CODEWITHSUNDEEP
djangodjango-forms
Garfonzo
Garfonzo

Reputation: 3966

Django Select field - change what is displayed

I have a ModelForm which is rendering a select field because it points to a ForeignKey. When the form is rendered, it's displaying the options based the ForeignKey's __unicode__ definition.

For example, I have a select field in a form to pick a contact from a Contact model. The Contact model has:

def __unicode__(self):
  return self.first_name

Thus, my list of contacts in my select field only show first names.

I know I could just change the __unicode__ definition, but I want to know how to change what is presented int the select options based on where that select field is presented. In other words, in some forms, I need to show something like:

{{ contact.first_name}} -- {{ contact.phone_number }}

and in other areas I want to show just:

{{ contact.first_name }}

How do I go about adjusting the ModelForm so that that specific field, the select field which is pointing to the ForeignKey model Contact displays the full name of the contact?

Upvotes: 2

Views: 1226

Answers (1)

Tiny Instance
Tiny Instance

Reputation: 2671

As I understand this is a ModelChoiceField so you can override the label_from_instance. Docs for reference.

class YourNewChoiceField(ModelChoiceField):
    def label_from_instance(self, obj):
        return "%s -- %s" % (obj.name, obj.phone_number)

Inside the form use your new field. 

class YourForm(ModelForm)
    # As you'd normally define your ModelChoiceField field
    contact = YourNewChoiceField(queryset=...) 

    class Meta:
        fields = ['contact', ...]

Upvotes: 4

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