django models.DateField prevent past

Question

I am looking for ways to prevent user from entering past dates in in django admin page. Something like this:

Django: How to set DateField to only accept Today & Future dates

My model looks like this:

class MyModel(models.Model):
    date = models.DateField(null=True, blank=True, default=None)

Answer 1

The correct way to do this is a validator. For example:

def validate_date(date):
    if date < timezone.now().date():
        raise ValidationError("Date cannot be in the past")

That function will determine whether a particular input value is acceptable, then you can add the validator to the model field like so:

date = models.DateField(null=True, blank=True, default=None, validators=[validate_date])