update annotations

app/models/user_field.rb

@@ -16,12 +16,12 @@ end
 # Table name: user_fields
 #
 #  id                :integer          not null, primary key
-#  name              :string           not null
-#  field_type        :string           not null
-#  created_at        :datetime         not null
-#  updated_at        :datetime         not null
+#  name              :string(255)      not null
+#  field_type        :string(255)      not null
+#  created_at        :datetime
+#  updated_at        :datetime
 #  editable          :boolean          default(FALSE), not null
-#  description       :string           not null
+#  description       :string(255)      not null
 #  required          :boolean          default(TRUE), not null
 #  show_on_profile   :boolean          default(FALSE), not null
 #  position          :integer          default(0)