Allow specifying source column in embed, fix #1078

test/fixtures/data.sql

@@ -383,3 +383,19 @@ INSERT INTO books VALUES (6, 'Lord of the Flies', 1954, 6);
 INSERT INTO books VALUES (7, 'To Kill a Mockingbird', 1960, 7);
 INSERT INTO books VALUES (8, 'Slaughterhouse-Five', 1969, 8);
 INSERT INTO books VALUES (9, 'One Flew Over the Cuckoo''s Nest', 1962, 9);
+
+SET search_path = test, pg_catalog;
+
+TRUNCATE TABLE person CASCADE;
+
+INSERT INTO person VALUES (1, 'John');
+INSERT INTO person VALUES (2, 'Jane');
+INSERT INTO person VALUES (3, 'Jake');
+INSERT INTO person VALUES (4, 'Julie');
+
+TRUNCATE TABLE message CASCADE;
+INSERT INTO message VALUES (1, 'Hello Jane', 1, 2);
+INSERT INTO message VALUES (2, 'Hi John', 2, 1);
+INSERT INTO message VALUES (3, 'How are you doing?', 1, 2);
+INSERT INTO message VALUES (4, 'Hey Julie', 3, 4);
+INSERT INTO message VALUES (5, 'What''s up Jake', 4, 3);

test/fixtures/privileges.sql

@@ -73,6 +73,9 @@ GRANT ALL ON TABLE
     , forties_books
     , fifties_books
     , sixties_books
+    , person
+    , message
+    , person_detail
 TO postgrest_test_anonymous;
 
 GRANT INSERT ON TABLE insertonly TO postgrest_test_anonymous;

test/fixtures/schema.sql

@@ -1409,3 +1409,19 @@ create view test.books as select id, title, publication_year, author_id from pri
 create view test.forties_books as select id, title, publication_year, author_id from private.books where publication_year >= 1940 and publication_year < 1950;
 create view test.fifties_books as select id, title, publication_year, author_id from private.books where publication_year >= 1950 and publication_year < 1960;
 create view test.sixties_books as select id, title, publication_year, author_id from private.books where publication_year >= 1960 and publication_year < 1970;
+
+create table person (
+  id integer primary key,
+  name character varying not null);
+
+create table message (
+  id integer primary key,
+  body text not null default '',
+  sender bigint not null references person(id),
+  recipient bigint not null references person(id));
+
+create view person_detail as
+  select p.id, p.name, s.count as sent, r.count as received
+  from person p
+  join lateral (select message.sender, count(message.id) as count from message group by message.sender) s on s.sender = p.id
+  join lateral (select message.recipient, count(message.id) as count from message group by message.recipient) r on r.recipient = p.id;