Field forced to not-null

[Phlip Pretorius]

Hallo,

I have created a model that looks like this:

========================================================

class ActionType(models.Model):
    """The type of actions that must be taken at a meeting with respect to
    agenda points e.g. 'Decide', 'Take Note'etc.

    """
    AtpCode = models.CharField(max_length=4)
    AtpDesc = models.CharField(max_length=80, null=False)
    Active = models.CharField(max_length=1, null=True)

    class Meta:
        unique_together = (('AtpCode'),)

    def __str__(self):
        """Return a string representation of the model"""
        return self.AtpCode
========================================================

I am using SQLite as I am developing.

When I deploy this model to SQLite, the Active field is forced to be non-null although explicitly indicate the null=True.

Any idea why this is happening? I have deleted the complete Django project and started from scratch only to find the same scenario; when I click save, I get the following message.

Any advice will be welcomed.

Regards,

Phlip

[Andréas Kühne]

Hi Philip,

The field is required because you haven't allowed it to be blank - and django admin requires fields to have the following attributes if you don't require them:

Active = models.CharField(max_length=1, null=True, blank=True)

Otherwise the GUI will mark the field as required.

See here: https://docs.djangoproject.com/en/2.1/ref/models/fields/#blank

Regards,

Andréas

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[Jason]

A good thing to keep in mind is null is for the database, and blank is for django validation

[Phlip Pretorius]

Thank you Andréas and Jason

That solved my problem

Regards,

Phlip

Regards,

Andréas

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