Django - Assign default value to field in ModelForm
django, python
Solution
I managed to solve the issue in a way that makes me satisfied, although I'm still not 100% happy with the code.
`a_field` is a required (by the model) field, thus it is necessary to render an `<input name="a_field">` inside the template. The trick was to make `a_field` non-required:
class AForm(ModelForm):
a_field = Field(required=False,
widget=forms.HiddenInput)
class Meta:
model = AModel
def clean_a_field(self):
return 10
This way I can avoid rendering the field in my template, and the form will still validate. And even if the form is rendered with `{{ form.as_p }}`, `widget=forms.HiddenInput` saves my day.
Problem
In my application I have a `CreateView` that must initialize some fields of the model with a default value, different from the default defined inside the model. I do not want the user to edit the value, thus I put the field in the `exclude` list ``` class AForm(ModelForm): class Meta: model = AModel exclude = ['a_field'] class AView(CreateView): form_class = AForm ``` The question is: where do I set the value of `a_field`? I tried to define `clean` methods inside `AForm`, like thus ``` class AForm(ModelForm): [...] def clean(self): d = super(AForm, self).clean() d['a_field'] = 10 return d ``` however `a_field` is set to whatever its default value defined in the model is, rather than `10`. I also tried defining `clean_a_field`, but that is simply not executed. If I remove `a_field` from the `exclude` list, then the `clean` and `clean_a_field` will work, but the form won't validate unless I render some `<input name="a_field">` inside the template, which is not optimal.