Custom validators not working

[MPanek6]

Custom validators don't seem to fire. I've followed the documentation on the wiki as well as tried various online solutions

from wtforms import Form, StringField
from wtforms.validators import ValidationError

class xyzForm(Form):
    name = StringField("name")

    def validate_name(form, field):    # Using (self, field) or (self, form, field) also doesn't work
        print('fired')
        if len(field.data) > 2:
            raise ValidationError('blahblah')

Similarly, the following also doesn't work

from wtforms import Form, StringField
from wtforms.validators import ValidationError

def custom_val(form, field): 
    print('fired')
    if len(field.data) > 2:
        raise ValidationError('blahblah')

class xyzForm(Form):
    name = StringField("name", validators=[custom_val])

Environment

• Python version: 3.9.18
• wtforms version: 3.1.2