import inspect
import logging
import os
import threading
import venusian
from webob.exc import WSGIHTTPException as WebobWSGIHTTPException
from pyramid.interfaces import (
IDebugLogger,
IExceptionResponse,
PHASE0_CONFIG,
PHASE1_CONFIG,
PHASE2_CONFIG,
PHASE3_CONFIG,
)
from pyramid.asset import resolve_asset_spec
from pyramid.authorization import ACLAuthorizationPolicy
from pyramid._compat import text_, string_types
from pyramid.events import ApplicationCreated
from pyramid.exceptions import ConfigurationError
from pyramid.httpexceptions import default_exceptionresponse_view
from pyramid.path import caller_package, package_of
from pyramid.registry import Introspectable, Introspector, Registry
from pyramid.router import Router
from pyramid.settings import aslist
from pyramid.threadlocal import manager
from pyramid.util import WeakOrderedSet, object_description
from pyramid.config.actions import action_method, ActionState
from pyramid.config.predicates import not_
from pyramid.config.actions import ActionConfiguratorMixin
from pyramid.config.adapters import AdaptersConfiguratorMixin
from pyramid.config.assets import AssetsConfiguratorMixin
from pyramid.config.factories import FactoriesConfiguratorMixin
from pyramid.config.i18n import I18NConfiguratorMixin
from pyramid.config.predicates import PredicateConfiguratorMixin
from pyramid.config.rendering import RenderingConfiguratorMixin
from pyramid.config.routes import RoutesConfiguratorMixin
from pyramid.config.security import SecurityConfiguratorMixin
from pyramid.config.settings import SettingsConfiguratorMixin
from pyramid.config.testing import TestingConfiguratorMixin
from pyramid.config.tweens import TweensConfiguratorMixin
from pyramid.config.views import ViewsConfiguratorMixin
from pyramid.config.zca import ZCAConfiguratorMixin
from pyramid.path import DottedNameResolver
empty = text_('')
_marker = object()
not_ = not_ # api
PHASE0_CONFIG = PHASE0_CONFIG # api
PHASE1_CONFIG = PHASE1_CONFIG # api
PHASE2_CONFIG = PHASE2_CONFIG # api
PHASE3_CONFIG = PHASE3_CONFIG # api
ActionState = ActionState # bw-compat for pyramid_zcml
[docs]
class Configurator(
ActionConfiguratorMixin,
PredicateConfiguratorMixin,
TestingConfiguratorMixin,
TweensConfiguratorMixin,
SecurityConfiguratorMixin,
ViewsConfiguratorMixin,
RoutesConfiguratorMixin,
ZCAConfiguratorMixin,
I18NConfiguratorMixin,
RenderingConfiguratorMixin,
AssetsConfiguratorMixin,
SettingsConfiguratorMixin,
FactoriesConfiguratorMixin,
AdaptersConfiguratorMixin,
):
"""
A Configurator is used to configure a :app:`Pyramid`
:term:`application registry`.
The Configurator lifecycle can be managed by using a context manager to
automatically handle calling :meth:`pyramid.config.Configurator.begin` and
:meth:`pyramid.config.Configurator.end` as well as
:meth:`pyramid.config.Configurator.commit`.
.. code-block:: python
with Configurator(settings=settings) as config:
config.add_route('home', '/')
app = config.make_wsgi_app()
If the ``registry`` argument is not ``None``, it must
be an instance of the :class:`pyramid.registry.Registry` class
representing the registry to configure. If ``registry`` is ``None``, the
configurator will create a :class:`pyramid.registry.Registry` instance
itself; it will also perform some default configuration that would not
otherwise be done. After its construction, the configurator may be used
to add further configuration to the registry.
.. warning:: If ``registry`` is assigned the above-mentioned class
instance, all other constructor arguments are ignored,
with the exception of ``package``.
If the ``package`` argument is passed, it must be a reference to a Python
:term:`package` (e.g. ``sys.modules['thepackage']``) or a :term:`dotted
Python name` to the same. This value is used as a basis to convert
relative paths passed to various configuration methods, such as methods
which accept a ``renderer`` argument, into absolute paths. If ``None``
is passed (the default), the package is assumed to be the Python package
in which the *caller* of the ``Configurator`` constructor lives.
