from django.core.validators import RegexValidator
class PhoneModel(models.Model):
...
phone_regex = RegexValidator(regex=r'^+?1?d{9,15}$', message="Phone number must be entered in the format: '+999999999'. Up to 15 digits allowed.")
phone_number = models.CharField(validators=[phone_regex], max_length=17, blank=True) # validators should be a list
from django.core.validators import RegexValidator
class Person(models.Model):
phoneNumberRegex = RegexValidator(regex = r"^+?1?d{8,15}$")
phoneNumber = models.CharField(validators = [phoneNumberRegex], max_length = 16, unique = True)