam ["return=representation", "return=minimal", "return=none"])
-  , ("preferCount", makePreferParam ["count=none"])
+  -- TODO: create Prefer for each method (GET, PATCH, etc.)
+  [ ("preferParams", makePreferParam ["params"])
+  , ("preferReturn", makePreferParam ["return"])
+  , ("preferCount", makePreferParam ["count"])
+  , ("preferPost", makePreferParam ["return", "resolution"])
   , ("select", (mempty :: Param)
       & name        .~ "select"
       & description ?~ "Filtering Columns"
@@ -267,7 +289,7 @@ makePathItem t = ("/" ++ T.unpack tn, p $ tableInsertable t || tableUpdatable t
         )
       )
     postOp = tOp
-      & parameters .~ fmap ref ["body." <> tn, "select", "preferReturn"]
+      & parameters .~ fmap ref ["body." <> tn, "select", "preferPost"]
       & at 201 ?~ "Created"
     patchOp = tOp
       & parameters .~ fmap ref (rs <> ["body." <> tn, "preferReturn"])

src/PostgREST/SchemaCache.hs

@@ -512,13 +512,11 @@ tablesSqlQuery pgVer =
               CASE
                   WHEN t.typtype = 'd' THEN
                   CASE
-                      WHEN bt.typelem <> 0::oid AND bt.typlen = (-1) THEN 'ARRAY'::text
                       WHEN nbt.nspname = 'pg_catalog'::name THEN format_type(t.typbasetype, NULL::integer)
                       ELSE format_type(a.atttypid, a.atttypmod)
                   END
                   ELSE
                   CASE
-                      WHEN t.typelem <> 0::oid AND t.typlen = (-1) THEN 'ARRAY'::text
                       WHEN nt.nspname = 'pg_catalog'::name THEN format_type(a.atttypid, NULL::integer)
                       ELSE format_type(a.atttypid, a.atttypmod)
                   END

src/PostgREST/SchemaCache/Relationship.hs

@@ -55,8 +55,8 @@ data Junction = Junction
   { junTable       :: QualifiedIdentifier
   , junConstraint1 :: FKConstraint
   , junConstraint2 :: FKConstraint
-  , junColumns1    :: [(FieldName, FieldName)]
-  , junColumns2    :: [(FieldName, FieldName)]
+  , junColsSource  :: [(FieldName, FieldName)]
+  , junColsTarget  :: [(FieldName, FieldName)]
   }
   deriving (Eq, Ord, Generic, JSON.ToJSON)
 

src/PostgREST/Workers.hs

@@ -230,16 +230,15 @@ listener appState = do
       listener appState
 
     handleNotification _ msg
-      | BS.null msg            = scLoader -- reload the schema cache
-      | msg == "reload schema" = scLoader -- reload the schema cache
-      | msg == "reload config" = reReadConfig False appState -- reload the config
+      | BS.null msg            = cacheReloader
+      | msg == "reload schema" = cacheReloader
+      | msg == "reload config" = reReadConfig False appState
       | otherwise              = pure () -- Do nothing if anything else than an empty message is sent
 
-    scLoader =
-      -- It's not necessary to check the loadSchemaCache success
-      -- here. If the connection drops, the thread will die and
-      -- proceed to recover.
-      void $ loadSchemaCache appState
+    cacheReloader =
+      -- reloads the schema cache + restarts pool connections
+      -- it's necessary to restart the pg connections because they cache the pg catalog(see #2620)
+      connectionWorker appState
 
 -- | Re-reads the config plus config options from the db
 reReadConfig :: Bool -> AppState -> IO ()

test/doc/Main.hs

@@ -15,4 +15,5 @@ main =
     , "src/PostgREST/Query/SqlFragment.hs"
     , "src/PostgREST/ApiRequest/Preferences.hs"
     , "src/PostgREST/ApiRequest/QueryParams.hs"
+    , "src/PostgREST/Error.hs"
     ]

test/io/fixtures.sql

@@ -86,3 +86,15 @@ $$ language sql;
 create or replace function hello() returns text as $$
   select 'hello';
 $$ language sql;
+
+create table cats(id uuid primary key, name text);
+grant all on cats to postgrest_test_anonymous;
+
+create function drop_change_cats() returns void
+language sql security definer
+as $$
+  drop table cats;
+  create table cats(id bigint primary key, name text);
+  grant all on table cats to postgrest_test_anonymous;
+  notify pgrst, 'reload schema';
+$$;

test/io/postgrest.py

@@ -50,6 +50,7 @@ def run(
     env=None,
     port=None,
     host=None,
+    wait_for_readiness=True,
     no_pool_connection_available=False,
 ):
     "Run PostgREST and yield an endpoint that is ready for connections."
@@ -88,6 +89,7 @@ def run(
             process.stdin.write(stdin or b"")
             process.stdin.close()
 
