CHANGES.txt

Next Release
============

Features
--------

- Users can now provide dotted Python names to as the ``factory`` argument
  the Configurator methods named ``add_{view,route,subscriber}_predicate`` 
  (instead of passing the predicate factory directly, you can pass a 
  dotted name which refers to the factory).

Bug Fixes
---------

- Fix an exception in ``pyramid.path.package_name`` when resolving the package
  name for namespace packages that had no ``__file__`` attribute.

Backwards Incompatibilities
---------------------------

- Pyramid has dropped native support for the Mako and Chameleon templating 
  system renderers. To re-add support for these renderers into your existing 
  projects, there are 3 steps:

  - Add ``pyramid_mako`` and/or ``pyramid_chameleon`` as dependencies by
    adding them to the `install_requires` section of your package's `setup.py`::

        setup(
            #...
            install_requires=[
                'pyramid_mako',         # new dependency
                'pyramid_chameleon',    # new dependency
                'pyramid',
                #...
            ],
        )

  - Update instances of the ``pyramid.config.Configurator`` to ``include`` the
    one or the other (or both) required addons::

        config.include('pyramid_chameleon')
        config.include('pyramid_mako')

  - If any unit tests are invoking either ``pyramid.renderers.render()`` or
    ``pyramid.renderers.render_to_response()`` with either Mako or Chameleon
    templates then the ``pyramid.config.Configurator`` instance at the root of
    the unit test should be also be updated to include the addons, as shown
    above. For example::

        config = pyramid.testing.setUp()
        config.include('pyramid_mako')

        result = pyramid.renderers.render('mypkg:templates/home.mako', {})

  Note that if you're using the Pyramid debug toolbar, when you upgrade 
  Pyramid, you'll also need to upgrade the ``pyramid_debugtoolbar`` package to
  at least version 1.0.8, as older versions are not compatible with Pyramid
  1.5a2+ due to this change.

- Removed the ``request.response_*`` varying attributes. These attributes
  have been deprecated since Pyramid 1.1, and as per the deprecation policy,
  have now been removed.

- ``request.response`` will no longer be mutated when using the 
  ``pyramid.renderers.render()`` API.  Almost all renderers mutate the 
  ``request.response`` response object (for example, the JSON renderer sets
  ``request.response.content_type`` to ``application/json``), but this is
  only necessary when the renderer is generating a response; it was a bug
  when it was done as a side effect of calling ``pyramid.renderers.render()``.

- Removed the ``bfg2pyramid`` fixer script.

- The ``pyramid.events.NewResponse`` event is now sent **after** response 
  callbacks are executed.  It previously executed before response callbacks
  were executed.  Rationale: it's more useful to be able to inspect the response
  after response callbacks have done their jobs instead of before.

- Removed the class named ``pyramid.view.static`` that had been deprecated
  since Pyramid 1.1.  Instead use ``pyramid.static.static_view`` with
  ``use_subpath=True`` argument.

- Removed the ``pyramid.view.is_response`` function that had been deprecated
  since Pyramid 1.1.  Use the ``pyramid.request.Request.is_response`` method
  instead.

- Removed the ability to pass the following arguments to
  ``pyramid.config.Configurator.add_route``: ``view``, ``view_context``.
  ``view_for``, ``view_permission``, ``view_renderer``, and ``view_attr``.
  Using these arguments had been deprecated since Pyramid 1.1.  Instead of
  passing view-related arguments to ``add_route``, use a separate call to
  ``pyramid.config.Configurator.add_view`` to associate a view with a route
  using its ``route_name`` argument.  Note that this impacts the
  ``pyramid.config.Configurator.add_static_view`` function too, because it
  delegates to ``add_route``.

- Removed the ability to influence and query a ``pyramid.request.Request``
  object as if it were a dictionary.  Previously it was possible to use methods
  like ``__getitem__``, ``get``, ``items``, and other dictlike methods to
  access values in the WSGI environment.  This behavior had been deprecated
  since Pyramid 1.1.  Use methods of ``request.environ`` (a real dictionary)
  instead.

