Fix aggregates time columns 2 (#1427)

* Adding a new comment sort. Fixes #1294

* Fixing a migration comment.

* Adding a comment for newest_comment_time_necro

* Make sure federated items set correct aggregates fields in trigger.

- Fixes #1402

migrations/2021-02-13-210612_set_correct_aggregates_time_columns/down.sql

@@ -0,0 +1,35 @@
+create or replace function comment_aggregates_comment()
+returns trigger language plpgsql
+as $$
+begin
+  IF (TG_OP = 'INSERT') THEN
+    insert into comment_aggregates (comment_id) values (NEW.id);
+  ELSIF (TG_OP = 'DELETE') THEN
+    delete from comment_aggregates where comment_id = OLD.id;
+  END IF;
+  return null;
+end $$;
+
+create or replace function post_aggregates_post()
+returns trigger language plpgsql
+as $$
+begin
+  IF (TG_OP = 'INSERT') THEN
+    insert into post_aggregates (post_id) values (NEW.id);
+  ELSIF (TG_OP = 'DELETE') THEN
+    delete from post_aggregates where post_id = OLD.id;
+  END IF;
+  return null;
+end $$;
+
+create or replace function community_aggregates_community()
+returns trigger language plpgsql
+as $$
+begin
+  IF (TG_OP = 'INSERT') THEN
+    insert into community_aggregates (community_id) values (NEW.id);
+  ELSIF (TG_OP = 'DELETE') THEN
+    delete from community_aggregates where community_id = OLD.id;
+  END IF;
+  return null;
+end $$;

migrations/2021-02-13-210612_set_correct_aggregates_time_columns/up.sql

@@ -0,0 +1,39 @@
+-- The published and updated columns on the aggregates tables are using now(), 
+-- when they should use the correct published or updated columns
+-- This is mainly a problem with federated posts being fetched
+
+create or replace function comment_aggregates_comment()
+returns trigger language plpgsql
+as $$
+begin
+  IF (TG_OP = 'INSERT') THEN
+    insert into comment_aggregates (comment_id, published) values (NEW.id, NEW.published);
+  ELSIF (TG_OP = 'DELETE') THEN
+    delete from comment_aggregates where comment_id = OLD.id;
+  END IF;
+  return null;
+end $$;
+
+create or replace function post_aggregates_post()
+returns trigger language plpgsql
+as $$
+begin
+  IF (TG_OP = 'INSERT') THEN
+    insert into post_aggregates (post_id, published, newest_comment_time, newest_comment_time_necro) values (NEW.id, NEW.published, NEW.published, NEW.published);
+  ELSIF (TG_OP = 'DELETE') THEN
+    delete from post_aggregates where post_id = OLD.id;
+  END IF;
+  return null;
+end $$;
+
+create or replace function community_aggregates_community()
+returns trigger language plpgsql
+as $$
+begin
+  IF (TG_OP = 'INSERT') THEN
+    insert into community_aggregates (community_id, published) values (NEW.id, NEW.published);
+  ELSIF (TG_OP = 'DELETE') THEN
+    delete from community_aggregates where community_id = OLD.id;
+  END IF;
+  return null;
+end $$;