83👍
You can setup a custom ModelChoiceField
that will return whatever label you’d like.
Place something like this within a fields.py or wherever applicable.
class UserModelChoiceField(ModelChoiceField):
def label_from_instance(self, obj):
return obj.get_full_name()
Then when creating your form, simply use that field
UserModelChoiceField(queryset=User.objects.filter(is_staff=False), required = False)
More info can be found here
36👍
When working with a ModelForm, I found the following most useful so that I didn’t have to redefine my queryset – in particular because I used limit_choices_to in the model definition:
class MyModelForm(forms.ModelForm):
def __init__(self, *args, **kwargs):
super(MyModelForm, self).__init__(*args, **kwargs)
self.fields['user'].label_from_instance = lambda obj: "%s" % obj.get_full_name()
customised from this answer https://stackoverflow.com/a/7805824/432992
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2👍
You can override the field with a custom ModelChoiceField
and change the label_from_instance
function to return get_full_name
instead. See the docs for ModelChoiceField
: http://docs.djangoproject.com/en/1.2/ref/forms/fields/#modelchoicefield
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2👍
If you want to change choices of the field in model form, try this adaptation of the Bartek’s answer:
model:
class MyModel(models.Model)
user = models.ForeignKey(...)
form field:
class UserModelChoiceField(forms.ModelChoiceField):
def label_from_instance(self, obj):
return obj.get_full_name()
form:
class MyModelForm(forms.ModelForm):
class Meta:
model = MyModel
fields = ['user']
field_classes = {
'user': UserModelChoiceField
}
This approach will preserve params of the field (you don’t need to specify queryset
, required
and so on).
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0👍
You can also make one custom ModelChoiceField to which you can pass a function. That way if you have different fields for which you want different attributes to be displayed, you can have only 1 class:
class CustomModelChoiceField(forms.ModelChoiceField):
name_function = staticmethod(lambda obj: obj)
def __init__(self, name_function, *args, **kwargs):
if not name_function is None: self.name_function = name_function
super(CustomModelChoiceField, self).__init__(*args, **kwargs)
def label_from_instance(self, obj):
return self.name_function(obj);
You can then call it as simply as this:
form_field = CustomModelChoiceField(
lambda obj: obj.get_full_name(),
queryset=Whatever.objects.all(),
)
You can also pass None in case you’re doing some dynamic stuff and it’ll just basically default to a regular ModelChoiceField. I’m not too much of a python guy but this works for me.
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