WTForms getting the errors

Question

Currently in WTForms to access errors you have to loop through field errors like so:

for error in form.username.errors:         print error 

Since I'm building a rest application which uses no form views, I'm forced to check through all form fields in order to find where the error lies.

Is there a way I could do something like:

for fieldName, errorMessage in form.errors:         ...do something 

Answer 1

The actual form object has an errors attribute that contains the field names and their errors in a dictionary. So you could do:

for fieldName, errorMessages in form.errors.items():     for err in errorMessages:         # do something with your errorMessages for fieldName 

Answer 2

A cleaner solution for Flask templates:

Python 3:

{% for field, errors in form.errors.items() %} <div class="alert alert-error">     {{ form[field].label }}: {{ ', '.join(errors) }} </div> {% endfor %} 

Python 2:

{% for field, errors in form.errors.iteritems() %} <div class="alert alert-error">     {{ form[field].label }}: {{ ', '.join(errors) }} </div> {% endfor %}