CODEWITHSUNDEEP
django
DSteman
DSteman

Reputation: 1658

Django custom field has no attribute 'set_attributes_from_name'

I have a custom field to convert the input date to a timedelta in years, rounded up:

class CustomField(models.Model):
    start_date = models.DateField()

    def days_to_years(self, date: timedelta):
        return math.ceil(date.days / 365)

    def save(self, *args, **kwargs):
        delta = datetime.today() - self.start_date
        self.start_date = math.ceil(delta.days / 365)
        super(CustomField, self).save(*args, **kwargs)

Which I use in models like:

from django.contrib.postgres.fields import ArrayField

class Component(ComponentBase):
    years = ArrayField(
            CustomField()
    )

When I try to make migrations, the error AttributeError: 'CustomField' object has no attribute 'set_attributes_from_name is raised, which I can't seem to debug because I'm still quite fresh to Django. Any suggestions would be very welcoming :).

Upvotes: 1

Views: 480

Answers (1)

Roman B.
Roman B.

Reputation: 187

If you want your own custom field it should be a subclass of models.Field, not models.Model.

Upvotes: 0

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