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django/tests/constraints/models.py
2022-02-07 20:37:05 +01:00

127 lines
3.7 KiB
Python

from django.db import models
class Product(models.Model):
price = models.IntegerField(null=True)
discounted_price = models.IntegerField(null=True)
unit = models.CharField(max_length=15, null=True)
class Meta:
required_db_features = {
"supports_table_check_constraints",
}
constraints = [
models.CheckConstraint(
check=models.Q(price__gt=models.F("discounted_price")),
name="price_gt_discounted_price",
),
models.CheckConstraint(
check=models.Q(price__gt=0),
name="%(app_label)s_%(class)s_price_gt_0",
),
models.CheckConstraint(
check=models.expressions.RawSQL(
"price < %s", (1000,), output_field=models.BooleanField()
),
name="%(app_label)s_price_lt_1000_raw",
),
models.CheckConstraint(
check=models.expressions.ExpressionWrapper(
models.Q(price__gt=500) | models.Q(price__lt=500),
output_field=models.BooleanField(),
),
name="%(app_label)s_price_neq_500_wrap",
),
models.CheckConstraint(
check=models.Q(
models.Q(unit__isnull=True) | models.Q(unit__in=["μg/mL", "ng/mL"])
),
name="unicode_unit_list",
),
]
class UniqueConstraintProduct(models.Model):
name = models.CharField(max_length=255)
color = models.CharField(max_length=32, null=True)
class Meta:
constraints = [
models.UniqueConstraint(fields=["name", "color"], name="name_color_uniq"),
]
class UniqueConstraintConditionProduct(models.Model):
name = models.CharField(max_length=255)
color = models.CharField(max_length=32, null=True)
class Meta:
required_db_features = {"supports_partial_indexes"}
constraints = [
models.UniqueConstraint(
fields=["name"],
name="name_without_color_uniq",
condition=models.Q(color__isnull=True),
),
]
class UniqueConstraintDeferrable(models.Model):
name = models.CharField(max_length=255)
shelf = models.CharField(max_length=31)
class Meta:
required_db_features = {
"supports_deferrable_unique_constraints",
}
constraints = [
models.UniqueConstraint(
fields=["name"],
name="name_init_deferred_uniq",
deferrable=models.Deferrable.DEFERRED,
),
models.UniqueConstraint(
fields=["shelf"],
name="sheld_init_immediate_uniq",
deferrable=models.Deferrable.IMMEDIATE,
),
]
class UniqueConstraintInclude(models.Model):
name = models.CharField(max_length=255)
color = models.CharField(max_length=32, null=True)
class Meta:
required_db_features = {
"supports_table_check_constraints",
"supports_covering_indexes",
}
constraints = [
models.UniqueConstraint(
fields=["name"],
name="name_include_color_uniq",
include=["color"],
),
]
class AbstractModel(models.Model):
age = models.IntegerField()
class Meta:
abstract = True
required_db_features = {
"supports_table_check_constraints",
}
constraints = [
models.CheckConstraint(
check=models.Q(age__gte=18),
name="%(app_label)s_%(class)s_adult",
),
]
class ChildModel(AbstractModel):
pass