+            if wait_for_readiness:
                 wait_until_ready(adminurl + "/ready")
 
             process.stdout.read()
@@ -137,6 +139,14 @@ def freeport():
         return s.getsockname()[1]
 
 
+def wait_until_exit(postgrest):
+    "Wait for PostgREST to exit, or times out"
+    try:
+        return postgrest.process.wait(timeout=1)
+    except (subprocess.TimeoutExpired):
+        raise PostgrestTimedOut()
+
+
 def wait_until_ready(url):
     "Wait for the given HTTP endpoint to return a status of 200."
     session = requests_unixsocket.Session()

test/io/test_io.py

@@ -66,6 +66,15 @@ def test_read_secret_from_stdin_dbconfig(defaultenv):
         assert response.status_code == 200
 
 
+def test_fail_with_invalid_password(defaultenv):
+    "Connecting with an invalid password should fail without retries."
+    uri = f'postgresql://?dbname={defaultenv["PGDATABASE"]}&host={defaultenv["PGHOST"]}&user=some_protected_user&password=invalid_pass'
+    env = {**defaultenv, "PGRST_DB_URI": uri}
+    with run(env=env, wait_for_readiness=False) as postgrest:
+        exitCode = wait_until_exit(postgrest)
+        assert exitCode == 1
+
+
 def test_connect_with_dburi(dburi, defaultenv):
     "Connecting with db-uri instead of LIPQ* environment variables should work."
     defaultenv_without_libpq = {
@@ -325,7 +334,7 @@ def test_db_schema_notify_reload(defaultenv):
             "/rpc/change_db_schema_and_full_reload", data={"schemas": "v1"}
         )
 
-        time.sleep(0.1)
+        time.sleep(0.2)
 
         response = postgrest.session.get("/rpc/get_guc_value?name=search_path")
         assert response.text == '"\\"v1\\", \\"public\\""'
@@ -818,6 +827,27 @@ def test_no_pool_connection_required_on_bad_embedding(defaultenv):
         assert response.status_code == 400
 
 
+def test_notify_reloading_catalog_cache(defaultenv):
+    "notify should reload the connection catalog cache"
+
+    with run(env=defaultenv) as postgrest:
+
+        # first the id col is an uuid
+        response = postgrest.session.get(
+            "/cats?id=eq.dea27321-f988-4a57-93e4-8eeb38f3cf1e"
+        )
+        assert response.status_code == 200
+
+        # change it to a bigint
+        response = postgrest.session.post("/rpc/drop_change_cats")
+        assert response.status_code == 204
+        time.sleep(0.1)
+
+        # next request should succeed with a bigint value
+        response = postgrest.session.get("/cats?id=eq.1")
+        assert response.status_code == 200
+
+
 # TODO: This test fails now because of https://github.com/PostgREST/postgrest/pull/2122
 # The stack size of 1K(-with-rtsopts=-K1K) is not enough and this fails with "stack overflow"
 # A stack size of 200K seems to be enough for succeess

test/spec/Feature/OpenApi/OpenApiSpec.hs

@@ -91,7 +91,7 @@ spec actualPgVersion = describe "OpenAPI" $ do
             [
               { "$ref": "#/parameters/body.child_entities" },
               { "$ref": "#/parameters/select" },
-              { "$ref": "#/parameters/preferReturn" }
+              { "$ref": "#/parameters/preferPost" }
             ]
           |]
 
@@ -310,6 +310,23 @@ spec actualPgVersion = describe "OpenAPI" $ do
             }
           |]
 
