我使用Django 1.11来创建一个网站 . 当我运行本地主机http://127.0.0.1:8000/然后错误"TypeError at / Context must be dict rather than unicode. "我不知道如何解决它 .
违规行:make_context中的\ venv \ lib \ site-packages \ django \ template \ context.py,第287行
context.py的整个视图代码从复制导入副本的contextlib import contextmanager导入警告
来自django.utils.deprecation import RemovedInDjango20Warning
硬编码处理器,更易于使用CSRF保护 .
_builtin_context_processors =('django.template.context_processors.csrf',)
class ContextPopException(Exception):“pop()被调用的次数多于push()”pass
class ContextDict(dict):def init (self,context,* args,** kwargs):super(ContextDict,self) . init (* args,** kwargs)
context.dicts.append(self)
self.context = context
def __enter__(self):
return self
def __exit__(self, *args, **kwargs):
self.context.pop()
class BaseContext(object):def init (self,dict_ = None):self.reset_dicts(dict)
def _reset_dicts(self, value=None):
builtins = {'True': True, 'False': False, 'None': None}
self.dicts = [builtins]
if value is not None:
self.dicts.append(value)
def __copy__(self):
duplicate = copy(super(BaseContext, self))
duplicate.dicts = self.dicts[:]
return duplicate
def __repr__(self):
return repr(self.dicts)
def __iter__(self):
for d in reversed(self.dicts):
yield d
def push(self, *args, **kwargs):
dicts = []
for d in args:
if isinstance(d, BaseContext):
dicts += d.dicts[1:]
else:
dicts.append(d)
return ContextDict(self, *dicts, **kwargs)
def pop(self):
if len(self.dicts) == 1:
raise ContextPopException
return self.dicts.pop()
def __setitem__(self, key, value):
"Set a variable in the current context"
self.dicts[-1][key] = value
def set_upward(self, key, value):
"""
Set a variable in one of the higher contexts if it exists there,
otherwise in the current context.
"""
context = self.dicts[-1]
for d in reversed(self.dicts):
if key in d.keys():
context = d
break
context[key] = value
def __getitem__(self, key):
"Get a variable's value, starting at the current context and going upward"
for d in reversed(self.dicts):
if key in d:
return d[key]
raise KeyError(key)
def __delitem__(self, key):
"Delete a variable from the current context"
del self.dicts[-1][key]
def has_key(self, key):
warnings.warn(
"%s.has_key() is deprecated in favor of the 'in' operator." % self.__class__.__name__,
RemovedInDjango20Warning
)
return key in self
def __contains__(self, key):
for d in self.dicts:
if key in d:
return True
return False
def get(self, key, otherwise=None):
for d in reversed(self.dicts):
if key in d:
return d[key]
return otherwise
def setdefault(self, key, default=None):
try:
return self[key]
except KeyError:
self[key] = default
return default
def new(self, values=None):
"""
Returns a new context with the same properties, but with only the
values given in 'values' stored.
"""
new_context = copy(self)
new_context._reset_dicts(values)
return new_context
def flatten(self):
"""
Returns self.dicts as one dictionary
"""
flat = {}
for d in self.dicts:
flat.update(d)
return flat
def __eq__(self, other):
"""
Compares two contexts by comparing theirs 'dicts' attributes.
"""
if isinstance(other, BaseContext):
# because dictionaries can be put in different order
# we have to flatten them like in templates
return self.flatten() == other.flatten()
# if it's not comparable return false
return False
class Context(BaseContext):"A stack container for variable context"def init (self,dict_ = None,autoescape = True,use_l10n = None,use_tz = None):self.autoescape = autoescape self.use_l10n = use_l10n self.use_tz = use_tz self.template_name = "unknown" self .render_context = RenderContext()#设置为原始模板 - 与扩展或包含的#templates相对 - 在渲染过程中,请参阅bind_template . self.template =无超级(上下文,自我) . init (dict_)
@contextmanager
def bind_template(self, template):
if self.template is not None:
raise RuntimeError("Context is already bound to a template")
self.template = template
try:
yield
finally:
self.template = None
def __copy__(self):
duplicate = super(Context, self).__copy__()
duplicate.render_context = copy(self.render_context)
return duplicate
def update(self, other_dict):
"Pushes other_dict to the stack of dictionaries in the Context"
if not hasattr(other_dict, '__getitem__'):
raise TypeError('other_dict must be a mapping (dictionary-like) object.')
if isinstance(other_dict, BaseContext):
other_dict = other_dict.dicts[1:].pop()
return ContextDict(self, other_dict)
class RenderContext(BaseContext):“”“用于存储模板状态的堆栈容器 .
RenderContext simplifies the implementation of template Nodes by providing a
safe place to store state between invocations of a node's `render` method.
The RenderContext also provides scoping rules that are more sensible for
'template local' variables. The render context stack is pushed before each
template is rendered, creating a fresh scope with nothing in it. Name
resolution fails if a variable is not found at the top of the RequestContext
stack. Thus, variables are local to a specific template and don't affect the
rendering of other templates as they would if they were stored in the normal
template context.
"""
template = None
def __iter__(self):
for d in self.dicts[-1]:
yield d
def __contains__(self, key):
return key in self.dicts[-1]
def get(self, key, otherwise=None):
return self.dicts[-1].get(key, otherwise)
def __getitem__(self, key):
return self.dicts[-1][key]
@contextmanager
def push_state(self, template, isolated_context=True):
initial = self.template
self.template = template
if isolated_context:
self.push()
try:
yield
finally:
self.template = initial
if isolated_context:
self.pop()
class RequestContext(Context):“”" This subclass of template.Context automatically populates itself using the processors defined in the engine's configuration. Additional processors can be specified as a list of callables using the " processors " keyword argument. "“”def init (self,request,dict_ = None,processors = None,use_l10n = None,use_tz = None,autoescape = True):super(RequestContext,self) . init (dict_,use_l10n = use_l10n,use_tz = use_tz,autoescape = autoescape)self.request =请求self._processors =()如果处理器是None否则tuple(处理器)self._processors_index = len(self.dicts)
# placeholder for context processors output
self.update({})
# empty dict for any new modifications
# (so that context processors don't overwrite them)
self.update({})
@contextmanager
def bind_template(self, template):
if self.template is not None:
raise RuntimeError("Context is already bound to a template")
self.template = template
# Set context processors according to the template engine's settings.
processors = (template.engine.template_context_processors +
self._processors)
updates = {}
for processor in processors:
updates.update(processor(self.request))
self.dicts[self._processors_index] = updates
try:
yield
finally:
self.template = None
# Unset context processors.
self.dicts[self._processors_index] = {}
def new(self, values=None):
new_context = super(RequestContext, self).new(values)
# This is for backwards-compatibility: RequestContexts created via
# Context.new don't include values from context processors.
if hasattr(new_context, '_processors_index'):
del new_context._processors_index
return new_context
def make_context(context,request = None,** kwargs):“”" Create a suitable Context from a plain dict and optionally an HttpRequest. "“”如果context不是None而不是isinstance(context,dict):引发TypeError('context must be a dict rather than %s.'%context . class . name )// 287 if request is无:context = Context(context,** kwargs)else:#需要以下模式来确保#conference中的值覆盖模板上下文处理器中的值 . original_context = context context = RequestContext(request,** kwargs)如果original_context:context.push(original_context)返回context
1 回答
将上下文传递给模板的位置确保它是字典而不是字符串