If the ``root_package`` is passed, it will propagate through the
configuration hierarchy as a way for included packages to locate
resources relative to the package in which the main ``Configurator`` was
created. If ``None`` is passed (the default), the ``root_package`` will
be derived from the ``package`` argument. The ``package`` attribute is
always pointing at the package being included when using :meth:`.include`,
whereas the ``root_package`` does not change.
If the ``settings`` argument is passed, it should be a Python dictionary
representing the :term:`deployment settings` for this application. These
are later retrievable using the
:attr:`pyramid.registry.Registry.settings` attribute (aka
``request.registry.settings``).
If the ``root_factory`` argument is passed, it should be an object
representing the default :term:`root factory` for your application or a
:term:`dotted Python name` to the same. If it is ``None``, a default
root factory will be used.
If ``authentication_policy`` is passed, it should be an instance
of an :term:`authentication policy` or a :term:`dotted Python
name` to the same.
If ``authorization_policy`` is passed, it should be an instance of
an :term:`authorization policy` or a :term:`dotted Python name` to
the same.
.. note:: A ``ConfigurationError`` will be raised when an
authorization policy is supplied without also supplying an
authentication policy (authorization requires authentication).
If ``renderers`` is ``None`` (the default), a default set of
:term:`renderer` factories is used. Else, it should be a list of
tuples representing a set of renderer factories which should be
configured into this application, and each tuple representing a set of
positional values that should be passed to
:meth:`pyramid.config.Configurator.add_renderer`.
If ``debug_logger`` is not passed, a default debug logger that logs to a
logger will be used (the logger name will be the package name of the
*caller* of this configurator). If it is passed, it should be an
instance of the :class:`logging.Logger` (PEP 282) standard library class
or a Python logger name. The debug logger is used by :app:`Pyramid`
itself to log warnings and authorization debugging information.
If ``locale_negotiator`` is passed, it should be a :term:`locale
negotiator` implementation or a :term:`dotted Python name` to
same. See :ref:`custom_locale_negotiator`.
If ``request_factory`` is passed, it should be a :term:`request
factory` implementation or a :term:`dotted Python name` to the same.
See :ref:`changing_the_request_factory`. By default it is ``None``,
which means use the default request factory.
If ``response_factory`` is passed, it should be a :term:`response
factory` implementation or a :term:`dotted Python name` to the same.
See :ref:`changing_the_response_factory`. By default it is ``None``,
which means use the default response factory.
If ``default_permission`` is passed, it should be a
:term:`permission` string to be used as the default permission for
all view configuration registrations performed against this
Configurator. An example of a permission string:``'view'``.
Adding a default permission makes it unnecessary to protect each
view configuration with an explicit permission, unless your
application policy requires some exception for a particular view.
By default, ``default_permission`` is ``None``, meaning that view
configurations which do not explicitly declare a permission will
always be executable by entirely anonymous users (any
authorization policy in effect is ignored).
.. seealso::
See also :ref:`setting_a_default_permission`.
If ``session_factory`` is passed, it should be an object which
implements the :term:`session factory` interface. If a nondefault
value is passed, the ``session_factory`` will be used to create a
session object when ``request.session`` is accessed. Note that
the same outcome can be achieved by calling
:meth:`pyramid.config.Configurator.set_session_factory`. By
default, this argument is ``None``, indicating that no session
factory will be configured (and thus accessing ``request.session``
will throw an error) unless ``set_session_factory`` is called later
during configuration.
If ``autocommit`` is ``True``, every method called on the configurator
will cause an immediate action, and no configuration conflict detection
will be used. If ``autocommit`` is ``False``, most methods of the
configurator will defer their action until
:meth:`pyramid.config.Configurator.commit` is called. When
:meth:`pyramid.config.Configurator.commit` is called, the actions implied
by the called methods will be checked for configuration conflicts unless
``autocommit`` is ``True``. If a conflict is detected, a
``ConfigurationConflictError`` will be raised. Calling
:meth:`pyramid.config.Configurator.make_wsgi_app` always implies a final
commit.
