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Refs #11964 -- Changed CheckConstraint() signature to use keyword-only arguments. 

Also renamed the `constraint` argument to `check` to better represent which
part of the constraint the provided `Q` object represents.
This commit is contained in:
Simon Charette 2018-08-05 22:15:10 -04:00 committed by Tim Graham
parent 0bf7b25f8f
commit 9142bebff2
9 changed files with 34 additions and 34 deletions
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12
django/db/models/constraints.py
View File

@ -4,13 +4,13 @@ __all__ = ['CheckConstraint']
class CheckConstraint:
def __init__(self, constraint, name):
self.constraint = constraint
def __init__(self, *, check, name):
self.check = check
self.name = name
def constraint_sql(self, model, schema_editor):
query = Query(model)
where = query.build_where(self.constraint)
where = query.build_where(self.check)
connection = schema_editor.connection
compiler = connection.ops.compiler('SQLCompiler')(query, connection, 'default')
sql, params = where.as_sql(compiler, connection)
@ -35,19 +35,19 @@ class CheckConstraint:
}
def __repr__(self):
return "<%s: constraint='%s' name='%s'>" % (self.__class__.__name__, self.constraint, self.name)
return "<%s: check='%s' name=%r>" % (self.__class__.__name__, self.check, self.name)
def __eq__(self, other):
return (
isinstance(other, CheckConstraint) and
self.name == other.name and
self.constraint == other.constraint
self.check == other.check
)
def deconstruct(self):
path = '%s.%s' % (self.__class__.__module__, self.__class__.__name__)
path = path.replace('django.db.models.constraints', 'django.db.models')
return (path, (), {'constraint': self.constraint, 'name': self.name})
return (path, (), {'check': self.check, 'name': self.name})
def clone(self):
_, args, kwargs = self.deconstruct()

14
docs/ref/models/check-constraints.txt
View File

@ -23,20 +23,20 @@ explains the API references of :class:`CheckConstraint`.
``CheckConstraint`` options
===========================
.. class:: CheckConstraint(constraint, name)
.. class:: CheckConstraint(*, check, name)
Creates a check constraint in the database.
``constraint``
--------------
``check``
---------
.. attribute:: CheckConstraint.constraint
.. attribute:: CheckConstraint.check
A :class:`Q` object that specifies the condition you want the constraint to
A :class:`Q` object that specifies the check you want the constraint to
enforce.
For example ``CheckConstraint(Q(age__gte=18), 'age_gte_18')`` ensures the age
field is never less than 18.
For example ``CheckConstraint(check=Q(age__gte=18), name='age_gte_18')``
ensures the age field is never less than 18.
``name``
--------

2
docs/ref/models/options.txt
View File

@ -469,7 +469,7 @@ Django quotes column and table names behind the scenes.
class Meta:
constraints = [
models.CheckConstraint(models.Q(age__gte=18), 'age_gte_18'),
models.CheckConstraint(check=models.Q(age__gte=18), name='age_gte_18'),
]
``verbose_name``

6
tests/constraints/models.py
View File

@ -9,7 +9,7 @@ class Product(models.Model):
class Meta:
constraints = [
models.CheckConstraint(
models.Q(price__gt=models.F('discounted_price')),
'price_gt_discounted_price'
)
check=models.Q(price__gt=models.F('discounted_price')),
name='price_gt_discounted_price',
),
]

16
tests/constraints/tests.py
View File

@ -6,22 +6,22 @@ from .models import Product
class CheckConstraintTests(TestCase):
def test_repr(self):
constraint = models.Q(price__gt=models.F('discounted_price'))
check = models.Q(price__gt=models.F('discounted_price'))
name = 'price_gt_discounted_price'
check = models.CheckConstraint(constraint, name)
constraint = models.CheckConstraint(check=check, name=name)
self.assertEqual(
repr(check),
"<CheckConstraint: constraint='{}' name='{}'>".format(constraint, name),
repr(constraint),
"<CheckConstraint: check='{}' name='{}'>".format(check, name),
)
def test_deconstruction(self):
constraint = models.Q(price__gt=models.F('discounted_price'))
check = models.Q(price__gt=models.F('discounted_price'))
name = 'price_gt_discounted_price'
check = models.CheckConstraint(constraint, name)
path, args, kwargs = check.deconstruct()
constraint = models.CheckConstraint(check=check, name=name)
path, args, kwargs = constraint.deconstruct()
self.assertEqual(path, 'django.db.models.CheckConstraint')
self.assertEqual(args, ())
self.assertEqual(kwargs, {'constraint': constraint, 'name': name})
self.assertEqual(kwargs, {'check': check, 'name': name})
@skipUnlessDBFeature('supports_table_check_constraints')
def test_database_constraint(self):

