test: spread embed disambiguates recursive m2m

test/spec/Feature/Query/EmbedDisambiguationSpec.hs

@@ -109,6 +109,18 @@ spec =
         get "/whatev_sites?select=*,whatev_jobs!site_id_2(..whatev_projects!project_id_1(*))" `shouldRespondWith` [json|[]|]
         get "/whatev_sites?select=*,whatev_jobs!site_id_2(..whatev_projects!project_id_2(*))" `shouldRespondWith` [json|[]|]
 
+      it "can disambiguate a recursive m2m with spread embeds" $ do
+        get "/posters?select=*,subscribers:subscriptions!subscribed(..posters!subscriber(*))&limit=1" `shouldRespondWith`
+          [json| [ {"id":1,"name":"Mark","subscribers":[{"id":3,"name":"Bill"}, {"id":4,"name":"Jeff"}]}]|]
+          { matchStatus  = 200
+          , matchHeaders = [matchContentTypeJson]
+          }
+        get "/posters?select=*,subscriptions!subscriber(..posters!subscribed(*))&limit=1" `shouldRespondWith`
+          [json| [{"id":1,"name":"Mark","subscriptions":[{"id":2,"name":"Elon"}]}]|]
+          { matchStatus  = 200
+          , matchHeaders = [matchContentTypeJson]
+          }
+
       it "errs on an ambiguous embed that has two one-to-one relationships" $
         get "/first?select=second(*)" `shouldRespondWith`
           [json| {

test/spec/fixtures/data.sql

@@ -832,3 +832,9 @@ INSERT INTO trash(id) VALUES (1), (2), (3);
 
 TRUNCATE TABLE trash_details CASCADE;
 INSERT INTO trash_details(id,jsonb_col) VALUES (1,'{"key": 10}'), (2,'{"key": 6}'), (3,'{"key": 8}');
+
+TRUNCATE TABLE posters CASCADE;
+INSERT INTO posters(id,name) VALUES (1,'Mark'), (2,'Elon'), (3,'Bill'), (4,'Jeff');
+
+TRUNCATE TABLE subscriptions CASCADE;
+INSERT INTO subscriptions(subscriber,subscribed) VALUES (3,1), (4,1), (1,2);

test/spec/fixtures/schema.sql

@@ -3026,3 +3026,14 @@ LANGUAGE sql
 AS $$
   select * from test.yards;
 $$;
+
+create table test.posters(
+  id int primary key,
+  name text
+);
+
+create table test.subscriptions(
+  subscriber int references test.posters(id),
+  subscribed int references test.posters(id),
+  primary key(subscriber, subscribed)
+);