Hello Django Community,
Let me explain what I'm doing:
When using ModelForm to generate forms I frequently added the same
widget/parameters to fields. I love the flexability to be able to do
this but find it very repetitive if I'm adding the same widget and/or
options to a field on several forms. To avoid this situation I have
subclassed fields and assigned them widgets with standard options.
The question:
Other than requiring my custom fields/widgets be available to my
applications what are the other reasons this is a good/bad practice?
The simplest example is for a password field. By default its a
CharField and I want to assign the PasswordInput widget and set
render_value=False). So rather than assign the widget at the form
level I'd prefer to set it at the model level with something like.
class PasswordField(models.CharField):
"""
PasswordField
This allows be to subclass a CharField and sets it up to use the
password
widget.
"""
def formfield(self, *args, **kwargs):
kwargs['widget'] = PasswordInput(render_value=False)
return super(PasswordField, self).formfield(**kwargs)
I prefer this to setting the widget in the form because I use auto
generated forms with a simple management tool. Checking to see if a
custom form exists is easy enough to do but for almost all cases this
seems to be more DRY to me. Another example is for HTMLField with a
custom widget that subclasses TextField. I use a RTEditor for
HTMLField and use them in a lot of places but in reality it's a
TextField with a custom widget. Should I be doing this in the forms
instead of the models? Is this a poor way to design things? Is
creating default presentation behaviors for fields bad and does it
violate MTV?
Thanks for Feedback,
Mark
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