If ``default_view_mapper`` is passed, it will be used as the default
:term:`view mapper` factory for view configurations that don't otherwise
specify one (see :class:`pyramid.interfaces.IViewMapperFactory`). If
``default_view_mapper`` is not passed, a superdefault view mapper will be
used.
If ``exceptionresponse_view`` is passed, it must be a :term:`view
callable` or ``None``. If it is a view callable, it will be used as an
exception view callable when an :term:`exception response` is raised. If
``exceptionresponse_view`` is ``None``, no exception response view will
be registered, and all raised exception responses will be bubbled up to
Pyramid's caller. By
default, the ``pyramid.httpexceptions.default_exceptionresponse_view``
function is used as the ``exceptionresponse_view``.
If ``route_prefix`` is passed, all routes added with
:meth:`pyramid.config.Configurator.add_route` will have the specified path
prepended to their pattern.
If ``introspection`` is passed, it must be a boolean value. If it's
``True``, introspection values during actions will be kept for use
for tools like the debug toolbar. If it's ``False``, introspection
values provided by registrations will be ignored. By default, it is
``True``.
.. versionadded:: 1.1
The ``exceptionresponse_view`` argument.
.. versionadded:: 1.2
The ``route_prefix`` argument.
.. versionadded:: 1.3
The ``introspection`` argument.
.. versionadded:: 1.6
The ``root_package`` argument.
The ``response_factory`` argument.
.. versionadded:: 1.9
The ability to use the configurator as a context manager with the
``with``-statement to make threadlocal configuration available for
further configuration with an implicit commit.
"""
manager = manager # for testing injection
venusian = venusian # for testing injection
_ainfo = None
basepath = None
includepath = ()
info = ''
object_description = staticmethod(object_description)
introspectable = Introspectable
inspect = inspect
def __init__(
self,
registry=None,
package=None,
settings=None,
root_factory=None,
authentication_policy=None,
authorization_policy=None,
renderers=None,
debug_logger=None,
locale_negotiator=None,
request_factory=None,
response_factory=None,
default_permission=None,
session_factory=None,
default_view_mapper=None,
autocommit=False,
exceptionresponse_view=default_exceptionresponse_view,
route_prefix=None,
introspection=True,
root_package=None,
):
if package is None:
package = caller_package()
if root_package is None:
root_package = package
name_resolver = DottedNameResolver(package)
self.name_resolver = name_resolver
self.package_name = name_resolver.get_package_name()
self.package = name_resolver.get_package()
self.root_package = root_package
self.registry = registry
self.autocommit = autocommit
self.route_prefix = route_prefix
self.introspection = introspection
if registry is None:
registry = Registry(self.package_name)
self.registry = registry
self.setup_registry(
settings=settings,
root_factory=root_factory,
authentication_policy=authentication_policy,
authorization_policy=authorization_policy,
renderers=renderers,
debug_logger=debug_logger,
locale_negotiator=locale_negotiator,
request_factory=request_factory,
response_factory=response_factory,
default_permission=default_permission,
session_factory=session_factory,
default_view_mapper=default_view_mapper,
exceptionresponse_view=exceptionresponse_view,
)
[docs]
def setup_registry(
self,
settings=None,
root_factory=None,
authentication_policy=None,
authorization_policy=None,
renderers=None,
debug_logger=None,
locale_negotiator=None,
request_factory=None,
response_factory=None,
default_permission=None,
session_factory=None,
default_view_mapper=None,
exceptionresponse_view=default_exceptionresponse_view,
):
"""When you pass a non-``None`` ``registry`` argument to the
:term:`Configurator` constructor, no initial setup is performed
against the registry. This is because the registry you pass in may
have already been initialized for use under :app:`Pyramid` via a
different configurator. However, in some circumstances (such as when
you want to use a global registry instead of a registry created as a
result of the Configurator constructor), or when you want to reset
the initial setup of a registry, you *do* want to explicitly
initialize the registry associated with a Configurator for use under
:app:`Pyramid`. Use ``setup_registry`` to do this initialization.
