First the code:
class CommentForm(forms.ModelForm):
categories = forms.ModelChoiceField(queryset = Category.objects.all(), required = False)
class CommentAdmin(admin.ModelAdmin):
form = CommentForm
When I'm editing my comment I'd like it categories field have the initial value of what's been selected when I saved it for the last time. How do I do that?
def get_form(self, *args, **kwargs):
f = super(CommentAdmin, self).get_form(*args, **kwargs)
f.base_fields['categories'].initial = 1
return f
This code placed in CommentAdmin did the trick...
EDIT:
def __init__(self, *args, **kwargs):
super(CommentForm, self).__init__(*args, **kwargs)
self.fields['categories'].initial = self.instance.object_id
Or this code placed in CommentForm
You want to have the current model value selected by default in the generated form? If that's the case I think what you are looking for in your view is
form = CommentForm(instance = commentinstance)
Where commentinstance
is the instance that you are editing.
(This would be form = CommentForm(request.POST, instance = commentinstance)
in case of a POST request)
EDIT :
If you want to do this in the form, you can just provide the instance
argument from __init__
, like so:
def __init__(self, *args, **kwargs):
instance = kwargs.pop('instance', YOUR_DEFAULT_INSTANCE)
super(CommentForm, self).__init__(instance = instance, *args, **kwargs)
That even leaves the default instance
if you do provide one from your view.
I guess there are a few ways to solve this.
Here is how I done before:
class MyForm(forms.ModelForm):
def __init__(self, *args, **kwargs):
if 'ref' in kwargs:
ref = kwargs['ref']
item = MyModel.objects.get(pk=ref)
kwargs['instance'] = item
super(MyForm, self).__init__(*args, **kwargs)
class Meta:
model = MyModel
The important part is to put your populated model object into the keyword variable instance.
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