+  describe "VIEW created for a TABLE with a O2M relationship" $ do
+
+    it "fk points to destination TABLE instead of the VIEW" $ do
+      r <- simpleBody <$> get "/"
+
+      let referralLink = r ^? key "definitions" . key "projects" . key "properties" . key "client_id"
+
+      liftIO $
+        referralLink `shouldBe` Just
+          [aesonQQ|
+            {
+              "format": "integer",
+              "type": "integer",
+              "description": "Note:\nThis is a Foreign Key to `clients.id`.<fk table='clients' column='id'/>"
+            }
+          |]
+
   describe "PostgreSQL to Swagger Type Mapping" $ do
 
     it "character varying to string" $ do
@@ -490,6 +507,117 @@ spec actualPgVersion = describe "OpenAPI" $ do
             }
           |]
 
+    it "array types to array" $ do
+      r <- simpleBody <$> get "/"
+
+      let text_arr_types = r ^? key "definitions" . key "openapi_types" . key "properties" . key "a_text_arr"
+      let int_arr_types = r ^? key "definitions" . key "openapi_types" . key "properties" . key "a_int_arr"
+      let bool_arr_types = r ^? key "definitions" . key "openapi_types" . key "properties" . key "a_bool_arr"
+      let char_arr_types = r ^? key "definitions" . key "openapi_types" . key "properties" . key "a_char_arr"
+      let varchar_arr_types = r ^? key "definitions" . key "openapi_types" . key "properties" . key "a_varchar_arr"
+      let bigint_arr_types = r ^? key "definitions" . key "openapi_types" . key "properties" . key "a_bigint_arr"
+      let numeric_arr_types = r ^? key "definitions" . key "openapi_types" . key "properties" . key "a_numeric_arr"
+      let json_arr_types = r ^? key "definitions" . key "openapi_types" . key "properties" . key "a_json_arr"
+      let jsonb_arr_types = r ^? key "definitions" . key "openapi_types" . key "properties" . key "a_jsonb_arr"
+
+      liftIO $ do
+
+        text_arr_types `shouldBe` Just
+          [aesonQQ|
+            {
+              "format": "text[]",
+              "type": "array",
+              "items": {
+                "type": "string"
+              }
+            }
+          |]
+
+        int_arr_types `shouldBe` Just
+          [aesonQQ|
+            {
+              "format": "integer[]",
+              "type": "array",
+              "items": {
+                "type": "integer"
+              }
+            }
+          |]
+
+        bool_arr_types `shouldBe` Just
+          [aesonQQ|
+            {
+              "format": "boolean[]",
+              "type": "array",
+              "items": {
+                "type": "boolean"
+              }
+            }
+          |]
+
+        char_arr_types `shouldBe` Just
+          [aesonQQ|
+            {
+              "format": "character[]",
+              "type": "array",
+              "items": {
+                "type": "string"
+              }
+            }
+          |]
+
+        varchar_arr_types `shouldBe` Just
+          [aesonQQ|
+            {
+              "format": "character varying[]",
+              "type": "array",
+              "items": {
+                "type": "string"
+              }
+            }
+          |]
+
+        bigint_arr_types `shouldBe` Just
+          [aesonQQ|
+            {
+              "format": "bigint[]",
+              "type": "array",
+              "items": {
+                "type": "integer"
+              }
+            }
+          |]
+
+        numeric_arr_types `shouldBe` Just
+          [aesonQQ|
+            {
+              "format": "numeric[]",
+              "type": "array",
+              "items": {
+                "type": "number"
+              }
+            }
+          |]
+
+        json_arr_types `shouldBe` Just
+          [aesonQQ|
+            {
+              "format": "json[]",
+              "type": "array",
+              "items": {}
+            }
+          |]
+
+        jsonb_arr_types `shouldBe` Just
+          [aesonQQ|
+            {
+              "format": "jsonb[]",
+              "type": "array",
+              "items": {}
+            }
+          |]
+
+
   describe "Detects default values" $ do
 
     it "text" $ do
@@ -569,7 +697,7 @@ spec actualPgVersion = describe "OpenAPI" $ do
     it "includes function summary/description and body schema for arguments" $ do
       r <- simpleBody <$> get "/"
 
