Drop deprecated column from projects

changelogs/unreleased/34636-drop-deprecated-column-from-projects-table.yml

+---
+title: Drop deprecated column from projects table
+merge_request: 18914
+author:
+type: deprecated

db/post_migrate/20191015154408_drop_merge_requests_require_code_owner_approval_from_projects.rb

+# frozen_string_literal: true
+
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class DropMergeRequestsRequireCodeOwnerApprovalFromProjects < ActiveRecord::Migration[5.2]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    remove_column :projects, :merge_requests_require_code_owner_approval, :boolean
+  end
+
+  def down
+    add_column :projects, :merge_requests_require_code_owner_approval, :boolean
+
+    add_concurrent_index(
+      :projects,
+      %i[archived pending_delete merge_requests_require_code_owner_approval],
+      name: 'projects_requiring_code_owner_approval',
+      where: '((pending_delete = false) AND (archived = false) AND (merge_requests_require_code_owner_approval = true))'
+    )
+  end
+end

db/schema.rb

@@ -3186,7 +3186,6 @@ ActiveRecord::Schema.define(version: 2019_11_18_182722) do
     t.bigint "pool_repository_id"
     t.string "runners_token_encrypted"
     t.string "bfg_object_map"
-    t.boolean "merge_requests_require_code_owner_approval"
     t.boolean "detected_repository_languages"
     t.boolean "merge_requests_disable_committers_approval"
     t.boolean "require_password_to_approve"
@@ -3198,7 +3197,6 @@ ActiveRecord::Schema.define(version: 2019_11_18_182722) do
     t.date "marked_for_deletion_at"
     t.integer "marked_for_deletion_by_user_id"
     t.index "lower((name)::text)", name: "index_projects_on_lower_name"
-    t.index ["archived", "pending_delete", "merge_requests_require_code_owner_approval"], name: "projects_requiring_code_owner_approval", where: "((pending_delete = false) AND (archived = false) AND (merge_requests_require_code_owner_approval = true))"
     t.index ["created_at", "id"], name: "index_projects_on_created_at_and_id"
     t.index ["creator_id"], name: "index_projects_on_creator_id"
     t.index ["description"], name: "index_projects_on_description_trigram", opclass: :gin_trgm_ops, using: :gin

spec/migrations/20191015154408_drop_merge_requests_require_code_owner_approval_from_projects_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+require Rails.root.join('db', 'post_migrate', '20191015154408_drop_merge_requests_require_code_owner_approval_from_projects.rb')
+
+describe DropMergeRequestsRequireCodeOwnerApprovalFromProjects, :migration do
+  let(:projects_table) { table(:projects) }
+
+  subject(:migration) { described_class.new }
+
+  describe "without running the migration" do
+    it "project_table has a :merge_requests_require_code_owner_approval column" do
+      expect(projects_table.column_names)
+        .to include("merge_requests_require_code_owner_approval")
+    end
+
+    it "project_table has a :projects_requiring_code_owner_approval index" do
+      expect(ActiveRecord::Base.connection.indexes(:projects).collect(&:name))
+        .to include("projects_requiring_code_owner_approval")
+    end
+  end
+
+  describe '#up' do
+    context "without running "
+    before do
+      migrate!
+    end
+
+    it "drops the :merge_requests_require_code_owner_approval column" do
+      expect(projects_table.column_names)
+        .not_to include("merge_requests_require_code_owner_approval")
+    end
+
+    it "drops the :projects_requiring_code_owner_approval index" do
+      expect(ActiveRecord::Base.connection.indexes(:projects).collect(&:name))
+        .not_to include("projects_requiring_code_owner_approval")
+    end
+  end
+
+  describe "#down" do
+    before do
+      migration.up
+      migration.down
+    end
+
+    it "project_table has a :merge_requests_require_code_owner_approval column" do
+      expect(projects_table.column_names)
+        .to include("merge_requests_require_code_owner_approval")
+    end
+
+    it "project_table has a :projects_requiring_code_owner_approval index" do
+      expect(ActiveRecord::Base.connection.indexes(:projects).collect(&:name))
+        .to include("projects_requiring_code_owner_approval")
+    end
+  end
+end