Add multiple assignees migration and table population

This will be further required for supporting multi-assignees MRs

1 files changed, 22 insertions, 0 deletions

diff --git a/db/migrate/20190315191339_create_merge_request_assignees_table.rb b/db/migrate/20190315191339_create_merge_request_assignees_table.rb
new file mode 100644
index 00000000000..6fc4463f281
--- /dev/null
+++ b/db/migrate/20190315191339_create_merge_request_assignees_table.rb
@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+class CreateMergeRequestAssigneesTable < ActiveRecord::Migration[5.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  INDEX_NAME = 'index_merge_request_assignees_on_merge_request_id_and_user_id'
+
+  def up
+    create_table :merge_request_assignees do |t|
+      t.references :user, foreign_key: { on_delete: :cascade }, index: true, null: false
+      t.references :merge_request, foreign_key: { on_delete: :cascade }, null: false
+    end
+
+    add_index :merge_request_assignees, [:merge_request_id, :user_id], unique: true, name: INDEX_NAME
+  end
+
+  def down
+    drop_table :merge_request_assignees
+  end
+end