Django: How can I delete a formset entry if one of it's data is blank?

Posted by mkret on Stack Overflow See other posts from Stack Overflow or by mkret
Published on 2010-05-17T22:13:36Z Indexed on 2010/05/17 22:20 UTC
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Hi,

I have the following scenario: I have a form with data that does not need translation and a formset with a textfield that should be translated into an undefined amount of languages.

Both parts are bound to a model. Each translated text is kept in a model with a foreign key that binds it to the untranslatable data. Something like:

class Person(models.Model):
    name = models.CharField(max_length=60)
    birth_date = models.DateField()

class PersonBio(models.Model):
    person = models.ForeignKey(Person)
    locale = models.CharField(max_length=10)
    bio = models.TextField()

Each form in the formset has 2 fields:

  • A textfield (with the translated text)
  • A locale field (with the language into which the text was translated)

I've got it working with no problems until I tryed to change it's normal behaviour. I wanted to eliminate the need for the DELETE field by deleting an instance of the translated text if the textfield was left blank.

I've googled quite a lot now and read the whole documentation for forms, formsets and model validation but had no luck. To be honest, I couldn't even think of a solution.

Where should I implement this? On a Form clean() method? On the view? Somewhere in the Fieldset? Fieldset's save() method, maybe?

I'll keep trying to find a way to do that, but any help/tip/clue is appreciated.

Thanks in advance.

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