Add a data migration to fix some missing timestamps in the members table (again)

db/migrate/20160804150737_add_timestamps_to_members_again.rb

+# rubocop:disable all
+# 20141121133009_add_timestamps_to_members.rb was meant to ensure that all
+# rows in the members table had created_at and updated_at set, following an
+# error in a previous migration. This failed to set all rows in at least one
+# case: https://gitlab.com/gitlab-org/gitlab-ce/issues/20568
+#
+# Why this happened is lost in the mists of time, so repeat the SQL query
+# without speculation, just in case more than one person was affected.
+class AddTimestampsToMembersAgain < ActiveRecord::Migration
+
+  def up
+    execute "UPDATE members SET created_at = NOW() WHERE created_at IS NULL"
+    execute "UPDATE members SET updated_at = NOW() WHERE updated_at IS NULL"
+  end
+
+  def down
+    # no change
+  end
+
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160802010328) do
+ActiveRecord::Schema.define(version: 20160804150737) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"