def csrf(request):
"""
Context processor that provides a CSRF token, or the string 'NOTPROVIDED' if
it has not been provided by either a view decorator or the middleware
"""
def _get_val():
token = get_token(request)
if token is None:
# In order to be able to provide debugging info in the
# case of misconfiguration, we use a sentinel value
# instead of returning an empty dict.
return 'NOTPROVIDED'
else:
return smart_text(token)
_get_val = lazy(_get_val, six.text_type)
return {'csrf_token': _get_val() }
python类lazy()的实例源码
def debug(request):
"""
Returns context variables helpful for debugging.
"""
context_extras = {}
if settings.DEBUG and request.META.get('REMOTE_ADDR') in settings.INTERNAL_IPS:
context_extras['debug'] = True
from django.db import connection
# Return a lazy reference that computes connection.queries on access,
# to ensure it contains queries triggered after this function runs.
context_extras['sql_queries'] = lazy(lambda: connection.queries, list)
return context_extras
def lazy_number(func, resultclass, number=None, **kwargs):
if isinstance(number, six.integer_types):
kwargs['number'] = number
proxy = lazy(func, resultclass)(**kwargs)
else:
original_kwargs = kwargs.copy()
class NumberAwareString(resultclass):
def __mod__(self, rhs):
if isinstance(rhs, dict) and number:
try:
number_value = rhs[number]
except KeyError:
raise KeyError('Your dictionary lacks key \'%s\'. '
'Please provide it, because it is required to '
'determine whether string is singular or plural.'
% number)
else:
number_value = rhs
kwargs['number'] = number_value
translated = func(**kwargs)
try:
translated = translated % rhs
except TypeError:
# String doesn't contain a placeholder for the number
pass
return translated
proxy = lazy(lambda **kwargs: NumberAwareString(), NumberAwareString)(**kwargs)
proxy.__reduce__ = lambda: (_lazy_number_unpickle, (func, resultclass, number, original_kwargs))
return proxy
def override_gettext(real_translation):
"""Replace Django's translation functions with safe versions."""
translation.gettext = real_translation.gettext
translation.ugettext = real_translation.ugettext
translation.ngettext = real_translation.ngettext
translation.ungettext = real_translation.ungettext
translation.gettext_lazy = lazy(real_translation.gettext, str)
translation.ugettext_lazy = lazy(real_translation.ugettext, unicode)
translation.ngettext_lazy = lazy(real_translation.ngettext, str)
translation.ungettext_lazy = lazy(real_translation.ungettext, unicode)
def patch_reverse():
"""Overwrite the default reverse implementation.
Monkey-patches the urlresolvers.reverse function. Will not patch twice.
"""
global django_reverse, django_reverse_lazy
if hasattr(settings, 'REVERSE_METHOD') and django_reverse is None:
django_reverse = urls.reverse
django_reverse_lazy = urls.reverse_lazy
module_name, func_name = settings.REVERSE_METHOD.rsplit('.', 1)
reverse = getattr(importlib.import_module(module_name), func_name)
urls.reverse = reverse
urls.reverse_lazy = lazy(reverse, six.text_type)
def get_actions(self):
resolved = self.RESOLVED.copy()
resolved['help_text'] = lazy(
lambda: self.RESOLVED['help_text'] + self.creator_assign_text()
)
reopened = self.REOPENED.copy()
reopened['help_text'] = lazy(
lambda: self.REOPENED['help_text'] + self.resolver_assign_text()
)
verified = self.VERIFIED.copy()
verified['help_text'] = lazy(
lambda: self.VERIFIED['help_text'] + self.resolver_assign_text()
)
if self.bug:
state = self.bug.state
else:
state = None
if state == State.NEW:
return [self.COMMENT, resolved, self.ENTRUSTED]
elif state == State.ENTRUSTED:
return [self.COMMENT, resolved]
elif state in self.RESOLVED_STATES:
return [self.COMMENT, verified, reopened, self.LIVE, self.CLOSED]
elif state == State.REOPENED:
return [self.COMMENT, resolved, self.ENTRUSTED]
elif state == State.LIVE:
return [self.COMMENT, reopened, self.CLOSED]
elif state == State.CLOSED:
return [self.COMMENT, reopened]
elif state == State.VERIFIED:
return [self.COMMENT, reopened, self.LIVE, self.CLOSED]
elif state is None:
return [
{'action': 'create', 'label': 'Create', 'help_text': "Create a bug."},
]
else:
assert False, 'Unknown state %s' % state
def __init__(self, target_model, filter_name=None, **kwargs):
super(ModelChooserBlock, self).__init__(**kwargs)
self._target_model = target_model
self.filter_name = filter_name
if self.meta.icon == 'placeholder':
