I have two models related by a foreign key:

# models.py    
class TestSource(models.Model):
  name        = models.CharField(max_length=100)

class TestModel(models.Model):
  name        = models.CharField(max_length=100)
  attribution = models.ForeignKey(TestSource, null=True)

By default, a django ModelForm will present this as a <select> with <option>s; however I would prefer that this function as a free form input, <input type="text"/>, and behind the scenes get or create the necessary TestSource object and then relate it to the TestModel object.

I have tried to define a custom ModelForm and Field to accomplish this:

# forms.py
class TestField(forms.TextInput):
  def to_python(self, value):
    return TestSource.objects.get_or_create(name=value)

class TestForm(ModelForm):
  class Meta:
    model=TestModel
    widgets = {
      'attribution' : TestField(attrs={'maxlength':'100'}),
    }

Unfortunately, I am getting: invalid literal for int() with base 10: 'test3' when attempting to check is_valid on the submitted form. Where am I going wrong? Is their and easier way to accomplish this?

django django-models django-forms
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