django: order and show name conflict.

Question

Hey; i have a model using user as a forgignKey. and in the admin, i need it show as full name instread of username. then i applied

class CollaboratorInLine(admin.StackedInline):
    model = Collaborator
    #list_display = ('collaborator__collaborator_first_name')
    extra = 0
    form =CollaboratorForm
    #raw_id_fields=("collaborator",)

    def formfield_for_foreignkey(self, db_field, request=None, **kwargs):
        field = super(CollaboratorInLine, self).formfield_for_foreignkey(
                                                db_field, request, **kwargs)
        if db_field.rel.to == User:
            field.label_from_instance = self.get_user_label
        return field
    def formfield_for_manytomany(self, db_field, request=None, **kwargs):
        field = super(CollaboratorInLine, self).formfield_for_manytomany(
                                                db_field, request, **kwargs)
        if db_field.rel.to == User:
            field.label_from_instance = self.get_user_label
        return field
    def get_user_label(self, user):   
        name = user.get_full_name()  
        return name

it works fine as a dropdown list with fullnames. then i want to sort them in alphabetical order. then i appplied

class CollaboratorForm(forms.ModelForm):
    collaborator = forms.ModelChoiceField(queryset=User.objects.order_by('first_name'))
    #assert False,collaborator
    class Meta:
        model = Collaborator

as this applied. the full names becomes username again. if i remove it, it becomes full names. so how can i keep both features?

thanks

Answer 1

Try subclassing ModelChoiceField and override the label_for_instance method to display the full name.

class MyModelChoiceField(ModelChoiceField): 
    def label_from_instance(self, obj): 
        return obj.get_full_name()

Then use the new field in your model form.

class CollaboratorForm(forms.ModelForm):
        collaborator = MyModelChoiceField(queryset=User.objects.order_by('first_name'))
        #assert False,collaborator
        class Meta:
            model = Collaborator