Version 0.2.12.1

A simpler way for non haskell devs to install postgrest

CHANGELOG.md

@@ -3,6 +3,12 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [0.2.12.1] - 2015-11-12
+
+### Fixed
+- Correct order for -> and ->> in a json path - @ruslantalpa
+- Return empty array instead of 500 when a set returning function returns an empty result set - @diogob
+
 ## [0.2.12.0] - 2015-10-25
 
 ### Added

app.json

@@ -10,7 +10,7 @@
     },
     "POSTGREST_VER": {
       "description": "Version of PostgREST to deploy",
-      "value": "0.2.12.0"
+      "value": "0.2.12.1"
     },
     "DB_NAME": {
       "description": "Database name",

docs/install/server.md

@@ -7,7 +7,7 @@ The [release page](https://github.com/begriffs/postgrest/releases/latest) has pr
 ```sh
 # Untar the release (available at https://github.com/begriffs/postgrest/releases/latest)
 
-$ tar zxf postgrest-0.2.12.0-osx.tar.xz
+$ tar zxf postgrest-0.2.12.1-osx.tar.xz
 
 # Try running it
 $ ./postgrest
@@ -22,13 +22,13 @@ $ ./postgrest
 
     <ul><li>Scientific Linux 6</li><li>CentOS</li><li>RHEL 6</li></ul>
 
-    Also it would be good to create packages for Homebrew, and apt.</p>
+    Also it would be good to create a package for apt.</p>
 </div>
 
 We'll learn the meaning of the command line flags later, but here is a minimal example of running the app. It does all operations as user `postgres`, including for unauthenticated requests.
 
 ```sh
-$ ./postgrest -d dbname -U postgres --a postgres --v1schema public
+$ ./postgrest -d dbname -U postgres -a postgres --v1schema public
 ```
 
 ### Building from Source
@@ -36,27 +36,54 @@ $ ./postgrest -d dbname -U postgres --a postgres --v1schema public
 When a prebuilt binary does not exist for your system you can build the project from source. You'll also need to do this if you want to help with development. [Stack](https://github.com/commercialhaskell/stack) makes it easy. It will install any necessary Haskell dependencies on your system.
 
 * [Install Stack](https://github.com/commercialhaskell/stack#how-to-install) for your platform
-* Build the project
+```bash
+#ubuntu example
+wget -q -O- https://s3.amazonaws.com/download.fpcomplete.com/ubuntu/fpco.key | sudo apt-key add -
+echo 'deb http://download.fpcomplete.com/ubuntu/trusty stable main'|sudo tee /etc/apt/sources.list.d/fpco.list
+sudo apt-get update && sudo apt-get install stack -y
+```
+* Build & install in one step
 
 ```bash
 git clone https://github.com/begriffs/postgrest.git
 cd postgrest
-stack build
+sudo stack install --install-ghc --local-bin-path /usr/local/bin
 ```
 
 * Run the server
 
