Allow PATCH/DELETE w/o Prefer when no SELECT privs

PATCH/DELETE can now be done without adding Prefer return=minimal when
the user doesn't have SELECT privileges.

* Also fix PATCH wrong HTTP status code

test/fixtures/data.sql

@@ -507,3 +507,8 @@ INSERT INTO web_content VALUES (1, 'fezz', 0);
 INSERT INTO web_content VALUES (2, 'foo', 0);
 INSERT INTO web_content VALUES (3, 'bar', 0);
 INSERT INTO web_content VALUES (4, 'wut', 1);
+
+TRUNCATE TABLE app_users CASCADE;
+INSERT INTO app_users (id, email, "password") VALUES (1, 'test@123.com','pass');
+INSERT INTO app_users (id, email, "password") VALUES (2, 'abc@123.com','pass');
+INSERT INTO app_users (id, email, "password") VALUES (3, 'def@123.com','pass');

test/fixtures/privileges.sql

@@ -123,6 +123,10 @@ GRANT SELECT (article_id, user_id) ON TABLE limited_article_stars TO postgrest_t
 GRANT INSERT (article_id, user_id) ON TABLE limited_article_stars TO postgrest_test_anonymous;
 GRANT UPDATE (article_id, user_id) ON TABLE limited_article_stars TO postgrest_test_anonymous;
 
+GRANT SELECT(id, email) ON TABLE app_users TO postgrest_test_anonymous;
+GRANT INSERT, UPDATE    ON TABLE app_users TO postgrest_test_anonymous;
+GRANT DELETE            ON TABLE app_users TO postgrest_test_anonymous;
+
 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;
 

test/fixtures/schema.sql

@@ -1753,3 +1753,9 @@ CREATE TABLE web_content (
 CREATE FUNCTION getallusers() RETURNS SETOF users AS $$
   SELECT * FROM test.users;
 $$ LANGUAGE sql;
+
+create table app_users (
+  id       integer    primary key,
+  email    text       unique not null,
+  password text       not null
+);