- Removed ancient backwards compatibily hack in
  ``pyramid.traversal.DefaultRootFactory`` which populated the ``__dict__`` of
  the factory with the matchdict values for compatibility with BFG 0.9.

- The ``renderer_globals_factory`` argument to the
  ``pyramid.config.Configurator` constructor and its ``setup_registry`` method
  has been removed.  The ``set_renderer_globals_factory`` method of
  ``pyramid.config.Configurator`` has also been removed.  The (internal)
  ``pyramid.interfaces.IRendererGlobals`` interface was also removed.  These
  arguments, methods and interfaces had been deprecated since 1.1.  Use a
  ``BeforeRender`` event subscriber as documented in the "Hooks" chapter of the
  Pyramid narrative documentation instead of providing renderer globals values
  to the configurator.

Deprecations
------------

- The ``pyramid.config.Configurator.set_request_property`` method now issues
  a deprecation warning when used.  It had been docs-deprecated in 1.4
  but did not issue a deprecation warning when used.

1.5a1 (2013-08-30)
==================

Features
--------

- A new http exception subclass named ``pyramid.httpexceptions.HTTPSuccessful``
  was added.  You can use this class as the ``context`` of an exception
  view to catch all 200-series "exceptions" (e.g. "raise HTTPOk").  This 
  also allows you to catch *only* the ``HTTPOk`` exception itself; previously
  this was impossible because a number of other exceptions 
  (such as ``HTTPNoContent``) inherited from ``HTTPOk``, but now they do not.

- You can now generate "hybrid" urldispatch/traversal URLs more easily
  by using the new ``route_name``, ``route_kw`` and ``route_remainder_name`` 
  arguments to  ``request.resource_url`` and ``request.resource_path``.  See
  the new section of the "Combining Traversal and URL Dispatch" documentation 
  chapter entitled  "Hybrid URL Generation".

- It is now possible to escape double braces in Pyramid scaffolds (unescaped, 
  these represent replacement values).  You can use ``\{\{a\}\}`` to
  represent a "bare" ``{{a}}``.  See 
  https://github.com/Pylons/pyramid/pull/862

- Add ``localizer`` and ``locale_name`` properties (reified) to the request.
  See https://github.com/Pylons/pyramid/issues/508.  Note that the 
  ``pyramid.i18n.get_localizer`` and ``pyramid.i18n.get_locale_name`` functions
  now simply look up these properties on the request.

- Add ``pdistreport`` script, which prints the Python version in use, the
  Pyramid version in use, and the version number and location of all Python
  distributions currently installed.

- Add the ability to invert the result of any view, route, or subscriber
  predicate using the ``not_`` class.  For example::

     from pyramid.config import not_

     @view_config(route_name='myroute', request_method=not_('POST'))
     def myview(request): ...

  The above example will ensure that the view is called if the request method
  is not POST (at least if no other view is more specific).

  The :class:`pyramid.config.not_` class can be used against any value that is
  a predicate value passed in any of these contexts:

  - ``pyramid.config.Configurator.add_view``

  - ``pyramid.config.Configurator.add_route``

  - ``pyramid.config.Configurator.add_subscriber``

  - ``pyramid.view.view_config``

  - ``pyramid.events.subscriber``

- ``scripts/prequest.py``: add support for submitting ``PUT`` and ``PATCH``
  requests.  See https://github.com/Pylons/pyramid/pull/1033.  add support for
  submitting ``OPTIONS`` and ``PROPFIND`` requests, and  allow users to specify
  basic authentication credentials in the request via a ``--login`` argument to
  the script.  See https://github.com/Pylons/pyramid/pull/1039.

- ``ACLAuthorizationPolicy`` supports ``__acl__`` as a callable. This
  removes the ambiguity between the potential ``AttributeError`` that would
  be raised on the ``context`` when the property was not defined and the
  ``AttributeError`` that could be raised from any user-defined code within
  a dynamic property. It is recommended to define a dynamic ACL as a callable
  to avoid this ambiguity. See https://github.com/Pylons/pyramid/issues/735.