``setup_registry`` configures settings, a root factory, security
policies, renderers, a debug logger, a locale negotiator, and various
other settings using the configurator's current registry, as per the
descriptions in the Configurator constructor."""
registry = self.registry
self._fix_registry()
self._set_settings(settings)
if isinstance(debug_logger, string_types):
debug_logger = logging.getLogger(debug_logger)
if debug_logger is None:
debug_logger = logging.getLogger(self.package_name)
registry.registerUtility(debug_logger, IDebugLogger)
self.add_default_response_adapters()
self.add_default_renderers()
self.add_default_accept_view_order()
self.add_default_view_predicates()
self.add_default_view_derivers()
self.add_default_route_predicates()
self.add_default_tweens()
self.add_default_security()
if exceptionresponse_view is not None:
exceptionresponse_view = self.maybe_dotted(exceptionresponse_view)
self.add_view(exceptionresponse_view, context=IExceptionResponse)
self.add_view(
exceptionresponse_view, context=WebobWSGIHTTPException
)
# commit below because:
#
# - the default exceptionresponse_view requires the superdefault view
# mapper, so we need to configure it before adding
# default_view_mapper
#
# - superdefault renderers should be overrideable without requiring
# the user to commit before calling config.add_renderer
self.commit()
# self.commit() should not be called within this method after this
# point because the following registrations should be treated as
# analogues of methods called by the user after configurator
# construction. Rationale: user-supplied implementations should be
# preferred rather than add-on author implementations with the help of
# automatic conflict resolution.
if authentication_policy and not authorization_policy:
authorization_policy = ACLAuthorizationPolicy() # default
if authorization_policy:
self.set_authorization_policy(authorization_policy)
if authentication_policy:
self.set_authentication_policy(authentication_policy)
if default_view_mapper is not None:
self.set_view_mapper(default_view_mapper)
if renderers:
for name, renderer in renderers:
self.add_renderer(name, renderer)
if root_factory is not None:
self.set_root_factory(root_factory)
if locale_negotiator:
self.set_locale_negotiator(locale_negotiator)
if request_factory:
self.set_request_factory(request_factory)
if response_factory:
self.set_response_factory(response_factory)
if default_permission:
self.set_default_permission(default_permission)
if session_factory is not None:
self.set_session_factory(session_factory)
tweens = aslist(registry.settings.get('pyramid.tweens', []))
for factory in tweens:
self._add_tween(factory, explicit=True)
includes = aslist(registry.settings.get('pyramid.includes', []))
for inc in includes:
self.include(inc)
def _make_spec(self, path_or_spec):
package, filename = resolve_asset_spec(path_or_spec, self.package_name)
if package is None:
return filename # absolute filename
return '%s:%s' % (package, filename)
def _fix_registry(self):
"""Fix up a ZCA component registry that is not a
pyramid.registry.Registry by adding analogues of ``has_listeners``,
``notify``, ``queryAdapterOrSelf``, and ``registerSelfAdapter``
through monkey-patching."""
_registry = self.registry
if not hasattr(_registry, 'notify'):
def notify(*events):
[_ for _ in _registry.subscribers(events, None)]
_registry.notify = notify
if not hasattr(_registry, 'has_listeners'):
_registry.has_listeners = True
if not hasattr(_registry, 'queryAdapterOrSelf'):
def queryAdapterOrSelf(object, interface, default=None):
if not interface.providedBy(object):
return _registry.queryAdapter(
object, interface, default=default
)
return object
_registry.queryAdapterOrSelf = queryAdapterOrSelf
if not hasattr(_registry, 'registerSelfAdapter'):
def registerSelfAdapter(
required=None,
provided=None,
name=empty,
info=empty,
event=True,
):
return _registry.registerAdapter(
lambda x: x,
required=required,
provided=provided,
name=name,
info=info,
event=event,
)
_registry.registerSelfAdapter = registerSelfAdapter
if not hasattr(_registry, '_lock'):
_registry._lock = threading.Lock()
if not hasattr(_registry, '_clear_view_lookup_cache'):
def _clear_view_lookup_cache():
_registry._view_lookup_cache = {}
_registry._clear_view_lookup_cache = _clear_view_lookup_cache
# API
def _get_introspector(self):
introspector = getattr(self.registry, 'introspector', _marker)
if introspector is _marker:
introspector = Introspector()
self._set_introspector(introspector)
return introspector
def _set_introspector(self, introspector):
self.registry.introspector = introspector
def _del_introspector(self):
del self.registry.introspector
introspector = property(
_get_introspector, _set_introspector, _del_introspector
)
[docs]
def include(self, callable, route_prefix=None):
"""Include a configuration callable, to support imperative
application extensibility.
