I went through django/contrib/auth/models.py to check the definition
of the User model. I don't see this file defining any restrictions on
what a username can be. So, I think the form is the place (and
possibly the only place) which defines and enforces restrictions on
what the username can be.
Interestingly, the help_text for User.username is the following:
help_text=_('Required. 30 characters or fewer. Letters,
numbers and '
'@/./+/-/_ characters'))
But this restriction in neither defined nor enforced in the User model
class.
> isn't it supposed to be automatic, coming from the restrictions of the model
> since it's a ModelForm?
I didn't understand this comment. Why would you think ModelForm has
anything to do with it? As in, why would ModelForm know anything about
User.username.
thanks,
-pavan
On Apr 10, 12:53 am, Bastian <bastien.roche...@gmail.com> wrote:
> Yes that's what I ended up doing but isn't it supposed to be automatic,
> coming from the restrictions of the model since it's a ModelForm?
>
> On Thursday, April 5, 2012 7:51:14 PM UTC+2, Pavan Verma wrote:
>
> > Hi Bastian,
> > you need to define the restrictions on the username field. It can be
> > done by including the code below inside usernameForm. This code is
> > from django/contrib/auth/forms.py -> UserCreationForm, you can refer
> > it to understand further.
>
> > username = forms.RegexField(label="Username", max_length=30,
> > regex=r'^[\w.@+-]+$',
> > help_text="Required. 30 characters or fewer. Letters, digits
> > and "
> > "@/./+/-/_ only.",
> > error_messages={
> > 'invalid': "This value may contain only letters, numbers
> > and "
> > "@/./+/-/_ characters."})
>
> > thanks,
> > -pavan
>
> > On Apr 4, 7:36 pm, Bastian <bastien.roche...@gmail.com> wrote:
> > > Hi,
>
> > > I have a form that asks the registering user to choose a username. That
> > > form is a ModelForm based on the django.contrib.auth.models Users:
>
> > > class usernameForm(forms.ModelForm):
> > > class Meta:
> > > model = User
> > > fields = ('username', )
>
> > > The strange thing is that when it appears on the page it comes with the
> > > warning that says no more than 30 characters... but it actually does not
> > > check anything. I tried to enter whatever username, with spaces and ()
> > and
> > > in the view when I ask if form.is_valid() it returns True all the time!
>
> > > Obviously this must be a mistake on my side somewhere but on such a
> > simple
> > > setup I don't see where I am wrong, any idea welcome.
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