def __init__(self, real_apps, models, ignore_swappable=False):
# Any apps in self.real_apps should have all their models included
# in the render. We don't use the original model instances as there
# are some variables that refer to the Apps object.
# FKs/M2Ms from real apps are also not included as they just
# mess things up with partial states (due to lack of dependencies)
self.real_models = []
for app_label in real_apps:
app = global_apps.get_app_config(app_label)
for model in app.get_models():
self.real_models.append(
ModelState.from_model(model, exclude_rels=True))
# Populate the app registry with a stub for each application.
app_labels = {model_state.app_label for model_state in models.values()}
app_configs = [
AppConfigStub(label)
for label in sorted(real_apps + list(app_labels))
]
super().__init__(app_configs)
# The lock gets in the way of copying as implemented in clone(), which
# is called whenever Django duplicates a StateApps before updating it.
self._lock = None
self.render_multiple(list(models.values()) + self.real_models)
# There shouldn't be any operations pending at this point.
from django.core.checks.model_checks import _check_lazy_references
ignore = {make_model_tuple(settings.AUTH_USER_MODEL)
} if ignore_swappable else set()
errors = _check_lazy_references(self, ignore=ignore)
if errors:
raise ValueError("\n".join(error.msg for error in errors))
def __init__(self, real_apps, models, ignore_swappable=False):
# Any apps in self.real_apps should have all their models included
# in the render. We don't use the original model instances as there
# are some variables that refer to the Apps object.
# FKs/M2Ms from real apps are also not included as they just
# mess things up with partial states (due to lack of dependencies)
self.real_models = []
for app_label in real_apps:
app = global_apps.get_app_config(app_label)
for model in app.get_models():
self.real_models.append(ModelState.from_model(model, exclude_rels=True))
# Populate the app registry with a stub for each application.
app_labels = {model_state.app_label for model_state in models.values()}
app_configs = [AppConfigStub(label) for label in sorted(real_apps + list(app_labels))]
super(StateApps, self).__init__(app_configs)
# The lock gets in the way of copying as implemented in clone(), which
# is called whenever Django duplicates a StateApps before updating it.
self._lock = None
self.render_multiple(list(models.values()) + self.real_models)
# There shouldn't be any operations pending at this point.
from django.core.checks.model_checks import _check_lazy_references
ignore = {make_model_tuple(settings.AUTH_USER_MODEL)} if ignore_swappable else set()
errors = _check_lazy_references(self, ignore=ignore)
if errors:
raise ValueError("\n".join(error.msg for error in errors))
def test_lazy_reference_checks(self, apps):
class DummyModel(models.Model):
author = models.ForeignKey('Author', models.CASCADE)
class Meta:
app_label = 'invalid_models_tests'
class DummyClass:
def __call__(self, **kwargs):
pass
def dummy_method(self):
pass
def dummy_function(*args, **kwargs):
pass
apps.lazy_model_operation(dummy_function, ('auth', 'imaginarymodel'))
apps.lazy_model_operation(dummy_function,
('fanciful_app', 'imaginarymodel'))
post_init.connect(dummy_function,
sender='missing-app.Model',
apps=apps)
post_init.connect(DummyClass(), sender='missing-app.Model', apps=apps)
post_init.connect(DummyClass().dummy_method,
sender='missing-app.Model',
apps=apps)
self.assertEqual(_check_lazy_references(apps), [
Error(
"%r contains a lazy reference to auth.imaginarymodel, "
"but app 'auth' doesn't provide model 'imaginarymodel'." %
dummy_function,
obj=dummy_function,
id='models.E022',
),
Error(
"%r contains a lazy reference to fanciful_app.imaginarymodel, "
"but app 'fanciful_app' isn't installed." % dummy_function,
obj=dummy_function,
id='models.E022',
),
Error(
"An instance of class 'DummyClass' was connected to "
"the 'post_init' signal with a lazy reference to the sender "
"'missing-app.model', but app 'missing-app' isn't installed.",
hint=None,
obj='invalid_models_tests.test_models',
id='signals.E001',
),
Error(
"Bound method 'DummyClass.dummy_method' was connected to the "
"'post_init' signal with a lazy reference to the sender "
"'missing-app.model', but app 'missing-app' isn't installed.",
hint=None,
obj='invalid_models_tests.test_models',
id='signals.E001',
),
Error(
"The field invalid_models_tests.DummyModel.author was declared "
"with a lazy reference to 'invalid_models_tests.author', but app "
"'invalid_models_tests' isn't installed.",
hint=None,
obj=DummyModel.author.field,
id='fields.E307',
),
Error(
"The function 'dummy_function' was connected to the 'post_init' "
"signal with a lazy reference to the sender "
"'missing-app.model', but app 'missing-app' isn't installed.",
hint=None,
obj='invalid_models_tests.test_models',
id='signals.E001',
),
])
def test_lazy_reference_checks(self, apps):
class DummyModel(models.Model):
author = models.ForeignKey('Author', models.CASCADE)
class Meta:
app_label = 'invalid_models_tests'
class DummyClass(object):
def __call__(self, **kwargs):
pass
def dummy_method(self):
pass
def dummy_function(*args, **kwargs):
pass
apps.lazy_model_operation(dummy_function, ('auth', 'imaginarymodel'))
apps.lazy_model_operation(dummy_function, ('fanciful_app', 'imaginarymodel'))
post_init.connect(dummy_function, sender='missing-app.Model', apps=apps)
post_init.connect(DummyClass(), sender='missing-app.Model', apps=apps)
post_init.connect(DummyClass().dummy_method, sender='missing-app.Model', apps=apps)
expected = [
Error(
"%r contains a lazy reference to auth.imaginarymodel, "
"but app 'auth' doesn't provide model 'imaginarymodel'." % dummy_function,
obj=dummy_function,
id='models.E022',
),
Error(
"%r contains a lazy reference to fanciful_app.imaginarymodel, "
"but app 'fanciful_app' isn't installed." % dummy_function,
obj=dummy_function,
id='models.E022',
),
Error(
"An instance of class 'DummyClass' was connected to "
"the 'post_init' signal with a lazy reference to the sender "
"'missing-app.model', but app 'missing-app' isn't installed.",
hint=None,
obj='invalid_models_tests.test_models',
id='signals.E001',
),
Error(
"Bound method 'DummyClass.dummy_method' was connected to the "
"'post_init' signal with a lazy reference to the sender "
"'missing-app.model', but app 'missing-app' isn't installed.",
hint=None,
obj='invalid_models_tests.test_models',
id='signals.E001',
),
Error(
"The field invalid_models_tests.DummyModel.author was declared "
"with a lazy reference to 'invalid_models_tests.author', but app "
"'invalid_models_tests' isn't installed.",
hint=None,
obj=DummyModel.author.field,
id='fields.E307',
),
Error(
"The function 'dummy_function' was connected to the 'post_init' "
"signal with a lazy reference to the sender "
"'missing-app.model', but app 'missing-app' isn't installed.",
hint=None,
obj='invalid_models_tests.test_models',
id='signals.E001',
),
]
self.assertEqual(_check_lazy_references(apps), expected)