.. warning:: In versions of :app:`Pyramid` prior to 1.2, this
function accepted ``*callables``, but this has been changed
to support only a single callable.
A configuration callable should be a callable that accepts a single
argument named ``config``, which will be an instance of a
:term:`Configurator`. However, be warned that it will not be the same
configurator instance on which you call this method. The
code which runs as a result of calling the callable should invoke
methods on the configurator passed to it which add configuration
state. The return value of a callable will be ignored.
Values allowed to be presented via the ``callable`` argument to
this method: any callable Python object or any :term:`dotted Python
name` which resolves to a callable Python object. It may also be a
Python :term:`module`, in which case, the module will be searched for
a callable named ``includeme``, which will be treated as the
configuration callable.
For example, if the ``includeme`` function below lives in a module
named ``myapp.myconfig``:
.. code-block:: python
:linenos:
# myapp.myconfig module
def my_view(request):
from pyramid.response import Response
return Response('OK')
def includeme(config):
config.add_view(my_view)
You might cause it to be included within your Pyramid application like
so:
.. code-block:: python
:linenos:
from pyramid.config import Configurator
def main(global_config, **settings):
config = Configurator()
config.include('myapp.myconfig.includeme')
Because the function is named ``includeme``, the function name can
also be omitted from the dotted name reference:
.. code-block:: python
:linenos:
from pyramid.config import Configurator
def main(global_config, **settings):
config = Configurator()
config.include('myapp.myconfig')
Included configuration statements will be overridden by local
configuration statements if an included callable causes a
configuration conflict by registering something with the same
configuration parameters.
If the ``route_prefix`` is supplied, it must be a string. Any calls
to :meth:`pyramid.config.Configurator.add_route` within the included
callable will have their pattern prefixed with the value of
``route_prefix``. This can be used to help mount a set of routes at a
different location than the included callable's author intended, while
still maintaining the same route names. For example:
.. code-block:: python
:linenos:
from pyramid.config import Configurator
def included(config):
config.add_route('show_users', '/show')
def main(global_config, **settings):
config = Configurator()
config.include(included, route_prefix='/users')
In the above configuration, the ``show_users`` route will have an
effective route pattern of ``/users/show``, instead of ``/show``
because the ``route_prefix`` argument will be prepended to the
pattern.
.. versionadded:: 1.2
The ``route_prefix`` parameter.
.. versionchanged:: 1.9
The included function is wrapped with a call to
:meth:`pyramid.config.Configurator.begin` and
:meth:`pyramid.config.Configurator.end` while it is executed.
"""
# """ <-- emacs
action_state = self.action_state
c = self.maybe_dotted(callable)
module = self.inspect.getmodule(c)
if module is c:
try:
c = getattr(module, 'includeme')
except AttributeError:
raise ConfigurationError(
"module %r has no attribute 'includeme'"
% (module.__name__)
)
spec = module.__name__ + ':' + c.__name__
sourcefile = self.inspect.getsourcefile(c)
if sourcefile is None:
raise ConfigurationError(
'No source file for module %r (.py file must exist, '
'refusing to use orphan .pyc or .pyo file).' % module.__name__
)
if action_state.processSpec(spec):
with self.route_prefix_context(route_prefix):
configurator = self.__class__(
registry=self.registry,
package=package_of(module),
root_package=self.root_package,
autocommit=self.autocommit,
route_prefix=self.route_prefix,
)
configurator.basepath = os.path.dirname(sourcefile)
configurator.includepath = self.includepath + (spec,)
self.begin()
try:
c(configurator)
finally:
self.end()
[docs]
def add_directive(self, name, directive, action_wrap=True):
"""
Add a directive method to the configurator.
