How can I handle error messages in Flask-WTF?

How can I handle error messages in Flask-WTF?

In Flask-WTF, you can handle error messages by accessing the form's errors attribute. Each field has its own error list.

Can you show me an example of how to display these error messages in a template?

Sure! You can loop through the form fields in your template and display errors like this: {% for field in form %} {{ field.label }} {{ field() }} {% for error in field.errors %} <span class='error'>{{ error }}</span> {% endfor %} {% endfor %}.

What if I want to customize the error messages?

You can customize error messages by passing a message to the validators in your form class. For example, DataRequired(message='This field is required.').

Is there a way to display a general error message for the entire form?

Yes, you can add a general error message by checking if the form.validate_on_submit() returns False and then displaying a message in your template.