Validation errors should be shown on the same page

[displacedaussie]

Problem

In Plomino 2, validation errors are shown on a different page after submit. The user must click Back to return to the form. In Plomino 1 this was handled via a popup which blocked submission and displayed the validation errors.

This isn't very user friendly. Ideally the errors should be shown on the same page like normal validation/errors in Plone and fields that have failed validation should be highlighted. The errors should either be shown at the top of the page (with links to the failed fields), or the errors should be inline.

This is done in multipage by handling traversal/redirection and then injecting page_errors, but could be generalised to all forms.

Options

• Change the validation step to an AJAX request and block submission unless the form validates Further JavaScript could then be used to:
  • Display resulting errors in a popup
  • Display resulting errors at the top of the page but highlight/link the fields
  • Display resulting errors inline with the failed fields

con: this doesn't work nicely if the user doesn't have JavaScript

• Change the submission step so that createDocument/saveDocument doesn't complete if validation fails. Instead, Plomino returns the page (with REQUEST as is) while also displaying any errors.

[displacedaussie]

@ebrehault The current method for handling errors is one of the first things that our users notice. In particular they complain about/are surprised by:

• having to go back
• not knowing what field the error relates to
• not seeing which fields on the form have invalid data

Is there a reason that Plomino doesn't do something closer to the way plone normally handles form errors?

[djay]

I think where possible plomino should handle interactions with progressive enhancement, so we shouldn't have an AJAX only way of handling errors.