.. warning:: This method is typically only used by :app:`Pyramid`
framework extension authors, not by :app:`Pyramid` application
developers.
Framework extenders can add directive methods to a configurator by
instructing their users to call ``config.add_directive('somename',
'some.callable')``. This will make ``some.callable`` accessible as
``config.somename``. ``some.callable`` should be a function which
accepts ``config`` as a first argument, and arbitrary positional and
keyword arguments following. It should use config.action as
necessary to perform actions. Directive methods can then be invoked
like 'built-in' directives such as ``add_view``, ``add_route``, etc.
The ``action_wrap`` argument should be ``True`` for directives which
perform ``config.action`` with potentially conflicting
discriminators. ``action_wrap`` will cause the directive to be
wrapped in a decorator which provides more accurate conflict
cause information.
``add_directive`` does not participate in conflict detection, and
later calls to ``add_directive`` will override earlier calls.
"""
c = self.maybe_dotted(directive)
if not hasattr(self.registry, '_directives'):
self.registry._directives = {}
self.registry._directives[name] = (c, action_wrap)
def __getattr__(self, name):
# allow directive extension names to work
directives = getattr(self.registry, '_directives', {})
c = directives.get(name)
if c is None:
raise AttributeError(name)
c, action_wrap = c
if action_wrap:
c = action_method(c)
# Create a bound method (works on both Py2 and Py3)
# http://stackoverflow.com/a/1015405/209039
m = c.__get__(self, self.__class__)
return m
[docs]
def with_package(self, package):
"""Return a new Configurator instance with the same registry
as this configurator. ``package`` may be an actual Python package
object or a :term:`dotted Python name` representing a package."""
configurator = self.__class__(
registry=self.registry,
package=package,
root_package=self.root_package,
autocommit=self.autocommit,
route_prefix=self.route_prefix,
introspection=self.introspection,
)
configurator.basepath = self.basepath
configurator.includepath = self.includepath
configurator.info = self.info
return configurator
[docs]
def maybe_dotted(self, dotted):
"""Resolve the :term:`dotted Python name` ``dotted`` to a
global Python object. If ``dotted`` is not a string, return
it without attempting to do any name resolution. If
``dotted`` is a relative dotted name (e.g. ``.foo.bar``,
consider it relative to the ``package`` argument supplied to
this Configurator's constructor."""
return self.name_resolver.maybe_resolve(dotted)
[docs]
def absolute_asset_spec(self, relative_spec):
"""Resolve the potentially relative :term:`asset
specification` string passed as ``relative_spec`` into an
absolute asset specification string and return the string.
Use the ``package`` of this configurator as the package to
which the asset specification will be considered relative
when generating an absolute asset specification. If the
provided ``relative_spec`` argument is already absolute, or if
the ``relative_spec`` is not a string, it is simply returned."""
if not isinstance(relative_spec, string_types):
return relative_spec
return self._make_spec(relative_spec)
absolute_resource_spec = absolute_asset_spec # b/w compat forever
[docs]
def begin(self, request=_marker):
"""Indicate that application or test configuration has begun.
This pushes a dictionary containing the :term:`application
registry` implied by ``registry`` attribute of this
configurator and the :term:`request` implied by the
``request`` argument onto the :term:`thread local` stack
consulted by various :mod:`pyramid.threadlocal` API
functions.
If ``request`` is not specified and the registry owned by the
configurator is already pushed as the current threadlocal registry
then this method will keep the current threadlocal request unchanged.
.. versionchanged:: 1.8
The current threadlocal request is propagated if the current
threadlocal registry remains unchanged.