-      let method s = key "paths" . key "/rpc/varied_arguments" . key s
+      let method s = key "paths" . key "/rpc/varied_arguments_openapi" . key s
           args = r ^? method "post" . key "parameters" . nth 0 . key "schema"
           summary = r ^? method "post" . key "summary"
           description = r ^? method "post" . key "description"
@@ -590,7 +718,15 @@ spec actualPgVersion = describe "OpenAPI" $ do
                 "date",
                 "money",
                 "enum",
-                "arr"
+                "text_arr",
+                "int_arr",
+                "bool_arr",
+                "char_arr",
+                "varchar_arr",
+                "bigint_arr",
+                "numeric_arr",
+                "json_arr",
+                "jsonb_arr"
               ],
               "properties": {
                 "double": {
@@ -617,9 +753,64 @@ spec actualPgVersion = describe "OpenAPI" $ do
                   "format": "enum_menagerie_type",
                   "type": "string"
                 },
-                "arr": {
+                "text_arr": {
                   "format": "text[]",
+                  "type": "array",
+                  "items": {
                     "type": "string"
+                  }
+                },
+                "int_arr": {
+                  "format": "integer[]",
+                  "type": "array",
+                  "items": {
+                    "type": "integer"
+                  }
+                },
+                "bool_arr": {
+                  "format": "boolean[]",
+                  "type": "array",
+                  "items": {
+                    "type": "boolean"
+                  }
+                },
+                "char_arr": {
+                  "format": "character[]",
+                  "type": "array",
+                  "items": {
+                    "type": "string"
+                  }
+                },
+                "varchar_arr": {
+                  "format": "character varying[]",
+                  "type": "array",
+                  "items": {
+                    "type": "string"
+                  }
+                },
+                "bigint_arr": {
+                  "format": "bigint[]",
+                  "type": "array",
+                  "items": {
+                    "type": "integer"
+                  }
+                },
+                "numeric_arr": {
+                  "format": "numeric[]",
+                  "type": "array",
+                  "items": {
+                    "type": "number"
+                  }
+                },
+                "json_arr": {
+                  "format": "json[]",
+                  "type": "array",
+                  "items": {}
+                },
+                "jsonb_arr": {
+                  "format": "jsonb[]",
+                  "type": "array",
+                  "items": {}
                 },
                 "integer": {
                   "format": "integer",

test/spec/Feature/Query/EmbedDisambiguationSpec.hs

@@ -202,10 +202,10 @@ spec =
         it "fails if the fk is not known" $
           get "/message?select=id,sender:person!space(name)&id=lt.4" `shouldRespondWith`
             [json|{
-              "hint":"Verify that 'message' and 'person' exist in the schema 'test' and that there is a foreign key relationship between them. If a new relationship was created, try reloading the schema cache.",
+              "hint":null,
               "message":"Could not find a relationship between 'message' and 'person' in the schema cache",
               "code": "PGRST200",
-              "details": null}|]
+              "details":"Searched for a foreign key relationship between 'message' and 'person' using the hint 'space' in the schema 'test', but no matches were found."}|]
             { matchStatus = 400
             , matchHeaders = [matchContentTypeJson] }
 
@@ -492,10 +492,10 @@ spec =
       it "doesn't work if the junction is only internal" $
         get "/end_1?select=end_2(*)" `shouldRespondWith`
           [json|{
-            "hint":"Verify that 'end_1' and 'end_2' exist in the schema 'test' and that there is a foreign key relationship between them. If a new relationship was created, try reloading the schema cache.",
+            "hint": null,
             "message":"Could not find a relationship between 'end_1' and 'end_2' in the schema cache",
             "code":"PGRST200",
-            "details": null}|]
+            "details": "Searched for a foreign key relationship between 'end_1' and 'end_2' in the schema 'test', but no matches were found."}|]
           { matchStatus  = 400
           , matchHeaders = [matchContentTypeJson] }
       it "shouldn't try to embed if the private junction has an exposed homonym" $
@@ -503,10 +503,10 @@ spec =
         -- Ref: https://github.com/PostgREST/postgrest/issues/1587#issuecomment-734995669
         get "/schauspieler?select=filme(*)" `shouldRespondWith`
           [json|{
-            "hint":"Verify that 'schauspieler' and 'filme' exist in the schema 'test' and that there is a foreign key relationship between them. If a new relationship was created, try reloading the schema cache.",
+            "hint":null,
             "message":"Could not find a relationship between 'schauspieler' and 'filme' in the schema cache",
             "code":"PGRST200",
-            "details": null}|]
+            "details":"Searched for a foreign key relationship between 'schauspieler' and 'filme' in the schema 'test', but no matches were found."}|]
           { matchStatus  = 400
           , matchHeaders = [matchContentTypeJson] }
 

