add framework for post update pushes to pubsub

db/migrate/20160820003534_create_post_updates.rb

@@ -0,0 +1,9 @@
+class CreatePostUpdates < ActiveRecord::Migration
+  def up
+    execute "create unlogged table post_updates ( post_id integer, constraint unique_post_id unique(post_id) )"
+  end
+
+  def down
+    execute "drop table post_updates"
+  end
+end

db/structure.sql

@@ -2654,6 +2654,15 @@ CREATE SEQUENCE post_flags_id_seq
 ALTER SEQUENCE post_flags_id_seq OWNED BY post_flags.id;
 
 
+--
+-- Name: post_updates; Type: TABLE; Schema: public; Owner: -
+--
+
+CREATE UNLOGGED TABLE post_updates (
+    post_id integer
+);
+
+
 --
 -- Name: post_versions; Type: TABLE; Schema: public; Owner: -
 --
@@ -4750,6 +4759,14 @@ ALTER TABLE ONLY transaction_log_items
     ADD CONSTRAINT transaction_log_items_pkey PRIMARY KEY (id);
 
 
+--
+-- Name: unique_post_id; Type: CONSTRAINT; Schema: public; Owner: -
+--
+
+ALTER TABLE ONLY post_updates
+    ADD CONSTRAINT unique_post_id UNIQUE (post_id);
+
+
 --
 -- Name: uploads_pkey; Type: CONSTRAINT; Schema: public; Owner: -
 --
@@ -7391,3 +7408,5 @@ INSERT INTO schema_migrations (version) VALUES ('20160222211328');
 
 INSERT INTO schema_migrations (version) VALUES ('20160526174848');
 
+INSERT INTO schema_migrations (version) VALUES ('20160820003534');
+