Destroy related todos when an issue is deleted

2 files changed, 18 insertions, 1 deletions

diff --git a/db/migrate/20160324020319_remove_todos_for_deleted_issues.rb b/db/migrate/20160324020319_remove_todos_for_deleted_issues.rb
new file mode 100644
index 00000000000..1fff9759d1e
--- /dev/null
+++ b/db/migrate/20160324020319_remove_todos_for_deleted_issues.rb
@@ -0,0 +1,17 @@
+class RemoveTodosForDeletedIssues < ActiveRecord::Migration
+  def up
+    execute <<-SQL
+      DELETE FROM todos
+      WHERE todos.target_type = 'Issue'
+        AND NOT EXISTS (
+              SELECT *
+              FROM issues
+              WHERE issues.id = todos.target_id
+                AND issues.deleted_at IS NULL
+            )
+    SQL
+  end
+
+  def down
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index dce2bfe62ca..9b9319ddb4f 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160320204112) do
+ActiveRecord::Schema.define(version: 20160324020319) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"