test/spec/Feature/Query/QuerySpec.hs

@@ -590,8 +590,8 @@ spec actualPgVersion = do
           it "cannot request partitions as children from a partitioned table" $
             get "/car_models?id=in.(1,2,4)&select=id,name,car_model_sales_202101(id)&order=id.asc" `shouldRespondWith`
               [json|
-                {"hint":"Verify that 'car_models' and 'car_model_sales_202101' exist in the schema 'test' and that there is a foreign key relationship between them. If a new relationship was created, try reloading the schema cache.",
-                 "details":null,
+                {"hint":"Perhaps you meant 'car_model_sales' instead of 'car_model_sales_202101'.",
+                 "details":"Searched for a foreign key relationship between 'car_models' and 'car_model_sales_202101' in the schema 'test', but no matches were found.",
                  "code":"PGRST200",
                  "message":"Could not find a relationship between 'car_models' and 'car_model_sales_202101' in the schema cache"} |]
               { matchStatus  = 400
@@ -601,8 +601,8 @@ spec actualPgVersion = do
           it "cannot request a partitioned table as parent from a partition" $
             get "/car_model_sales_202101?select=id,name,car_models(id,name)&order=id.asc" `shouldRespondWith`
               [json|
-                {"hint":"Verify that 'car_model_sales_202101' and 'car_models' exist in the schema 'test' and that there is a foreign key relationship between them. If a new relationship was created, try reloading the schema cache.",
-                 "details":null,
+                {"hint":"Perhaps you meant 'car_model_sales' instead of 'car_model_sales_202101'.",
+                 "details":"Searched for a foreign key relationship between 'car_model_sales_202101' and 'car_models' in the schema 'test', but no matches were found.",
                  "code":"PGRST200",
                  "message":"Could not find a relationship between 'car_model_sales_202101' and 'car_models' in the schema cache"} |]
               { matchStatus  = 400
@@ -612,8 +612,8 @@ spec actualPgVersion = do
           it "cannot request a partition as parent from a partitioned table" $
             get "/car_model_sales?id=in.(1,3,4)&select=id,name,car_models_default(id,name)&order=id.asc" `shouldRespondWith`
               [json|
-                {"hint":"Verify that 'car_model_sales' and 'car_models_default' exist in the schema 'test' and that there is a foreign key relationship between them. If a new relationship was created, try reloading the schema cache.",
-                 "details":null,
+                {"hint":"Perhaps you meant 'car_models' instead of 'car_models_default'.",
+                 "details":"Searched for a foreign key relationship between 'car_model_sales' and 'car_models_default' in the schema 'test', but no matches were found.",
                  "code":"PGRST200",
                  "message":"Could not find a relationship between 'car_model_sales' and 'car_models_default' in the schema cache"} |]
               { matchStatus  = 400
@@ -623,8 +623,8 @@ spec actualPgVersion = do
           it "cannot request partitioned tables as children from a partition" $
             get "/car_models_default?select=id,name,car_model_sales(id,name)&order=id.asc" `shouldRespondWith`
               [json|
-                {"hint":"Verify that 'car_models_default' and 'car_model_sales' exist in the schema 'test' and that there is a foreign key relationship between them. If a new relationship was created, try reloading the schema cache.",
-                 "details":null,
+                {"hint":"Perhaps you meant 'car_model_sales' instead of 'car_models_default'.",
+                 "details":"Searched for a foreign key relationship between 'car_models_default' and 'car_model_sales' in the schema 'test', but no matches were found.",
                  "code":"PGRST200",
                  "message":"Could not find a relationship between 'car_models_default' and 'car_model_sales' in the schema cache"} |]
               { matchStatus  = 400

test/spec/Feature/Query/RpcSpec.hs

@@ -120,17 +120,39 @@ spec actualPgVersion =
       it "should fail with 404 on unknown proc name" $
         get "/rpc/fake" `shouldRespondWith` 404
 
