Revertible related_issues table state

db/migrate/20170424131911_create_related_issues_table.rb

@@ -3,7 +3,9 @@ class CreateRelatedIssuesTable < ActiveRecord::Migration
 
   DOWNTIME = false
 
-  def change
+  disable_ddl_transaction!
+
+  def up
     create_table :related_issues do |t|
       t.integer :issue_id, null: false, index: true
       t.integer :related_issue_id, null: false, index: true
@@ -16,4 +18,8 @@ class CreateRelatedIssuesTable < ActiveRecord::Migration
     add_concurrent_foreign_key :related_issues, :issues, column: :issue_id
     add_concurrent_foreign_key :related_issues, :issues, column: :related_issue_id
   end
+
+  def down
+    drop_table :related_issues
+  end
 end

db/schema.rb

@@ -1747,8 +1747,8 @@ ActiveRecord::Schema.define(version: 20170602003304) do
   add_foreign_key "protected_tag_create_access_levels", "namespaces", column: "group_id"
   add_foreign_key "protected_tag_create_access_levels", "protected_tags"
   add_foreign_key "protected_tag_create_access_levels", "users"
-  add_foreign_key "related_issues", "issues"
-  add_foreign_key "related_issues", "issues", column: "related_issue_id"
+  add_foreign_key "related_issues", "issues", column: "related_issue_id", name: "fk_f89e405611", on_delete: :cascade
+  add_foreign_key "related_issues", "issues", name: "fk_7bc934491d", on_delete: :cascade
   add_foreign_key "remote_mirrors", "projects"
   add_foreign_key "subscriptions", "projects", on_delete: :cascade
   add_foreign_key "system_note_metadata", "notes", name: "fk_d83a918cb1", on_delete: :cascade