Add set schema to middleware

Fix #828, breaking change: computed columns now only work if they are on
the config schema.

Fix #835, tests now not depend on the search_path of the
postgrest_test_authenticator.

test/Feature/QuerySpec.hs

@@ -171,6 +171,9 @@ spec = do
         [json| [{"id":1},{"id":2},{"id":3},{"id":4},{"id":5},{"id":6},{"id":7},{"id":8},{"id":9},{"id":10},{"id":11},{"id":12},{"id":13},{"id":14},{"id":15}] |]
         { matchHeaders = [matchContentTypeJson] }
 
+    it "cannot access a computed column that is outside of the config schema" $
+      get "/items?always_false=is.false" `shouldRespondWith` 400
+
     it "matches filtering nested items 2" $
       get "/clients?select=id,projects{id,tasks2{id,name}}&projects.tasks.name=like.Design*"
         `shouldRespondWith` [json| {"message":"Could not find foreign keys between these entities, No relation found between projects and tasks2"}|]

test/Feature/StructureSpec.hs

@@ -173,7 +173,7 @@ spec = do
                     "type": "string"
                   },
                   "enum": {
-                    "format": "test.enum_menagerie_type",
+                    "format": "enum_menagerie_type",
                     "type": "string"
                   },
                   "integer": {

test/fixtures/jwt.sql

@@ -4,7 +4,6 @@ set client_min_messages to warning;
 DROP SCHEMA IF EXISTS jwt CASCADE;
 CREATE SCHEMA jwt;
 
-
 CREATE OR REPLACE FUNCTION jwt.url_encode(data bytea) RETURNS text LANGUAGE sql AS $$
     SELECT translate(encode(data, 'base64'), E'+/=\n', '-_');
 $$;
@@ -31,7 +30,7 @@ WITH
       WHEN algorithm = 'HS384' THEN 'sha384'
       WHEN algorithm = 'HS512' THEN 'sha512'
       ELSE '' END)  -- hmac throws error
-SELECT jwt.url_encode(hmac(signables, secret, (select * FROM alg)));
+SELECT jwt.url_encode(public.hmac(signables, secret, (select * FROM alg)));
 $$;
 
 

test/fixtures/privileges.sql

@@ -81,3 +81,5 @@ GRANT UPDATE (article_id, user_id) ON TABLE limited_article_stars TO postgrest_t
 
 REVOKE EXECUTE ON FUNCTION privileged_hello(text) FROM PUBLIC; -- All functions are available to every role(PUBLIC) by default
 GRANT EXECUTE ON FUNCTION privileged_hello(text) TO postgrest_test_author;
+
+GRANT USAGE ON SCHEMA test TO postgrest_test_default_role;

test/fixtures/schema.sql

@@ -112,16 +112,19 @@ CREATE TABLE items (
 );
 
 
-SET search_path = public, pg_catalog;
-
---
--- Name: always_true(test.items); Type: FUNCTION; Schema: public; Owner: -
---
-
 CREATE FUNCTION always_true(test.items) RETURNS boolean
     LANGUAGE sql STABLE
     AS $$ SELECT true $$;
 
+CREATE FUNCTION anti_id(test.items) RETURNS bigint
+    LANGUAGE sql STABLE
+    AS $_$ SELECT $1.id * -1 $_$;
+
+SET search_path = public, pg_catalog;
+
+CREATE FUNCTION always_false(test.items) RETURNS boolean
+    LANGUAGE sql STABLE
+    AS $$ SELECT false $$;
 
 create table public_consumers (
     id                  serial             not null unique,
@@ -136,16 +139,6 @@ create table public_orders (
     primary key (id)
 );
 
---
--- Name: anti_id(test.items); Type: FUNCTION; Schema: public; Owner: -
---
-
-CREATE FUNCTION anti_id(test.items) RETURNS bigint
-    LANGUAGE sql STABLE
-    AS $_$ SELECT $1.id * -1 $_$;
-
-
-
 SET search_path = تست, pg_catalog;
 
 CREATE TABLE موارد (