+      it "should fail with 404 and hint the closest proc on unknown proc name" $
+        get "/rpc/sayhell" `shouldRespondWith`
+          [json| {
+            "hint":"Perhaps you meant to call the function test.sayhello",
+            "message":"Could not find the function test.sayhell without parameters in the schema cache",
+            "code":"PGRST202",
+            "details":"Searched for the function test.sayhell without parameters, but no matches were found in the schema cache."} |]
+          { matchStatus  = 404
+          , matchHeaders = [matchContentTypeJson]
+          }
+
       it "should fail with 404 on unknown proc args" $ do
         get "/rpc/sayhello" `shouldRespondWith` 404
         get "/rpc/sayhello?any_arg=value" `shouldRespondWith` 404
 
+      it "should fail with 404 and hint the closest args on unknown proc args" $
+        get "/rpc/sayhello?nam=Peter" `shouldRespondWith`
+          [json| {
+            "hint":"Perhaps you meant to call the function test.sayhello(name)",
+            "message":"Could not find the function test.sayhello(nam) in the schema cache",
+            "code":"PGRST202",
+            "details":"Searched for the function test.sayhello with parameter nam, but no matches were found in the schema cache."} |]
+          { matchStatus  = 404
+          , matchHeaders = [matchContentTypeJson]
+          }
+
       it "should not ignore unknown args and fail with 404" $
         get "/rpc/add_them?a=1&b=2&smthelse=blabla" `shouldRespondWith`
         [json| {
-          "hint":"If a new function was created in the database with this name and parameters, try reloading the schema cache.",
-          "message":"Could not find the test.add_them(a, b, smthelse) function in the schema cache",
+          "hint":"Perhaps you meant to call the function test.add_them(a, b)",
+          "message":"Could not find the function test.add_them(a, b, smthelse) in the schema cache",
           "code":"PGRST202",
-          "details":null} |]
+          "details":"Searched for the function test.add_them with parameters a, b, smthelse, but no matches were found in the schema cache."} |]
         { matchStatus  = 404
         , matchHeaders = [matchContentTypeJson]
         }
@@ -141,10 +163,10 @@ spec actualPgVersion =
           [json|{}|]
         `shouldRespondWith`
           [json| {
-            "hint":"If a new function was created in the database with this name and parameters, try reloading the schema cache.",
-            "message":"Could not find the test.sayhello function with a single json or jsonb parameter in the schema cache",
+            "hint":null,
+            "message":"Could not find the function test.sayhello in the schema cache",
             "code":"PGRST202",
-            "details":null} |]
+            "details":"Searched for the function test.sayhello with a single json/jsonb parameter, but no matches were found in the schema cache."} |]
         { matchStatus  = 404
         , matchHeaders = [matchContentTypeJson]
         }
@@ -152,19 +174,19 @@ spec actualPgVersion =
       it "should fail with 404 for overloaded functions with unknown args" $ do
         get "/rpc/overloaded?wrong_arg=value" `shouldRespondWith`
           [json| {
-            "hint":"If a new function was created in the database with this name and parameters, try reloading the schema cache.",
-            "message":"Could not find the test.overloaded(wrong_arg) function in the schema cache",
+            "hint":null,
+            "message":"Could not find the function test.overloaded(wrong_arg) in the schema cache",
             "code":"PGRST202",
-            "details":null} |]
+            "details":"Searched for the function test.overloaded with parameter wrong_arg, but no matches were found in the schema cache."} |]
           { matchStatus  = 404
           , matchHeaders = [matchContentTypeJson]
           }
         get "/rpc/overloaded?a=1&b=2&wrong_arg=value" `shouldRespondWith`
           [json| {
-            "hint":"If a new function was created in the database with this name and parameters, try reloading the schema cache.",
-            "message":"Could not find the test.overloaded(a, b, wrong_arg) function in the schema cache",
+            "hint":"Perhaps you meant to call the function test.overloaded(a, b, c)",
+            "message":"Could not find the function test.overloaded(a, b, wrong_arg) in the schema cache",
             "code":"PGRST202",
-            "details":null} |]
+            "details":"Searched for the function test.overloaded with parameters a, b, wrong_arg, but no matches were found in the schema cache."} |]
           { matchStatus  = 404
           , matchHeaders = [matchContentTypeJson]
           }
@@ -246,13 +268,17 @@ spec actualPgVersion =
           `shouldRespondWith`
             [json|{"id": 2, "articleStars": [{"userId": 3}]}|]
 
