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from datetime import datetime
from django.core.exceptions import ValidationError
from django.core.validators import ComplexValidator
from django.db import models
from django.test import TestCase
def validate_answer_to_universe(value):
if value != 42:
raise ValidationError('This is not the answer to life, universe and everything!', code='not42')
class ValidateFieldNotEqualsOtherField(ComplexValidator):
def __init__(self, other_field):
self.other_field = other_field
def __call__(self, value, all_values={}, obj=None):
if value == self.get_value(self.other_field, all_values, obj):
raise ValidationError("Must not equal to %r's value" % self.other_field, code='not_equal', params=(self.other_field,))
class ModelToValidate(models.Model):
name = models.CharField(max_length=100)
created = models.DateTimeField(default=datetime.now)
number = models.IntegerField()
parent = models.ForeignKey('self', blank=True, null=True)
email = models.EmailField(blank=True)
url = models.URLField(blank=True)
f_with_custom_validator = models.IntegerField(blank=True, null=True, validators=[validate_answer_to_universe, ValidateFieldNotEqualsOtherField('number')])
def validate(self):
super(ModelToValidate, self).validate()
if self.number == 11:
raise ValidationError('Invalid number supplied!')
class UniqueFieldsModel(models.Model):
unique_charfield = models.CharField(max_length=100, unique=True)
unique_integerfield = models.IntegerField(unique=True)
non_unique_field = models.IntegerField()
class CustomPKModel(models.Model):
my_pk_field = models.CharField(max_length=100, primary_key=True)
class UniqueTogetherModel(models.Model):
cfield = models.CharField(max_length=100)
ifield = models.IntegerField()
efield = models.EmailField()
class Meta:
unique_together = (('ifield', 'cfield',),('ifield', 'efield'), )
class UniqueForDateModel(models.Model):
start_date = models.DateField()
end_date = models.DateTimeField()
count = models.IntegerField(unique_for_date="start_date", unique_for_year="end_date")
order = models.IntegerField(unique_for_month="end_date")
name = models.CharField(max_length=100)
class CustomMessagesModel(models.Model):
other = models.IntegerField(blank=True, null=True)
number = models.IntegerField(
error_messages={'null': 'NULL', 'not42': 'AAARGH', 'not_equal': '%s != me'},
validators=[validate_answer_to_universe, ValidateFieldNotEqualsOtherField('other')]
)
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