jimmy/postgrest
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

feat: add one to one relationship for embedding

Browse Source 
BREAKING CHANGE: For the cases where one to one relationships are
detected, json objects will be returned instead of json arrays of length
1.

If you wish to override this behavior, you can use computed
relationships to return arrays again.
This commit is contained in:
steve-chavez
2022-08-18 22:36:47 -05:00
committed by Steve Chavez
parent 2afe13fa89
commit c45e85c5a6
15 changed files with 332 additions and 38 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/PostgREST/Query/QueryBuilder.hs
+8 -6
View File
@@ -64,14 +64,16 @@ getSelectsJoins rr@(Node (_, (name, Just rel, alias, _, joinType, _)) _) (select
internalTableName = pgFmtIdent $ "_" <> locTblName
correlatedSubquery sub al cond =
(if joinType == Just JTInner then "INNER" else "LEFT") <> " JOIN LATERAL ( " <> sub <> " ) AS " <> SQL.sql al <> " ON " <> cond
(sel, joi) = case rel of
Relationship{relCardinality=M2O _ _} ->
isToOne = case rel of
Relationship{relCardinality=M2O _ _} -> True
Relationship{relCardinality=O2O _ _} -> True
ComputedRelationship{relToOne=True} -> True
_ -> False
(sel, joi) = if isToOne
then
( SQL.sql ("row_to_json(" <> localTableName <> ".*) AS " <> pgFmtIdent aliasOrName)
, correlatedSubquery subquery localTableName "TRUE")
ComputedRelationship{relToOne=True} ->
( SQL.sql ("row_to_json(" <> localTableName <> ".*) AS " <> pgFmtIdent aliasOrName)
, correlatedSubquery subquery localTableName "TRUE")
_ ->
else
( SQL.sql $ "COALESCE( " <> localTableName <> "." <> internalTableName <> ", '[]') AS " <> pgFmtIdent aliasOrName
, correlatedSubquery (
"SELECT json_agg(" <> SQL.sql internalTableName <> ") AS " <> SQL.sql internalTableName <>