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import and unwrap string
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mmerickel-feature.pshell
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represents a set of keyword arguments to pass to the Venusian ``Scanner``
object created by Pyramid. (See the Venusian documentation for more
information about ``Scanner``).
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Generic WSGI apps can now be loaded without exposing the 'registry' and
'root' objects.
When an app is loaded, extra variables will be exposed to the
environment from a special [pshell] section of the INI file. These
variables are of the format "name = asset.path.to.object".
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``application/json``, this attribute will contain the JSON-decoded
variant of the request body. If the request's ``content_type`` is not
``application/json``, this attribute will be ``None``.
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parameter.
When you supply an ``http_cache`` value to a view configuration, the
``Expires`` and ``Cache-Control`` headers of a response generated by the
associated view callable are modified. The value for ``http_cache`` may be
one of the following:
- A nonzero integer. If it's a nonzero integer, it's treated as a number
of seconds. This number of seconds will be used to compute the
``Expires`` header and the ``Cache-Control: max-age`` parameter of
responses to requests which call this view. For example:
``http_cache=3600`` instructs the requesting browser to 'cache this
response for an hour, please'.
- A ``datetime.timedelta`` instance. If it's a ``datetime.timedelta``
instance, it will be converted into a number of seconds, and that number
of seconds will be used to compute the ``Expires`` header and the
``Cache-Control: max-age`` parameter of responses to requests which call
this view. For example: ``http_cache=datetime.timedelta(days=1)``
instructs the requesting browser to 'cache this response for a day,
please'.
- Zero (``0``). If the value is zero, the ``Cache-Control`` and
``Expires`` headers present in all responses from this view will be
composed such that client browser cache (and any intermediate caches) are
instructed to never cache the response.
- A two-tuple. If it's a two tuple (e.g. ``http_cache=(1,
{'public':True})``), the first value in the tuple may be a nonzero
integer or a ``datetime.timedelta`` instance; in either case this value
will be used as the number of seconds to cache the response. The second
value in the tuple must be a dictionary. The values present in the
dictionary will be used as input to the ``Cache-Control`` response
header. For example: ``http_cache=(3600, {'public':True})`` means 'cache
for an hour, and add ``public`` to the Cache-Control header of the
response'. All keys and values supported by the
``webob.cachecontrol.CacheControl`` interface may be added to the
dictionary. Supplying ``{'public':True}`` is equivalent to calling
``response.cache_control.public = True``.
Providing a non-tuple value as ``http_cache`` is equivalent to calling
``response.cache_expires(value)`` within your view's body.
Providing a two-tuple value as ``http_cache`` is equivalent to calling
``response.cache_expires(value[0], **value[1])`` within your view's body.
If you wish to avoid influencing, the ``Expires`` header, and instead wish
to only influence ``Cache-Control`` headers, pass a tuple as ``http_cache``
with the first element of ``None``, e.g.: ``(None, {'public':True})``.
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documentation when passed more than one interface object to its
constructor. For example, when the following listener was registered::
@subscriber(IFoo, IBar)
def expects_ifoo_events_and_ibar_events(event):
print event
The Events chapter docs claimed that the listener would be registered and
listening for both ``IFoo`` and ``IBar`` events. Instead, it registered an
"object event" subscriber which would only be called if an IObjectEvent was
emitted where the object interface was ``IFoo`` and the event interface was
``IBar``.
The behavior now matches the documentation. If you were relying on the
buggy behavior of the 1.0 ``subscriber`` directive in order to register an
object event subscriber, you must now pass a sequence to indicate you'd
like to register a subscriber for an object event. e.g.:
@subscriber([IFoo, IBar])
def expects_object_event(object, event):
print object, event
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and the ``renderer_globals`` Configurator constructor parameter.
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"either" implies there is an alternative to one of the listed strings (perhaps that you can pass some other kind of value such as a sequence of allowed request methods - which is not the case).
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attributes deprecated for ``pyramid.request.Request`` are accessed (like
``response_content_type``). This is for the benefit of folks running unit
tests which use DummyRequest instead of a "real" request, so they know
things are deprecated without necessarily needing a functional test suite.
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preprocessor to be specified as a Python callable or Python dotted name.
See https://github.com/Pylons/pyramid/pull/183 for rationale.
Closes #183.
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(e.g. ``response_content_type``) now issues a deprecation warning at access
time rather than at rendering time.
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``config.add_translation_dirs``, the directories were inserted into the
beginning of the directory list in the wrong order: they were inserted in
the reverse of the order they were provided in the ``*specs`` list (items
later in the list trumped ones earlier in the list). This is now fixed.
Note however, that later calls to ``config.add_translation_dirs`` continue
to insert directories into the beginning of the list of translation
directories created by earlier calls. This means that the same translation
found in a directory added via ``add_translation_dirs`` later in the
configuration process will be found before one added earlier via a separate
call to ``add_translation_dirs`` in the configuration process.
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``environ['repoze.bfg.message']`` when it caught a view-related exception
for backwards compatibility with :mod:`repoze.bfg` during error handling.
It did this by using code that looked like so::
# "why" is an exception object
try:
msg = why[0]
except:
msg = ''
environ['repoze.bfg.message'] = msg
Use of the value ``environ['repoze.bfg.message']`` was docs-deprecated in
Pyramid 1.0. Our standing policy is to not remove features after a
deprecation for two full major releases, so this code was originally slated
to be removed in Pyramid 1.2. However, computing the
``repoze.bfg.message`` value was the source of at least one bug found in
the wild (https://github.com/Pylons/pyramid/issues/199), and there isn't a
foolproof way to both preserve backwards compatibility and to fix the bug.
Therefore, the code which sets the value has been removed in this release.
Code in exception views which relies on this value's presence in the
environment should now use the ``exception`` attribute of the request
(e.g. ``request.exception[0]``) to retrieve the message instead of relying
on ``request.environ['repoze.bfg.message']``.
Closes #199.
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webob.exc.WSGIHTTPException (convenience).
- Use ``exc.message`` in docs rather than ``exc.args[0]`` now that
we control this.
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ensure they all work.
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- The ``pyramid.httpexceptions`` classes named ``HTTPFound``,
``HTTPMultipleChoices``, ``HTTPMovedPermanently``, ``HTTPSeeOther``,
``HTTPUseProxy``, and ``HTTPTemporaryRedirect`` now accept ``location`` as
their first positional argument rather than ``detail``. This means that
you can do, e.g. ``return pyramid.httpexceptions.HTTPFound('http://foo')``
rather than ``return
pyramid.httpexceptions.HTTPFound(location='http//foo')`` (the latter will
of course continue to work).
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