Advantages to using URLField over TextField?

Question

As I understand it you should always use a TextField for a variable length string when your using a PostgreSQL database because the speed difference between a

Answer 1

Try this class:

class LongURLField(TextField):
    description = 'Long URL'

    def __init__(self, verbose_name=None, name=None, **kwargs):
        TextField.__init__(self, verbose_name, name, **kwargs)
        self.validators.append(validators.URLValidator())

    def formfield(self, **kwargs):
        # As with TextField, this will cause URL validation to be performed
        # twice.
        defaults = {
            'form_class': forms.URLField,
        }
        defaults.update(kwargs)
        return super(LongURLField, self).formfield(**defaults)