# Get the icon from the chooser.
# The chooser may not have been registered yet, depending upon
# import orders and things, so get the icon lazily
self.meta.icon = lazy(lambda: self.chooser.icon, str)()
def debug(request):
"""
Returns context variables helpful for debugging.
"""
context_extras = {}
if settings.DEBUG and request.META.get('REMOTE_ADDR') in settings.INTERNAL_IPS:
context_extras['debug'] = True
from django.db import connections
# Return a lazy reference that computes connection.queries on access,
# to ensure it contains queries triggered after this function runs.
context_extras['sql_queries'] = lazy(
lambda: list(itertools.chain(*[connections[x].queries for x in connections])),
list
)
return context_extras
def lazy_number(func, resultclass, number=None, **kwargs):
if isinstance(number, six.integer_types):
kwargs['number'] = number
proxy = lazy(func, resultclass)(**kwargs)
else:
original_kwargs = kwargs.copy()
class NumberAwareString(resultclass):
def __bool__(self):
return bool(kwargs['singular'])
def __nonzero__(self): # Python 2 compatibility
return type(self).__bool__(self)
def __mod__(self, rhs):
if isinstance(rhs, dict) and number:
try:
number_value = rhs[number]
except KeyError:
raise KeyError(
"Your dictionary lacks key '%s\'. Please provide "
"it, because it is required to determine whether "
"string is singular or plural." % number
)
else:
number_value = rhs
kwargs['number'] = number_value
translated = func(**kwargs)
try:
translated = translated % rhs
except TypeError:
# String doesn't contain a placeholder for the number
pass
return translated
proxy = lazy(lambda **kwargs: NumberAwareString(), NumberAwareString)(**kwargs)
proxy.__reduce__ = lambda: (_lazy_number_unpickle, (func, resultclass, number, original_kwargs))
return proxy
def test_find_item_lazy(self):
lazy_attribute = lazy(lambda x: x, str)('Test')
api = ToolbarAPIMixin()
api.add_link_item(lazy_attribute, None)
result = api.find_first(LinkItem, name='Test')
self.assertNotEqual(result, None)
self.assertEqual(result.index, 0)
def debug(request):
"""
Returns context variables helpful for debugging.
"""
context_extras = {}
if settings.DEBUG and request.META.get('REMOTE_ADDR') in settings.INTERNAL_IPS:
context_extras['debug'] = True
from django.db import connections
# Return a lazy reference that computes connection.queries on access,
# to ensure it contains queries triggered after this function runs.
context_extras['sql_queries'] = lazy(
lambda: list(itertools.chain(*[connections[x].queries for x in connections])),
list
)
return context_extras
def lazy_number(func, resultclass, number=None, **kwargs):
if isinstance(number, six.integer_types):
kwargs['number'] = number
proxy = lazy(func, resultclass)(**kwargs)
else:
original_kwargs = kwargs.copy()
class NumberAwareString(resultclass):
def __bool__(self):
return bool(kwargs['singular'])
def __nonzero__(self): # Python 2 compatibility
return type(self).__bool__(self)
def __mod__(self, rhs):
if isinstance(rhs, dict) and number:
try:
number_value = rhs[number]
except KeyError:
raise KeyError(
"Your dictionary lacks key '%s\'. Please provide "
"it, because it is required to determine whether "
"string is singular or plural." % number
)
else:
number_value = rhs
kwargs['number'] = number_value
translated = func(**kwargs)
try:
translated = translated % rhs
except TypeError:
# String doesn't contain a placeholder for the number
pass
return translated
proxy = lazy(lambda **kwargs: NumberAwareString(), NumberAwareString)(**kwargs)
proxy.__reduce__ = lambda: (_lazy_number_unpickle, (func, resultclass, number, original_kwargs))
return proxy
def debug(request):
"""
Returns context variables helpful for debugging.