- Allow a protocol-relative URL (e.g. ``//example.com/images``) to be passed to
  ``pyramid.config.Configurator.add_static_view``. This allows
  externally-hosted static URLs to be generated based on the current protocol.

- The ``AuthTktAuthenticationPolicy`` has two new options to configure its
  domain usage: 

  * ``parent_domain``: if set the authentication cookie is set on
    the parent domain. This is useful if you have multiple sites sharing the
    same domain.
  * ``domain``: if provided the cookie is always set for this domain, bypassing
    all usual logic.

  See https://github.com/Pylons/pyramid/pull/1028,
  https://github.com/Pylons/pyramid/pull/1072 and
  https://github.com/Pylons/pyramid/pull/1078.

- The ``AuthTktAuthenticationPolicy`` now supports IPv6 addresses when using
  the ``include_ip=True`` option. This is possibly incompatible with
  alternative ``auth_tkt`` implementations, as the specification does not
  define how to properly handle IPv6. See
  https://github.com/Pylons/pyramid/issues/831.

- Make it possible to use variable arguments via
  ``pyramid.paster.get_appsettings``. This also allowed the generated
  ``initialize_db`` script from the ``alchemy`` scaffold to grow support
  for options in the form ``a=1 b=2`` so you can fill in
  values in a parameterized ``.ini`` file, e.g.
  ``initialize_myapp_db etc/development.ini a=1 b=2``.
  See https://github.com/Pylons/pyramid/pull/911

- The ``request.session.check_csrf_token()`` method and the ``check_csrf`` view
  predicate now take into account the value of the HTTP header named
  ``X-CSRF-Token`` (as well as the ``csrf_token`` form parameter, which they
  always did).  The header is tried when the form parameter does not exist.

- View lookup will now search for valid views based on the inheritance
  hierarchy of the context. It tries to find views based on the most
  specific context first, and upon predicate failure, will move up the
  inheritance chain to test views found by the super-type of the context.
  In the past, only the most specific type containing views would be checked
  and if no matching view could be found then a PredicateMismatch would be
  raised. Now predicate mismatches don't hide valid views registered on
  super-types. Here's an example that now works:

  .. code-block:: python

     class IResource(Interface):

         ...

     @view_config(context=IResource)
     def get(context, request):

         ...

     @view_config(context=IResource, request_method='POST')
     def post(context, request):

         ...

     @view_config(context=IResource, request_method='DELETE')
     def delete(context, request):

         ...

     @implementer(IResource)
     class MyResource:

         ...

     @view_config(context=MyResource, request_method='POST')
     def override_post(context, request):

         ...

  Previously the override_post view registration would hide the get
  and delete views in the context of MyResource -- leading to a
  predicate mismatch error when trying to use GET or DELETE
  methods. Now the views are found and no predicate mismatch is
  raised.
  See https://github.com/Pylons/pyramid/pull/786 and
  https://github.com/Pylons/pyramid/pull/1004 and
  https://github.com/Pylons/pyramid/pull/1046

- The ``pserve`` command now takes a ``-v`` (or ``--verbose``) flag and a
  ``-q`` (or ``--quiet``) flag.  Output from running ``pserve`` can be
  controlled using these flags.  ``-v`` can be specified multiple times to
  increase verbosity.  ``-q`` sets verbosity to ``0`` unconditionally.  The
  default verbosity level is ``1``.

- The ``alchemy`` scaffold tests now provide better coverage.  See
  https://github.com/Pylons/pyramid/pull/1029

- The ``pyramid.config.Configurator.add_route`` method now supports being
  called with an external URL as pattern. See
  https://github.com/Pylons/pyramid/issues/611 and the documentation section 
  in the "URL Dispatch" chapter entitled "External Routes" for more information.

