add pixiv id search

db/migrate/20130331182719_add_pixiv_id_to_posts.rb

@@ -0,0 +1,12 @@
+class AddPixivIdToPosts < ActiveRecord::Migration
+  def up
+    execute "set statement_timeout = 0"
+    add_column :posts, :pixiv_id, :integer
+    execute "create index index_posts_on_pixiv_id on posts (pixiv_id) where pixiv_id is not null"
+  end
+  
+  def down
+    execute "set statement_timeout = 0"
+    remove_column :posts, :pixiv_id
+  end
+end

db/structure.sql

@@ -2330,7 +2330,8 @@ CREATE TABLE posts (
     has_children boolean DEFAULT false NOT NULL,
     is_banned boolean DEFAULT false NOT NULL,
     up_score integer,
-    down_score integer
+    down_score integer,
+    pixiv_id integer
 );
 
 
@@ -5993,7 +5994,7 @@ CREATE INDEX index_posts_on_parent_id ON posts USING btree (parent_id);
 -- Name: index_posts_on_pixiv_id; Type: INDEX; Schema: public; Owner: -; Tablespace: 
 --
 
-CREATE INDEX index_posts_on_pixiv_id ON posts USING btree ((("substring"((source)::text, 'pixiv.net/img.*/([0-9]+)[^/]*$'::text))::integer));
+CREATE INDEX index_posts_on_pixiv_id ON posts USING btree (pixiv_id) WHERE (pixiv_id IS NOT NULL);
 
 
 --
@@ -6410,4 +6411,6 @@ INSERT INTO schema_migrations (version) VALUES ('20130326035904');
 
 INSERT INTO schema_migrations (version) VALUES ('20130328092739');
 
-INSERT INTO schema_migrations (version) VALUES ('20130331180246');
+INSERT INTO schema_migrations (version) VALUES ('20130331180246');
+
+INSERT INTO schema_migrations (version) VALUES ('20130331182719');