2
tests/invalid_models_tests/test_models.py
View File

@ -1003,7 +1003,7 @@ class ConstraintsTests(SimpleTestCase):
age = models.IntegerField()
class Meta:
constraints = [models.CheckConstraint(models.Q(age__gte=18), 'is_adult')]
constraints = [models.CheckConstraint(check=models.Q(age__gte=18), name='is_adult')]
errors = Model.check()
warn = Warning(

8
tests/migrations/test_autodetector.py
View File

@ -65,7 +65,7 @@ class AutodetectorTests(TestCase):
("id", models.AutoField(primary_key=True)),
("name", models.CharField(max_length=200)),
],
{'constraints': [models.CheckConstraint(models.Q(name__contains='Bob'), 'name_contains_bob')]},
{'constraints': [models.CheckConstraint(check=models.Q(name__contains='Bob'), name='name_contains_bob')]},
)
author_dates_of_birth_auto_now = ModelState("testapp", "Author", [
("id", models.AutoField(primary_key=True)),
@ -1399,9 +1399,9 @@ class AutodetectorTests(TestCase):
author = ModelState('otherapp', 'Author', [
('id', models.AutoField(primary_key=True)),
('name', models.CharField(max_length=200)),
], {'constraints': [models.CheckConstraint(models.Q(name__contains='Bob'), 'name_contains_bob')]})
], {'constraints': [models.CheckConstraint(check=models.Q(name__contains='Bob'), name='name_contains_bob')]})
changes = self.get_changes([], [author])
added_constraint = models.CheckConstraint(models.Q(name__contains='Bob'), 'name_contains_bob')
added_constraint = models.CheckConstraint(check=models.Q(name__contains='Bob'), name='name_contains_bob')
# Right number of migrations?
self.assertEqual(len(changes['otherapp']), 1)
# Right number of actions?
@ -1417,7 +1417,7 @@ class AutodetectorTests(TestCase):
changes = self.get_changes([self.author_name], [self.author_name_check_constraint])
self.assertNumberMigrations(changes, 'testapp', 1)
self.assertOperationTypes(changes, 'testapp', 0, ['AddConstraint'])
added_constraint = models.CheckConstraint(models.Q(name__contains='Bob'), 'name_contains_bob')
added_constraint = models.CheckConstraint(check=models.Q(name__contains='Bob'), name='name_contains_bob')
self.assertOperationAttributes(changes, 'testapp', 0, 0, model_name='author', constraint=added_constraint)
def test_remove_constraints(self):

6
tests/migrations/test_operations.py
View File

@ -110,7 +110,7 @@ class OperationTestBase(MigrationTestBase):
if check_constraint:
operations.append(migrations.AddConstraint(
"Pony",
models.CheckConstraint(models.Q(pink__gt=2), name="pony_test_constraint")
models.CheckConstraint(check=models.Q(pink__gt=2), name="pony_test_constraint")
))
if second_model:
operations.append(migrations.CreateModel(
@ -471,7 +471,7 @@ class OperationTests(OperationTestBase):
@skipUnlessDBFeature('supports_table_check_constraints')
def test_create_model_with_constraint(self):
where = models.Q(pink__gt=2)
check_constraint = models.CheckConstraint(where, name='test_constraint_pony_pink_gt_2')
check_constraint = models.CheckConstraint(check=where, name='test_constraint_pony_pink_gt_2')
operation = migrations.CreateModel(
"Pony",
[
@ -1782,7 +1782,7 @@ class OperationTests(OperationTestBase):
project_state = self.set_up_test_model('test_addconstraint')
where = models.Q(pink__gt=2)
check_constraint = models.CheckConstraint(where, name='test_constraint_pony_pink_gt_2')
check_constraint = models.CheckConstraint(check=where, name='test_constraint_pony_pink_gt_2')
operation = migrations.AddConstraint('Pony', check_constraint)
self.assertEqual(operation.describe(), 'Create constraint test_constraint_pony_pink_gt_2 on model Pony')

2
tests/migrations/test_state.py
View File

@ -1143,7 +1143,7 @@ class ModelStateTests(SimpleTestCase):
size = models.IntegerField()
class Meta:
constraints = [models.CheckConstraint(models.Q(size__gt=1), 'size_gt_1')]
constraints = [models.CheckConstraint(check=models.Q(size__gt=1), name='size_gt_1')]
state = ModelState.from_model(ModelWithConstraints)
model_constraints = ModelWithConstraints._meta.constraints