 ```bash
-stack exec postgrest -- arg1 arg2
-# ... your arguments after the double dashes
+postgrest dbconnectionstring arg1 arg2
 ```
 
 If you want to run the test suite, stack can do that too: `stack test`.
 
+### Install via Homebrew (Mac OS X)
+
+You can use the Homebrew package manager to install PostgREST on Mac
+
+```bash
+# Ensure brew is up to date
+brew update
+
+# Check for any problems with brew's setup
+brew doctor
+
+# Install the postgrest package
+brew install postgrest
+```
+
+This will automatically install PostgreSQL as a dependency (see the [Installing PostgreSQL](#installing-postgresql) section for setup instructions). The process tends to take around 15 minutes to install the package and its dependencies.
+
+After installation completes, the tool is added to your $PATH and can be used from anywhere with:
+
+```bash
+postgrest --help
+```
+
 ### Installing PostgreSQL
 
 To use PostgREST you will need an underlying database. You can use something like Amazon [RDS](https://aws.amazon.com/rds/) but installing your own locally is cheaper and more convenient for development.
 
 * [Instructions for OS X](http://exponential.io/blog/2015/02/21/install-postgresql-on-mac-os-x-via-brew/)
 * [Instructions for Ubuntu 14.04](https://www.digitalocean.com/community/tutorials/how-to-install-and-use-postgresql-on-ubuntu-14-04)
-

postgrest.cabal

@@ -2,7 +2,7 @@ name:                  postgrest
 description:           Reads the schema of a PostgreSQL database and creates RESTful routes
                        for the tables and views, supporting all HTTP verbs that security
                        permits.
-version:               0.2.12.0
+version:               0.2.12.1
 synopsis:              REST API for any Postgres database
 license:               MIT
 license-file:          LICENSE

src/PostgREST/Parsers.hs

@@ -18,6 +18,7 @@ import           Data.Tree
 import           Network.Wai                   (Request, pathInfo, queryString)
 import           PostgREST.Types
 import           Text.ParserCombinators.Parsec hiding (many, (<|>))
+
 parseGetRequest :: Request -> Either ParseError ApiRequest
 parseGetRequest httpRequest =
   foldr addFilter <$> (addOrder <$> apiRequest <*> ord) <*> flts
@@ -77,7 +78,7 @@ lexeme p = ws *> p <* ws
 pTreePath :: Parser (Path,Field)
 pTreePath = do
   p <- pFieldName `sepBy1` pDelimiter
-  jp <- optionMaybe ( string "->" >>  pJsonPath)
+  jp <- optionMaybe pJsonPath
   let pp = map cs p
       jpp = map cs <$> jp
   return (init pp, (last pp, jpp))
@@ -98,14 +99,14 @@ pFieldName :: Parser Text
 pFieldName =  cs <$> (many1 (letter <|> digit <|> oneOf "_")
       <?> "field name (* or [a..z0..9_])")
 
-pJsonPathDelimiter :: Parser Text
-pJsonPathDelimiter = cs <$> (try (string "->>") <|> string "->")
+pJsonPathStep :: Parser Text
+pJsonPathStep = cs <$> try (string "->" *> pFieldName)
 
 pJsonPath :: Parser [Text]
-pJsonPath = pFieldName `sepBy1` pJsonPathDelimiter
+pJsonPath = (++) <$> many pJsonPathStep <*> ( (:[]) <$> (string "->>" *> pFieldName) )
 
 pField :: Parser Field
-pField = lexeme $ (,) <$> pFieldName <*> optionMaybe ( pJsonPathDelimiter *>  pJsonPath)
+pField = lexeme $ (,) <$> pFieldName <*> optionMaybe pJsonPath
 
 pSelect :: Parser SelectItem
 pSelect = lexeme $

src/PostgREST/PgQuery.hs

@@ -116,7 +116,7 @@ asJsonWithCount = withCount . asJson
 asJson :: StatementT
 asJson s = s {
   B.stmtTemplate =
-    "array_to_json(array_agg(row_to_json(t)))::character varying from ("
+    "array_to_json(coalesce(array_agg(row_to_json(t)), '{}'))::character varying from ("
     <> B.stmtTemplate s <> ") t" }
 
 withCount :: StatementT

test/Feature/QuerySpec.hs

@@ -296,12 +296,15 @@ spec =
   describe "jsonb" $ do
     it "can filter by properties inside json column" $ do
       get "/json?data->foo->>bar=eq.baz" `shouldRespondWith`
-        [json| [{"data": {"foo": {"bar": "baz"}}}] |]
+        [json| [{"data": {"id": 1, "foo": {"bar": "baz"}}}] |]
       get "/json?data->foo->>bar=eq.fake" `shouldRespondWith`
         [json| [] |]
     it "can filter by properties inside json column using not" $
       get "/json?data->foo->>bar=not.eq.baz" `shouldRespondWith`
         [json| [] |]
+    it "can filter by properties inside json column using ->>" $
+      get "/json?data->>id=eq.1" `shouldRespondWith`
+        [json| [{"data": {"id": 1, "foo": {"bar": "baz"}}}] |]
 
   describe "remote procedure call" $ do
     context "a proc that returns a set" . before_ (clearTable "items" >> createItems 10) .
@@ -310,6 +313,11 @@ spec =
         post "/rpc/getitemrange" [json| { "min": 2, "max": 4 } |] `shouldRespondWith`
           [json| [ {"id": 3}, {"id":4} ] |]
 
+    context "a proc that returns an empty rowset" $
+      it "returns empty json array" $
+        post "/rpc/test_empty_rowset" [json| {} |] `shouldRespondWith`
+          [json| [] |]
+
     context "a proc that returns plain text" $
       it "returns proper json" $
         post "/rpc/sayhello" [json| { "name": "world" } |] `shouldRespondWith`

test/SpecHelper.hs

@@ -184,4 +184,6 @@ createJsonData = do
       [H.stmt|
         insert into "1".json (data) values (?)
       |]
-      (J.object [("foo", J.object [("bar", J.String "baz")])])
+      (J.object [("id", J.Number 1)
+                ,("foo", J.object [("bar", J.String "baz")])
+                ])

test/fixtures/schema.sql

@@ -297,7 +297,9 @@ CREATE FUNCTION "1".getitemrange(min bigint, max bigint) RETURNS SETOF "1".items
     SELECT * FROM "1".items WHERE id > $1 AND id <= $2;
 $$ LANGUAGE SQL;
 
-
+CREATE FUNCTION "1".test_empty_rowset() RETURNS SETOF int AS $$
+    SELECT null::int FROM (SELECT 1) a WHERE false;
+$$ LANGUAGE SQL;
 
 CREATE FUNCTION "1".sayhello(name text) RETURNS text AS $$
     SELECT 'Hello, ' || $1;
@@ -663,6 +665,10 @@ REVOKE ALL ON FUNCTION getitemrange(bigint, bigint) FROM postgrest_test;
 GRANT EXECUTE ON FUNCTION getitemrange(bigint, bigint) TO postgrest_test;
 GRANT EXECUTE ON FUNCTION getitemrange(bigint, bigint) TO postgrest_anonymous;
 
+REVOKE ALL ON FUNCTION test_empty_rowset() FROM PUBLIC;
+REVOKE ALL ON FUNCTION test_empty_rowset() FROM postgrest_test;
+GRANT EXECUTE ON FUNCTION test_empty_rowset() TO postgrest_test;
+GRANT EXECUTE ON FUNCTION test_empty_rowset() TO postgrest_anonymous;
 
 REVOKE ALL ON FUNCTION sayhello(text) FROM PUBLIC;
 REVOKE ALL ON FUNCTION sayhello(text) FROM postgrest_test;