Bug Fixes
---------

- It was not possible to use ``pyramid.httpexceptions.HTTPException`` as
  the ``context`` of an exception view as very general catchall for
  http-related exceptions when you wanted that exception view to override the 
  default exception view.  See https://github.com/Pylons/pyramid/issues/985

- When the ``pyramid.reload_templates`` setting was true, and a Chameleon 
  template was reloaded, and the renderer specification named a macro 
  (e.g. ``foo#macroname.pt``), renderings of the template after the template
  was reloaded due to a file change would produce the entire template body 
  instead of just a rendering of the macro.  See 
  https://github.com/Pylons/pyramid/issues/1013.

- Fix an obscure problem when combining a virtual root with a route with a 
  ``*traverse`` in its pattern.  Now the traversal path generated in
  such a configuration will be correct, instead of an element missing
  a leading slash.

- Fixed a Mako renderer bug returning a tuple with a previous defname value
  in some circumstances. See https://github.com/Pylons/pyramid/issues/1037
  for more information.

- Make the ``pyramid.config.assets.PackageOverrides`` object implement the API
  for ``__loader__`` objects specified in PEP 302.  Proxies to the
  ``__loader__`` set by the importer, if present; otherwise, raises
  ``NotImplementedError``.  This makes Pyramid static view overrides work
  properly under Python 3.3 (previously they would not).  See
  https://github.com/Pylons/pyramid/pull/1015 for more information.

- ``mako_templating``: added defensive workaround for non-importability of
  ``mako`` due to upstream ``markupsafe`` dropping Python 3.2 support.  Mako
  templating will no longer work under the combination of MarkupSafe 0.17 and
  Python 3.2 (although the combination of MarkupSafe 0.17 and Python 3.3 or any
  supported Python 2 version will work OK).

- Spaces and dots may now be in mako renderer template paths. This was
  broken when support for the new makodef syntax was added in 1.4a1.
  See https://github.com/Pylons/pyramid/issues/950

- ``pyramid.debug_authorization=true`` will now correctly print out
  ``Allowed`` for views registered with ``NO_PERMISSION_REQUIRED`` instead
  of invoking the ``permits`` method of the authorization policy.
  See https://github.com/Pylons/pyramid/issues/954

- Pyramid failed to install on some systems due to being packaged with
  some test files containing higher order characters in their names. These
  files have now been removed. See
  https://github.com/Pylons/pyramid/issues/981

- ``pyramid.testing.DummyResource`` didn't define ``__bool__``, so code under
  Python 3 would use ``__len__`` to find truthiness; this usually caused an
  instance of DummyResource to be "falsy" instead of "truthy".  See
  https://github.com/Pylons/pyramid/pull/1032

- The ``alchemy`` scaffold would break when the database was MySQL during
  tables creation.  See https://github.com/Pylons/pyramid/pull/1049

- The ``current_route_url`` method now attaches the query string to the URL by
  default. See
  https://github.com/Pylons/pyramid/issues/1040

- Make ``pserve.cherrypy_server_runner`` Python 3 compatible. See
  https://github.com/Pylons/pyramid/issues/718

Backwards Incompatibilities
---------------------------

- Modified the ``current_route_url`` method in pyramid.Request. The method
  previously returned the URL without the query string by default, it now does
  attach the query string unless it is overriden.

- The ``route_url`` and ``route_path`` APIs no longer quote ``/`` 
  to ``%2F`` when a replacement value contains a ``/``.  This was pointless,
  as WSGI servers always unquote the slash anyway, and Pyramid never sees the 
  quoted value.

- It is no longer possible to set a ``locale_name`` attribute of the request, 
  nor is it possible to set a ``localizer`` attribute of the request.  These
  are now "reified" properties that look up a locale name and localizer
  respectively using the machinery described in the "Internationalization"
  chapter of the documentation.

- If you send an ``X-Vhm-Root`` header with a value that ends with a slash (or
  any number of slashes), the trailing slash(es) will be removed before a URL
  is generated when you use use ``request.resource_url`` or
  ``request.resource_path``.  Previously the virtual root path would not have
  trailing slashes stripped, which would influence URL generation.

- The ``pyramid.interfaces.IResourceURL`` interface has now grown two new
  attributes: ``virtual_path_tuple`` and ``physical_path_tuple``.  These should
  be the tuple form of the resource's path (physical and virtual).