-      it "can embed an M2M relationship table" $
+      it "can embed an M2M relationship table" $ do
         get "/rpc/getallusers?select=name,tasks(name)&id=gt.1"
           `shouldRespondWith` [json|[
             {"name":"Michael Scott", "tasks":[{"name":"Design IOS"}, {"name":"Code IOS"}, {"name":"Design OSX"}]},
             {"name":"Dwight Schrute","tasks":[{"name":"Design w7"}, {"name":"Design IOS"}]}
           ]|]
           { matchHeaders = [matchContentTypeJson] }
+        -- https://github.com/PostgREST/postgrest/issues/2565
+        get "/rpc/get_yards?select=groups(*)"
+          `shouldRespondWith` [json|[]|]
+          { matchHeaders = [matchContentTypeJson] }
 
       it "can embed an M2M relationship table that has a parent relationship table" $
         get "/rpc/getallusers?select=name,tasks(name,project:projects(name))&id=gt.1"
@@ -1247,10 +1273,10 @@ spec actualPgVersion =
               [json|{"x": 1, "y": 2}|]
             `shouldRespondWith`
               [json|{
-                "hint": "If a new function was created in the database with this name and parameters, try reloading the schema cache.",
-                "message": "Could not find the test.unnamed_int_param(x, y) function or the test.unnamed_int_param function with a single unnamed json or jsonb parameter in the schema cache",
+                "hint": "Perhaps you meant to call the function test.unnamed_text_param",
+                "message": "Could not find the function test.unnamed_int_param(x, y) in the schema cache",
                 "code":"PGRST202",
-                "details":null
+                "details":"Searched for the function test.unnamed_int_param with parameters x, y or with a single unnamed json/jsonb parameter, but no matches were found in the schema cache."
               }|]
               { matchStatus  = 404
               , matchHeaders = [ matchContentTypeJson ]
@@ -1262,10 +1288,10 @@ spec actualPgVersion =
               [str|a simple text|]
             `shouldRespondWith`
               [json|{
-                "hint": "If a new function was created in the database with this name and parameters, try reloading the schema cache.",
-                "message": "Could not find the test.unnamed_int_param function with a single unnamed text parameter in the schema cache",
+                "hint": null,
+                "message": "Could not find the function test.unnamed_int_param in the schema cache",
                 "code":"PGRST202",
-                "details":null
+                "details":"Searched for the function test.unnamed_int_param with a single unnamed text parameter, but no matches were found in the schema cache."
               }|]
               { matchStatus  = 404
               , matchHeaders = [ matchContentTypeJson ]
@@ -1277,10 +1303,10 @@ spec actualPgVersion =
               [str|a simple text|]
             `shouldRespondWith`
               [json|{
-                "hint": "If a new function was created in the database with this name and parameters, try reloading the schema cache.",
-                "message": "Could not find the test.unnamed_int_param function with a single unnamed xml parameter in the schema cache",
+                "hint": null,
+                "message": "Could not find the function test.unnamed_int_param in the schema cache",
                 "code":"PGRST202",
-                "details":null
+                "details":"Searched for the function test.unnamed_int_param with a single unnamed xml parameter, but no matches were found in the schema cache."
               }|]
               { matchStatus  = 404
               , matchHeaders = [ matchContentTypeJson ]
@@ -1293,10 +1319,10 @@ spec actualPgVersion =
               file
           `shouldRespondWith`
             [json|{
-              "hint": "If a new function was created in the database with this name and parameters, try reloading the schema cache.",
-              "message": "Could not find the test.unnamed_int_param function with a single unnamed bytea parameter in the schema cache",
+              "hint": null,
+              "message": "Could not find the function test.unnamed_int_param in the schema cache",
               "code":"PGRST202",
-              "details":null
+              "details":"Searched for the function test.unnamed_int_param with a single unnamed bytea parameter, but no matches were found in the schema cache."
             }|]
             { matchStatus  = 404
             , matchHeaders = [ matchContentTypeJson ]
@@ -1353,10 +1379,10 @@ spec actualPgVersion =
               "a,b\n1,2\n4,6\n100,200"
             `shouldRespondWith`
               [json| {
-                "hint":"If a new function was created in the database with this name and parameters, try reloading the schema cache.",
-                "message":"Could not find the test.overloaded_unnamed_param(a, b) function in the schema cache",
+                "hint":"Perhaps you meant to call the function test.overloaded_unnamed_param(x, y)",
+                "message":"Could not find the function test.overloaded_unnamed_param(a, b) in the schema cache",
                 "code":"PGRST202",
-                "details":null
+                "details":"Searched for the function test.overloaded_unnamed_param with parameters a, b, but no matches were found in the schema cache."
               }|]
               { matchStatus  = 404
               , matchHeaders = [matchContentTypeJson]

test/spec/fixtures/schema.sql

@@ -272,6 +272,56 @@ $_$An RPC function
 
 Just a test for RPC function arguments$_$;
 
