Use heredoc SQL blocks in `AddFromAccountIdToNotifications` migration (#26178)

db/migrate/20161203164520_add_from_account_id_to_notifications.rb

@@ -4,10 +4,39 @@ class AddFromAccountIdToNotifications < ActiveRecord::Migration[5.0]
   def up
     add_column :notifications, :from_account_id, :integer
 
-    Notification.where(from_account_id: nil).where(activity_type: 'Status').update_all('from_account_id = (SELECT statuses.account_id FROM notifications AS notifications1 INNER JOIN statuses ON notifications1.activity_id = statuses.id WHERE notifications1.activity_type = \'Status\' AND notifications1.id = notifications.id)')
-    Notification.where(from_account_id: nil).where(activity_type: 'Mention').update_all('from_account_id = (SELECT statuses.account_id FROM notifications AS notifications1 INNER JOIN mentions ON notifications1.activity_id = mentions.id INNER JOIN statuses ON mentions.status_id = statuses.id WHERE notifications1.activity_type = \'Mention\' AND notifications1.id = notifications.id)')
-    Notification.where(from_account_id: nil).where(activity_type: 'Favourite').update_all('from_account_id = (SELECT favourites.account_id FROM notifications AS notifications1 INNER JOIN favourites ON notifications1.activity_id = favourites.id WHERE notifications1.activity_type = \'Favourite\' AND notifications1.id = notifications.id)')
-    Notification.where(from_account_id: nil).where(activity_type: 'Follow').update_all('from_account_id = (SELECT follows.account_id FROM notifications AS notifications1 INNER JOIN follows ON notifications1.activity_id = follows.id WHERE notifications1.activity_type = \'Follow\' AND notifications1.id = notifications.id)')
+    Notification.where(from_account_id: nil).where(activity_type: 'Status').update_all(<<~SQL.squish)
+      from_account_id = (
+        SELECT statuses.account_id
+        FROM notifications AS notifications1
+        INNER JOIN statuses ON notifications1.activity_id = statuses.id
+        WHERE notifications1.activity_type = 'Status' AND notifications1.id = notifications.id
+      )
+    SQL
+    Notification.where(from_account_id: nil).where(activity_type: 'Mention').update_all(<<~SQL.squish)
+      from_account_id = (
+        SELECT statuses.account_id
+        FROM notifications AS notifications1
+        INNER JOIN mentions ON notifications1.activity_id = mentions.id
+        INNER JOIN statuses ON mentions.status_id = statuses.id
+        WHERE notifications1.activity_type = 'Mention' AND notifications1.id = notifications.id
+      )
+    SQL
+    Notification.where(from_account_id: nil).where(activity_type: 'Favourite').update_all(<<~SQL.squish)
+      from_account_id = (
+        SELECT favourites.account_id
+        FROM notifications AS notifications1
+        INNER JOIN favourites ON notifications1.activity_id = favourites.id
+        WHERE notifications1.activity_type = 'Favourite' AND notifications1.id = notifications.id
+      )
+    SQL
+    Notification.where(from_account_id: nil).where(activity_type: 'Follow').update_all(<<~SQL.squish)
+      from_account_id = (
+        SELECT follows.account_id
+        FROM notifications AS notifications1
+        INNER JOIN follows ON notifications1.activity_id = follows.id
+        WHERE notifications1.activity_type = 'Follow' AND notifications1.id = notifications.id
+      )
+    SQL
   end
 
   def down