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Diffstat (limited to 'docs/narr/hooks.rst')
| -rw-r--r-- | docs/narr/hooks.rst | 87 |
1 files changed, 44 insertions, 43 deletions
diff --git a/docs/narr/hooks.rst b/docs/narr/hooks.rst index 7d4d03b89..3a2568775 100644 --- a/docs/narr/hooks.rst +++ b/docs/narr/hooks.rst @@ -14,27 +14,28 @@ in various ways. Changing the Not Found View --------------------------- -When :app:`Pyramid` can't map a URL to view code, it invokes a :term:`not -found view`, which is a :term:`view callable`. A default notfound view -exists. The default not found view can be overridden through application -configuration. +When :app:`Pyramid` can't map a URL to view code, it invokes a :term:`Not +Found View`, which is a :term:`view callable`. The default Not Found View +can be overridden through application configuration. If your application uses :term:`imperative configuration`, you can replace -the Not Found view by using the +the Not Found View by using the :meth:`pyramid.config.Configurator.add_notfound_view` method: .. code-block:: python :linenos: - from helloworld.views import notfound - config.add_notfound_view(notfound) + def notfound(request): + return Response('Not Found, dude', status='404 Not Found') -Replace ``helloworld.views.notfound`` with a reference to the :term:`view -callable` you want to use to represent the Not Found view. The :term:`not -found view` callable is a view callable like any other. + def main(globals, **settings): + config = Configurator() + config.add_notfound_view(notfound) + +The :term:`Not Found View` callable is a view callable like any other. If your application instead uses :class:`pyramid.view.view_config` decorators -and a :term:`scan`, you can replace the Not Found view by using the +and a :term:`scan`, you can replace the Not Found View by using the :class:`pyramid.view.notfound_view_config` decorator: .. code-block:: python @@ -47,17 +48,17 @@ and a :term:`scan`, you can replace the Not Found view by using the return Response('Not Found, dude', status='404 Not Found') def main(globals, **settings): - config = Configurator() - config.scan() + config = Configurator() + config.scan() This does exactly what the imperative example above showed. -Your application can define *multiple* not found views if necessary. Both +Your application can define *multiple* Not Found Views if necessary. Both :meth:`pyramid.config.Configurator.add_notfound_view` and :class:`pyramid.view.notfound_view_config` take most of the same arguments as :class:`pyramid.config.Configurator.add_view` and -:class:`pyramid.view.view_config`, respectively. This means that not found -views can carry predicates limiting their applicability. For example: +:class:`pyramid.view.view_config`, respectively. This means that Not Found +Views can carry predicates limiting their applicability. For example: .. code-block:: python :linenos: @@ -80,7 +81,7 @@ The ``notfound_get`` view will be called when a view could not be found and the request method was ``GET``. The ``notfound_post`` view will be called when a view could not be found and the request method was ``POST``. -Like any other view, the notfound view must accept at least a ``request`` +Like any other view, the Not Found View must accept at least a ``request`` parameter, or both ``context`` and ``request``. The ``request`` is the current :term:`request` representing the denied action. The ``context`` (if used in the call signature) will be the instance of the @@ -92,7 +93,8 @@ Both :meth:`pyramid.config.Configurator.add_notfound_view` and redirect requests to slash-appended routes. See :ref:`redirecting_to_slash_appended_routes` for examples. -Here's some sample code that implements a minimal NotFound view callable: +Here's some sample code that implements a minimal :term:`Not Found View` +callable: .. code-block:: python :linenos: @@ -104,14 +106,13 @@ Here's some sample code that implements a minimal NotFound view callable: .. note:: - When a NotFound view callable is invoked, it is passed a + When a Not Found View callable is invoked, it is passed a :term:`request`. The ``exception`` attribute of the request will be an instance of the :exc:`~pyramid.httpexceptions.HTTPNotFound` exception that - caused the not found view to be called. The value of - ``request.exception.message`` will be a value explaining why the not found - error was raised. This message will be different when the - ``pyramid.debug_notfound`` environment setting is true than it is when it - is false. + caused the Not Found View to be called. The value of + ``request.exception.message`` will be a value explaining why the Not Found + error was raised. This message has different values depending whether the + ``pyramid.debug_notfound`` environment setting is true or false. .. note:: @@ -123,7 +124,7 @@ Here's some sample code that implements a minimal NotFound view callable: .. warning:: - When a NotFound view callable accepts an argument list as + When a Not Found View callable accepts an argument list as described in :ref:`request_and_context_view_definitions`, the ``context`` passed as the first argument to the view callable will be the :exc:`~pyramid.httpexceptions.HTTPNotFound` exception instance. If @@ -155,12 +156,12 @@ forbidden view: .. code-block:: python :linenos: - from helloworld.views import forbidden_view - from pyramid.httpexceptions import HTTPForbidden - config.add_forbidden_view(forbidden_view) + def forbidden(request): + return Response('forbidden') -Replace ``helloworld.views.forbidden_view`` with a reference to the Python -:term:`view callable` you want to use to represent the Forbidden view. + def main(globals, **settings): + config = Configurator() + config.add_forbidden_view(forbidden_view) If instead you prefer to use decorators and a :term:`scan`, you can use the :class:`pyramid.view.forbidden_view_config` decorator to mark a view callable @@ -208,9 +209,9 @@ Here's some sample code that implements a minimal forbidden view: that caused the forbidden view to be called. The value of ``request.exception.message`` will be a value explaining why the forbidden was raised and ``request.exception.result`` will be extended information - about the forbidden exception. These messages will be different when the - ``pyramid.debug_authorization`` environment setting is true than it is when - it is false. + about the forbidden exception. These messages have different values + depending whether the ``pyramid.debug_authorization`` environment setting + is true or false. .. index:: single: request factory @@ -290,7 +291,7 @@ actually execute the function until accessed. return sum(args) def prop(request): - print "getting the property" + print("getting the property") return "the property" config = Configurator() @@ -331,7 +332,7 @@ Here is an example of passing a class to ``Configurator.add_request_method``: # use @property if you don't want to cache the result @reify def prop(self): - print "getting the property" + print("getting the property") return "the property" config = Configurator() @@ -674,7 +675,7 @@ traverser. If you've added a traverser, you can change how :meth:`~pyramid.request.Request.resource_url` generates a URL for a specific type of resource by adding a call to -:meth:`pyramid.config.add_resource_url_adapter`. +:meth:`pyramid.config.Configurator.add_resource_url_adapter`. For example: @@ -694,7 +695,7 @@ represents the type of interface that must be possessed by the resource for this resource url factory to be found. If the ``resource_iface`` argument is omitted, this resource url adapter will be used for *all* resources. -The API that must be implemented by your a class that provides +The API that must be implemented by a class that provides :class:`~pyramid.interfaces.IResourceURL` is as follows: .. code-block:: python @@ -712,7 +713,7 @@ The API that must be implemented by your a class that provides The default context URL generator is available for perusal as the class :class:`pyramid.traversal.ResourceURL` in the `traversal module -<http://github.com/Pylons/pyramid/blob/master/pyramid/traversal.py>`_ of the +<https://github.com/Pylons/pyramid/blob/master/pyramid/traversal.py>`_ of the :term:`Pylons` GitHub Pyramid repository. See :meth:`pyramid.config.add_resource_url_adapter` for more information. @@ -930,7 +931,7 @@ set a *default* view mapper (overriding the superdefault view mapper used by Pyramid itself). A *single* view registration can use a view mapper by passing the mapper as -the ``mapper`` argument to :meth:`~pyramid.config.Configuration.add_view`. +the ``mapper`` argument to :meth:`~pyramid.config.Configurator.add_view`. .. index:: single: configuration decorator @@ -1036,7 +1037,7 @@ upstream WSGI component that uses :app:`Pyramid` as its "app". This is a feature that may be used by Pyramid framework extensions, to provide, for example, Pyramid-specific view timing support bookkeeping code that examines exceptions before they are returned to the upstream WSGI application. Tweens -behave a bit like :term:`WSGI` middleware but they have the benefit of +behave a bit like :term:`WSGI` :term:`middleware` but they have the benefit of running in a context in which they have access to the Pyramid :term:`application registry` as well as the Pyramid rendering machinery. @@ -1110,8 +1111,8 @@ Once you've created a tween factory, you can register it into the implicit tween chain using the :meth:`pyramid.config.Configurator.add_tween` method using its :term:`dotted Python name`. -Here's an example of registering the a tween factory as an "implicit" -tween in a Pyramid application: +Here's an example of registering a tween factory as an "implicit" tween in a +Pyramid application: .. code-block:: python :linenos: @@ -1447,7 +1448,7 @@ view/route predicate: subscriber predicates will assume a certain event type. Here's an example of a subscriber predicate that can be used in conjunction -with a subscriber that subscribes to the :class:`pyramid.events.NewReqest` +with a subscriber that subscribes to the :class:`pyramid.events.NewRequest` event type. .. code-block:: python |