+CREATE FUNCTION varied_arguments_openapi(
+  double double precision,
+  "varchar" character varying,
+  "boolean" boolean,
+  date date,
+  money money,
+  enum enum_menagerie_type,
+  text_arr text[],
+  int_arr int[],
+  bool_arr boolean[],
+  char_arr char[],
+  varchar_arr varchar[],
+  bigint_arr bigint[],
+  numeric_arr numeric[],
+  json_arr json[],
+  jsonb_arr jsonb[],
+  "integer" integer default 42,
+  json json default '{}',
+  jsonb jsonb default '{}'
+) RETURNS json
+  LANGUAGE sql
+  IMMUTABLE
+AS $_$
+SELECT json_build_object(
+           'double', double,
+           'varchar', "varchar",
+           'boolean', "boolean",
+           'date', date,
+           'money', money,
+           'enum', enum,
+           'text_arr', text_arr,
+           'int_arr', int_arr,
+           'bool_arr', bool_arr,
+           'char_arr', char_arr,
+           'varchar_arr', varchar_arr,
+           'bigint_arr', bigint_arr,
+           'numeric_arr', numeric_arr,
+           'json_arr', json_arr,
+           'jsonb_arr', jsonb_arr,
+           'integer', "integer",
+           'json', json,
+           'jsonb', jsonb
+         );
+$_$;
+
+COMMENT ON FUNCTION varied_arguments_openapi(double precision, character varying, boolean, date, money, enum_menagerie_type, text[], int[], boolean[], char[], varchar[], bigint[], numeric[], json[], jsonb[], integer, json, jsonb) IS
+  $_$An RPC function
+
+Just a test for RPC function arguments$_$;
+
 
 CREATE FUNCTION json_argument(arg json) RETURNS text
 LANGUAGE sql
@@ -1814,7 +1864,16 @@ CREATE TABLE test.openapi_types(
   "a_real" real,
   "a_double_precision" double precision,
   "a_json" json,
-  "a_jsonb" jsonb
+  "a_jsonb" jsonb,
+  "a_text_arr" text[],
+  "a_int_arr" int[],
+  "a_bool_arr" boolean[],
+  "a_char_arr" char[],
+  "a_varchar_arr" varchar[],
+  "a_bigint_arr" bigint[],
+  "a_numeric_arr" numeric[],
+  "a_json_arr" json[],
+  "a_jsonb_arr" jsonb[]
 );
 
 CREATE TABLE test.openapi_defaults(
@@ -2996,3 +3055,34 @@ CREATE TABLE public.tb (
 
 CREATE VIEW test.va AS SELECT a1 FROM public.ta;
 CREATE VIEW test.vb AS SELECT b1 FROM public.tb;
+
+CREATE TABLE test.groups (
+    name text PRIMARY KEY
+);
+
+CREATE TABLE test.yards (
+    id bigint PRIMARY KEY
+);
+
+CREATE TABLE test.group_yard (
+    id bigint NOT NULL,
+    group_id text NOT NULL REFERENCES test.groups(name),
+    yard_id bigint NOT NULL REFERENCES test.yards(id),
+    PRIMARY KEY (id, group_id, yard_id)
+);
+
+CREATE FUNCTION test.get_yards() RETURNS SETOF test.yards
+LANGUAGE sql
+AS $$
+  select * from test.yards;
+$$;
+
+-- view's name is alphabetically before projects
+create view test.alpha_projects as
+  select c.id, p.name as pro_name, c.name as cli_name
+  from projects p join clients c on p.client_id = c.id;
+
+-- view's name is alphabetically after projects
+create view test.zeta_projects as
+  select c.id, p.name as pro_name, c.name as cli_name
+  from projects p join clients c on p.client_id = c.id;