-ActionView::Base.field_error_proc = proc do |html_tag, _instance|
- class_attr_index = html_tag.index 'class="'
-
- if class_attr_index
- html_tag.insert class_attr_index + 7, "field_with_errors "
- else
- html_tag.insert html_tag.index(%r{/?>}), ' class="field_with_errors"'
- end
-end