Django raises some of its own exceptions as well as standard Python exceptions.
Django core exception classes are defined in django.core.exceptions.
AppRegistryNotReady¶AppRegistryNotReady[código fonte]¶This exception is raised when attempting to use models before the app loading process, which initializes the ORM, is complete.
ObjectDoesNotExist¶ObjectDoesNotExist[código fonte]¶The base class for DoesNotExist exceptions;
a try/except for ObjectDoesNotExist will catch
DoesNotExist exceptions for all models.
See get() for further information
on ObjectDoesNotExist and DoesNotExist.
EmptyResultSet¶EmptyResultSet[código fonte]¶EmptyResultSet may be raised during query generation if a query won’t
return any results. Most Django projects won’t encounter this exception,
but it might be useful for implementing custom lookups and expressions.
In older versions, it’s only importable from django.db.models.sql.
FieldDoesNotExist¶FieldDoesNotExist[código fonte]¶The FieldDoesNotExist exception is raised by a model’s
_meta.get_field() method when the requested field does not exist on the
model or on the model’s parents.
MultipleObjectsReturned¶MultipleObjectsReturned[código fonte]¶The MultipleObjectsReturned exception is raised by a query if only
one object is expected, but multiple objects are returned. A base version
of this exception is provided in django.core.exceptions; each model
class contains a subclassed version that can be used to identify the
specific object type that has returned multiple objects.
See get() for further information.
SuspiciousOperation¶SuspiciousOperation[código fonte]¶The SuspiciousOperation exception is raised when a user has
performed an operation that should be considered suspicious from a security
perspective, such as tampering with a session cookie. Subclasses of
SuspiciousOperation include:
DisallowedHostDisallowedModelAdminLookupDisallowedModelAdminToFieldDisallowedRedirectInvalidSessionKeyRequestDataTooBigSuspiciousFileOperationSuspiciousMultipartFormSuspiciousSessionTooManyFieldsSentIf a SuspiciousOperation exception reaches the WSGI handler level it is
logged at the Error level and results in
a HttpResponseBadRequest. See the logging
documentation for more information.
PermissionDenied¶PermissionDenied[código fonte]¶The PermissionDenied exception is raised when a user does not have
permission to perform the action requested.
ViewDoesNotExist¶ViewDoesNotExist[código fonte]¶The ViewDoesNotExist exception is raised by
django.urls when a requested view does not exist.
MiddlewareNotUsed¶MiddlewareNotUsed[código fonte]¶The MiddlewareNotUsed exception is raised when a middleware is not
used in the server configuration.
ImproperlyConfigured¶ImproperlyConfigured[código fonte]¶The ImproperlyConfigured exception is raised when Django is
somehow improperly configured – for example, if a value in settings.py
is incorrect or unparseable.
FieldError¶FieldError[código fonte]¶The FieldError exception is raised when there is a problem with a
model field. This can happen for several reasons:
ValidationError¶ValidationError[código fonte]¶The ValidationError exception is raised when data fails form or
model field validation. For more information about validation, see
Form and Field Validation,
Model Field Validation and the
Validator Reference.
URL Resolver exceptions are defined in django.urls.
Resolver404¶Resolver404[código fonte]¶The Resolver404 exception is raised by
resolve() if the path passed to resolve() doesn’t
map to a view. It’s a subclass of django.http.Http404.
NoReverseMatch¶NoReverseMatch[código fonte]¶The NoReverseMatch exception is raised by django.urls when a
matching URL in your URLconf cannot be identified based on the parameters
supplied.
Database exceptions may be imported from django.db.
Django wraps the standard database exceptions so that your Django code has a guaranteed common implementation of these classes.
Error[código fonte]¶InterfaceError[código fonte]¶DatabaseError[código fonte]¶DataError[código fonte]¶OperationalError[código fonte]¶IntegrityError[código fonte]¶InternalError[código fonte]¶ProgrammingError[código fonte]¶NotSupportedError[código fonte]¶The Django wrappers for database exceptions behave exactly the same as the underlying database exceptions. See PEP 249, the Python Database API Specification v2.0, for further information.
As per PEP 3134, a __cause__ attribute is set with the original
(underlying) database exception, allowing access to any additional
information provided.
models.ProtectedError¶Raised to prevent deletion of referenced objects when using
django.db.models.PROTECT. models.ProtectedError is a subclass
of IntegrityError.
Http exceptions may be imported from django.http.
UnreadablePostError¶UnreadablePostError[código fonte]¶UnreadablePostError is raised when a user cancels an upload.
Transaction exceptions are defined in django.db.transaction.
TransactionManagementError¶TransactionManagementError[código fonte]¶TransactionManagementError is raised for any and all problems
related to database transactions.
Exceptions provided by the django.test package.
RedirectCycleError¶client.RedirectCycleError¶RedirectCycleError is raised when the test client detects a
loop or an overly long chain of redirects.
Django raises built-in Python exceptions when appropriate as well. See the Python documentation for further information on the Built-in Exceptions.
ago 01, 2018