[Answer]-Django CRUD admin view: return error message

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0👍

✅

Thanks to @FernandoFreitasAlves I could write a solution.
I realised that my model can also be loaded from a file and then stored in the DB, without the CRUD admin page, so I also overide the save() method.

def save(self, *args, **kwargs):
    xml = "<screen>" + self.content + "</screen>"
    parseString(xml.encode("utf-8"))
    super(Screen, self).save(*args, **kwargs)

def clean(self):
    try:
        from xml.dom.minidom import parseString
        doc = parseString(self.content)
    except Exception, e:
        from django import forms
        raise forms.ValidationError("It's not a XML")
    super(Screen,self).clean()

I think I don’t want to overide the full_clean() method. I can’t see a reason for that. The docs (https://docs.djangoproject.com/en/dev/ref/models/instances/#django.db.models.Model.full_clean) say

This method calls Model.clean_fields(), Model.clean(), and
Model.validate_unique(), in that order and raises a ValidationError
that has a message_dict attribute containing errors from all three
stages.

👤Eduard Gamonal

1👍

I think you may use the clean method inside your models, in that way you will validate your data in the admin, just like the other admin fields

Inside your Model:

def clean(self):
   try:
        from xml.dom.minidom import parseString
        doc = parseString(self.content)

    except Exception, e:
        from django import forms
        raise forms.ValidationError(u"It's not a XML")

    super(YourModel,self).clean()

def full_clean(self, exclude=None):
    return self.clean()

reference: https://docs.djangoproject.com/en/dev/ref/models/instances/#django.db.models.Model.clean_fields

👤Fernando Freitas Alves

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