139 lines
4.8 KiB
Python
139 lines
4.8 KiB
Python
from datetime import datetime
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from django.core.exceptions import ValidationError
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from django.db import models
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from django.db.models.functions import Lower
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def validate_answer_to_universe(value):
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if value != 42:
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raise ValidationError('This is not the answer to life, universe and everything!', code='not42')
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class ModelToValidate(models.Model):
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name = models.CharField(max_length=100)
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created = models.DateTimeField(default=datetime.now)
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number = models.IntegerField(db_column='number_val')
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parent = models.ForeignKey(
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'self',
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models.SET_NULL,
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blank=True, null=True,
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limit_choices_to={'number': 10},
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)
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email = models.EmailField(blank=True)
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ufm = models.ForeignKey(
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'UniqueFieldsModel',
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models.SET_NULL,
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to_field='unique_charfield',
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blank=True, null=True,
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)
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url = models.URLField(blank=True)
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f_with_custom_validator = models.IntegerField(blank=True, null=True, validators=[validate_answer_to_universe])
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f_with_iterable_of_validators = models.IntegerField(blank=True, null=True,
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validators=(validate_answer_to_universe,))
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slug = models.SlugField(blank=True)
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def clean(self):
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super().clean()
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if self.number == 11:
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raise ValidationError('Invalid number supplied!')
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class UniqueFieldsModel(models.Model):
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unique_charfield = models.CharField(max_length=100, unique=True)
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unique_integerfield = models.IntegerField(unique=True)
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non_unique_field = models.IntegerField()
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class CustomPKModel(models.Model):
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my_pk_field = models.CharField(max_length=100, primary_key=True)
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class UniqueTogetherModel(models.Model):
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cfield = models.CharField(max_length=100)
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ifield = models.IntegerField()
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efield = models.EmailField()
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class Meta:
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unique_together = (('ifield', 'cfield',), ['ifield', 'efield'])
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class UniqueForDateModel(models.Model):
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start_date = models.DateField()
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end_date = models.DateTimeField()
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count = models.IntegerField(unique_for_date="start_date", unique_for_year="end_date")
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order = models.IntegerField(unique_for_month="end_date")
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name = models.CharField(max_length=100)
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class CustomMessagesModel(models.Model):
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other = models.IntegerField(blank=True, null=True)
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number = models.IntegerField(
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db_column='number_val',
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error_messages={'null': 'NULL', 'not42': 'AAARGH', 'not_equal': '%s != me'},
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validators=[validate_answer_to_universe]
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)
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class AuthorManager(models.Manager):
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def get_queryset(self):
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qs = super().get_queryset()
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return qs.filter(archived=False)
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class Author(models.Model):
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name = models.CharField(max_length=100)
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archived = models.BooleanField(default=False)
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objects = AuthorManager()
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class Article(models.Model):
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title = models.CharField(max_length=100)
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author = models.ForeignKey(Author, models.CASCADE)
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pub_date = models.DateTimeField(blank=True)
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def clean(self):
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if self.pub_date is None:
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self.pub_date = datetime.now()
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class Post(models.Model):
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title = models.CharField(max_length=50, unique_for_date='posted', blank=True)
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slug = models.CharField(max_length=50, unique_for_year='posted', blank=True)
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subtitle = models.CharField(max_length=50, unique_for_month='posted', blank=True)
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posted = models.DateField()
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class FlexibleDatePost(models.Model):
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title = models.CharField(max_length=50, unique_for_date='posted', blank=True)
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slug = models.CharField(max_length=50, unique_for_year='posted', blank=True)
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subtitle = models.CharField(max_length=50, unique_for_month='posted', blank=True)
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posted = models.DateField(blank=True, null=True)
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class UniqueErrorsModel(models.Model):
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name = models.CharField(max_length=100, unique=True, error_messages={'unique': 'Custom unique name message.'})
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no = models.IntegerField(unique=True, error_messages={'unique': 'Custom unique number message.'})
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class GenericIPAddressTestModel(models.Model):
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generic_ip = models.GenericIPAddressField(blank=True, null=True, unique=True)
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v4_ip = models.GenericIPAddressField(blank=True, null=True, protocol="ipv4")
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v6_ip = models.GenericIPAddressField(blank=True, null=True, protocol="ipv6")
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ip_verbose_name = models.GenericIPAddressField("IP Address Verbose", blank=True, null=True)
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class GenericIPAddrUnpackUniqueTest(models.Model):
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generic_v4unpack_ip = models.GenericIPAddressField(null=True, blank=True, unique=True, unpack_ipv4=True)
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class UniqueFuncConstraintModel(models.Model):
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field = models.CharField(max_length=255)
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class Meta:
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required_db_features = {'supports_expression_indexes'}
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constraints = [
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models.UniqueConstraint(Lower('field'), name='func_lower_field_uq'),
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]
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