1 files changed, 26 insertions, 0 deletions
diff --git a/db/migrate/20170928133643_create_fork_network_members.rb b/db/migrate/20170928133643_create_fork_network_members.rb
new file mode 100644
index 00000000000..836f023efdc
--- /dev/null
+++ b/db/migrate/20170928133643_create_fork_network_members.rb
@@ -0,0 +1,26 @@
+class CreateForkNetworkMembers < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    create_table :fork_network_members do |t|
+      t.references :fork_network, null: false, index: true, foreign_key: { on_delete: :cascade }
+      t.references :project, null: false, index: { unique: true }, foreign_key: { on_delete: :cascade }
+      t.references :forked_from_project, references: :projects
+    end
+
+    add_concurrent_foreign_key :fork_network_members, :projects,
+                               column: :forked_from_project_id,
+                               on_delete: :nullify
+  end
+
+  def down
+    if foreign_keys_for(:fork_network_members, :forked_from_project_id).any?
+      remove_foreign_key :fork_network_members, column: :forked_from_project_id
+    end
+    drop_table :fork_network_members
+  end
+end