"""
if request is _marker:
current = self.manager.get()
if current['registry'] == self.registry:
request = current['request']
else:
request = None
self.manager.push({'registry': self.registry, 'request': request})
[docs]
def end(self):
"""Indicate that application or test configuration has ended.
This pops the last value pushed onto the :term:`thread local`
stack (usually by the ``begin`` method) and returns that
value.
"""
return self.manager.pop()
def __enter__(self):
self.begin()
return self
def __exit__(self, exc_type, exc_value, exc_traceback):
self.end()
if exc_value is None:
self.commit()
# this is *not* an action method (uses caller_package)
[docs]
def scan(
self, package=None, categories=None, onerror=None, ignore=None, **kw
):
"""Scan a Python package and any of its subpackages for objects
marked with :term:`configuration decoration` such as
:class:`pyramid.view.view_config`. Any decorated object found will
influence the current configuration state.
The ``package`` argument should be a Python :term:`package` or module
object (or a :term:`dotted Python name` which refers to such a
package or module). If ``package`` is ``None``, the package of the
*caller* is used.
The ``categories`` argument, if provided, should be the
:term:`Venusian` 'scan categories' to use during scanning. Providing
this argument is not often necessary; specifying scan categories is
an extremely advanced usage. By default, ``categories`` is ``None``
which will execute *all* Venusian decorator callbacks including
:app:`Pyramid`-related decorators such as
:class:`pyramid.view.view_config`. See the :term:`Venusian`
documentation for more information about limiting a scan by using an
explicit set of categories.
The ``onerror`` argument, if provided, should be a Venusian
``onerror`` callback function. The onerror function is passed to
:meth:`venusian.Scanner.scan` to influence error behavior when an
exception is raised during the scanning process. See the
:term:`Venusian` documentation for more information about ``onerror``
callbacks.
The ``ignore`` argument, if provided, should be a Venusian ``ignore``
value. Providing an ``ignore`` argument allows the scan to ignore
particular modules, packages, or global objects during a scan.
``ignore`` can be a string or a callable, or a list containing
strings or callables. The simplest usage of ``ignore`` is to provide
a module or package by providing a full path to its dotted name. For
example: ``config.scan(ignore='my.module.subpackage')`` would ignore
the ``my.module.subpackage`` package during a scan, which would
prevent the subpackage and any of its submodules from being imported
and scanned. See the :term:`Venusian` documentation for more
information about the ``ignore`` argument.
To perform a ``scan``, Pyramid creates a Venusian ``Scanner`` object.
The ``kw`` argument represents a set of keyword arguments to pass to
the Venusian ``Scanner`` object's constructor. See the
:term:`venusian` documentation (its ``Scanner`` class) for more
information about the constructor. By default, the only keyword
arguments passed to the Scanner constructor are ``{'config':self}``
where ``self`` is this configurator object. This services the
requirement of all built-in Pyramid decorators, but extension systems
may require additional arguments. Providing this argument is not
often necessary; it's an advanced usage.
.. versionadded:: 1.1
The ``**kw`` argument.
.. versionadded:: 1.3
The ``ignore`` argument.
"""
package = self.maybe_dotted(package)
if package is None: # pragma: no cover
package = caller_package()
ctorkw = {'config': self}
ctorkw.update(kw)
scanner = self.venusian.Scanner(**ctorkw)
scanner.scan(
package, categories=categories, onerror=onerror, ignore=ignore
)
[docs]
def make_wsgi_app(self):
"""Commits any pending configuration statements, sends a
:class:`pyramid.events.ApplicationCreated` event to all listeners,
adds this configuration's registry to
:attr:`pyramid.config.global_registries`, and returns a
:app:`Pyramid` WSGI application representing the committed
configuration state."""
self.commit()
app = Router(self.registry)
# Allow tools like "pshell development.ini" to find the 'last'
# registry configured.
global_registries.add(self.registry)
# Push the registry onto the stack in case any code that depends on
# the registry threadlocal APIs used in listeners subscribed to the
# IApplicationCreated event.
self.begin()
try:
self.registry.notify(ApplicationCreated(app))
finally:
self.end()
return app
global_registries = WeakOrderedSet()