"""
context_extras = {}
if settings.DEBUG and request.META.get('REMOTE_ADDR') in settings.INTERNAL_IPS:
context_extras['debug'] = True
from django.db import connection
# Return a lazy reference that computes connection.queries on access,
# to ensure it contains queries triggered after this function runs.
context_extras['sql_queries'] = lazy(lambda: connection.queries, list)
return context_extras
def lazy_number(func, resultclass, number=None, **kwargs):
if isinstance(number, six.integer_types):
kwargs['number'] = number
proxy = lazy(func, resultclass)(**kwargs)
else:
original_kwargs = kwargs.copy()
class NumberAwareString(resultclass):
def __mod__(self, rhs):
if isinstance(rhs, dict) and number:
try:
number_value = rhs[number]
except KeyError:
raise KeyError('Your dictionary lacks key \'%s\'. '
'Please provide it, because it is required to '
'determine whether string is singular or plural.'
% number)
else:
number_value = rhs
kwargs['number'] = number_value
translated = func(**kwargs)
try:
translated = translated % rhs
except TypeError:
# String doesn't contain a placeholder for the number
pass
return translated
proxy = lazy(lambda **kwargs: NumberAwareString(), NumberAwareString)(**kwargs)
proxy.__reduce__ = lambda: (_lazy_number_unpickle, (func, resultclass, number, original_kwargs))
return proxy
def _lazy_get_settings(opt, ttype, default_value=obj):
return lazy(_call_getattr, ttype)(opt, default_value)
# Lazyly read configurations to allow @override_settings
def debug(request):
"""
Returns context variables helpful for debugging.
"""
context_extras = {}
if settings.DEBUG and request.META.get('REMOTE_ADDR') in settings.INTERNAL_IPS:
context_extras['debug'] = True
from django.db import connection
# Return a lazy reference that computes connection.queries on access,
# to ensure it contains queries triggered after this function runs.
context_extras['sql_queries'] = lazy(lambda: connection.queries, list)
return context_extras
def lazy_number(func, resultclass, number=None, **kwargs):
if isinstance(number, six.integer_types):
kwargs['number'] = number
proxy = lazy(func, resultclass)(**kwargs)
else:
original_kwargs = kwargs.copy()
class NumberAwareString(resultclass):
def __mod__(self, rhs):
if isinstance(rhs, dict) and number:
try:
number_value = rhs[number]
except KeyError:
raise KeyError('Your dictionary lacks key \'%s\'. '
'Please provide it, because it is required to '
'determine whether string is singular or plural.'
% number)
else:
number_value = rhs
kwargs['number'] = number_value
translated = func(**kwargs)
try:
translated = translated % rhs
except TypeError:
# String doesn't contain a placeholder for the number
pass
return translated
proxy = lazy(lambda **kwargs: NumberAwareString(), NumberAwareString)(**kwargs)
proxy.__reduce__ = lambda: (_lazy_number_unpickle, (func, resultclass, number, original_kwargs))
return proxy
def debug(request):
"""
Returns context variables helpful for debugging.
"""
context_extras = {}
if settings.DEBUG and request.META.get('REMOTE_ADDR') in settings.INTERNAL_IPS:
context_extras['debug'] = True
from django.db import connection
# Return a lazy reference that computes connection.queries on access,
# to ensure it contains queries triggered after this function runs.
context_extras['sql_queries'] = lazy(lambda: connection.queries, list)
return context_extras
def lazy_number(func, resultclass, number=None, **kwargs):
if isinstance(number, six.integer_types):
kwargs['number'] = number
proxy = lazy(func, resultclass)(**kwargs)
else:
class NumberAwareString(resultclass):
def __mod__(self, rhs):
if isinstance(rhs, dict) and number:
try:
number_value = rhs[number]
except KeyError:
raise KeyError('Your dictionary lacks key \'%s\'. '
'Please provide it, because it is required to '
'determine whether string is singular or plural.'
% number)
else:
number_value = rhs
kwargs['number'] = number_value
translated = func(**kwargs)
try:
translated = translated % rhs
except TypeError:
# String doesn't contain a placeholder for the number
pass
return translated
proxy = lazy(lambda **kwargs: NumberAwareString(), NumberAwareString)(**kwargs)
return proxy
