Adding Custom Django Model Validation

Question

I have a Django model with a start and end date range. I want to enforce validation so that no two records have overlapping date ranges. What\'s the simplest way to implemen

Answer 1

I think this can help you, We can create multiple validators like this use in models.

from django.core.exceptions import ValidationError
from django.utils.translation import gettext_lazy as _
from django.db import models

def validate_even(value):
    if value % 2 != 0:
        raise ValidationError(
            _('%(value)s is not an even number'),
            params={'value': value},
        )

class MyModel(models.Model):
    even_field = models.IntegerField(validators=[validate_even])