models.SlugField doesn't validate against slug_re

[Mike Fogel]

This appears to be a bug to me:

from django.db import models

class MyModel(models.Model):
    slug = models.SlugField()

mymodel = MyModel(slug='this is an invalid % $ ## slug')
mymodel.full_clean() # it'd expect this to raise a validation error... it does not.

[Baptiste Mispelon]

PR here: ​https://github.com/django/django/pull/1267

I also included some cleanup of the URLField validators.
Since 9ed6e08ff99c18710c0e4875f827235f04c89d76, the URLField (both model and form field) validator doesn't depend on a parameter passed in __init__ so it can be added directly to URLField.default_validators.

[Tim Graham <timograham@…>]

In dc9c359546580d40df209816cef244b78dcf7435:

Fixed #20594 -- Add validation to models.SlugField.

Thanks carbonXT for the report.