Add counter caches for a large performance increase on API requests

1 files changed, 14 insertions, 0 deletions

diff --git a/db/migrate/20170330021336_add_counter_caches.rb b/db/migrate/20170330021336_add_counter_caches.rb
new file mode 100644
index 000000000..eb4e54d0a
--- /dev/null
+++ b/db/migrate/20170330021336_add_counter_caches.rb
@@ -0,0 +1,14 @@
+class AddCounterCaches < ActiveRecord::Migration[5.0]
+  def change
+  	add_column :statuses, :favourites_count, :integer
+  	add_column :statuses, :reblogs_count, :integer
+
+  	execute('update statuses set favourites_count = (select count(*) from favourites where favourites.status_id = statuses.id), reblogs_count = (select count(*) from statuses as reblogs where reblogs.reblog_of_id = statuses.id)')
+
+  	add_column :accounts, :statuses_count, :integer
+  	add_column :accounts, :followers_count, :integer
+  	add_column :accounts, :following_count, :integer
+
+  	execute('update accounts set statuses_count = (select count(*) from statuses where account_id = accounts.id), followers_count = (select count(*) from follows where target_account_id = accounts.id), following_count = (select count(*) from follows where account_id = accounts.id)')
+  end
+end