Add rule_type to approval_project_rules

Adds migration to introduce non-regular rule_types to
approval_project_rules

changelogs/unreleased/9928ee-add-rule_type-to-approval-project-rules.yml

+---
+title: Add migration for adding rule_type to approval_project_rules
+merge_request: 30575
+author:
+type: added

db/migrate/20190709204413_add_rule_type_to_approval_project_rules.rb

+# frozen_string_literal: true
+
+class AddRuleTypeToApprovalProjectRules < ActiveRecord::Migration[5.1]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_column_with_default :approval_project_rules, :rule_type, :integer, limit: 2, default: 0, allow_null: false
+  end
+
+  def down
+    remove_column :approval_project_rules, :rule_type
+  end
+end

db/migrate/20190710151229_add_index_to_approval_project_rules_rule_type.rb

+# frozen_string_literal: true
+
+class AddIndexToApprovalProjectRulesRuleType < ActiveRecord::Migration[5.1]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index :approval_project_rules, :rule_type
+  end
+
+  def down
+    remove_concurrent_index :approval_project_rules, :rule_type
+  end
+end

db/schema.rb

@@ -282,7 +282,9 @@ ActiveRecord::Schema.define(version: 2019_07_15_114644) do
     t.integer "project_id", null: false
     t.integer "approvals_required", limit: 2, default: 0, null: false
     t.string "name", null: false
+    t.integer "rule_type", limit: 2, default: 0, null: false
     t.index ["project_id"], name: "index_approval_project_rules_on_project_id", using: :btree
+    t.index ["rule_type"], name: "index_approval_project_rules_on_rule_type", using: :btree
   end
 
   create_table "approval_project_rules_groups", force: :cascade do |t|