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feat: Support accessing array items and fields of composite types through json operators

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This is supported in select=, in filters and in order=.

Resolves #1543

Resolves #2075

Signed-off-by: Wolfgang Walther <walther@technowledgy.de>
This commit is contained in:
Wolfgang Walther
2022-02-03 08:13:38 +01:00
committed by Wolfgang Walther
parent 87bd8e72cf
commit 9f1b5c0a81
7 changed files with 115 additions and 4 deletions
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src/PostgREST/Query/SqlFragment.hs
+4 -1
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@@ -197,7 +197,10 @@ pgFmtColumn table "*" = fromQi table <> ".*"
pgFmtColumn table c = fromQi table <> "." <> pgFmtIdent c
pgFmtField :: QualifiedIdentifier -> Field -> SQL.Snippet
pgFmtField table (c, jp) = SQL.sql (pgFmtColumn table c) <> pgFmtJsonPath jp
pgFmtField table (c, []) = SQL.sql (pgFmtColumn table c)
-- Using to_jsonb instead of to_json to avoid missing operator errors when filtering:
-- "operator does not exist: json = unknown"
pgFmtField table (c, jp) = SQL.sql ("to_jsonb(" <> pgFmtColumn table c <> ")") <> pgFmtJsonPath jp
pgFmtSelectItem :: QualifiedIdentifier -> SelectItem -> SQL.Snippet
pgFmtSelectItem table (f@(fName, jp), Nothing, alias, _, _) = pgFmtField table f <> SQL.sql (pgFmtAs fName jp alias)