Everything you wanted to know
about the Django framework
from django.views.generic.edit import ProcessFormView
Render a form on GET and processes it on POST.
| Определено в | |
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http_method_names = ['get', 'post', 'put', 'patch', 'delete', 'head', 'options', 'trace']
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View |
Constructor. Called in the URLconf; can contain helpful extra keyword arguments, and other things.
38 39 40 41 42 43 44 45 46 | def __init__(self, **kwargs):
"""
Constructor. Called in the URLconf; can contain helpful extra
keyword arguments, and other things.
"""
# Go through keyword arguments, and either save their values to our
# instance, or raise an error.
for key, value in kwargs.items():
setattr(self, key, value)
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113 114 | def _allowed_methods(self):
return [m.upper() for m in self.http_method_names if hasattr(self, m)]
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Main entry point for a request-response process.
48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 | @classonlymethod
def as_view(cls, **initkwargs):
"""Main entry point for a request-response process."""
for key in initkwargs:
if key in cls.http_method_names:
raise TypeError("You tried to pass in the %s method name as a "
"keyword argument to %s(). Don't do that."
% (key, cls.__name__))
if not hasattr(cls, key):
raise TypeError("%s() received an invalid keyword %r. as_view "
"only accepts arguments that are already "
"attributes of the class." % (cls.__name__, key))
def view(request, *args, **kwargs):
self = cls(**initkwargs)
if hasattr(self, 'get') and not hasattr(self, 'head'):
self.head = self.get
self.setup(request, *args, **kwargs)
if not hasattr(self, 'request'):
raise AttributeError(
"%s instance has no 'request' attribute. Did you override "
"setup() and forget to call super()?" % cls.__name__
)
return self.dispatch(request, *args, **kwargs)
view.view_class = cls
view.view_initkwargs = initkwargs
# take name and docstring from class
update_wrapper(view, cls, updated=())
# and possible attributes set by decorators
# like csrf_exempt from dispatch
update_wrapper(view, cls.dispatch, assigned=())
return view
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89 90 91 92 93 94 95 96 97 | def dispatch(self, request, *args, **kwargs):
# Try to dispatch to the right method; if a method doesn't exist,
# defer to the error handler. Also defer to the error handler if the
# request method isn't on the approved list.
if request.method.lower() in self.http_method_names:
handler = getattr(self, request.method.lower(), self.http_method_not_allowed)
else:
handler = self.http_method_not_allowed
return handler(request, *args, **kwargs)
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Handle GET requests: instantiate a blank version of the form.
131 132 133 | def get(self, request, *args, **kwargs):
"""Handle GET requests: instantiate a blank version of the form."""
return self.render_to_response(self.get_context_data())
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99 100 101 102 103 104 | def http_method_not_allowed(self, request, *args, **kwargs):
logger.warning(
'Method Not Allowed (%s): %s', request.method, request.path,
extra={'status_code': 405, 'request': request}
)
return HttpResponseNotAllowed(self._allowed_methods())
|
Handle responding to requests for the OPTIONS HTTP verb.
106 107 108 109 110 111 | def options(self, request, *args, **kwargs):
"""Handle responding to requests for the OPTIONS HTTP verb."""
response = HttpResponse()
response['Allow'] = ', '.join(self._allowed_methods())
response['Content-Length'] = '0'
return response
|
Handle POST requests: instantiate a form instance with the passed POST variables and then check if it's valid.
135 136 137 138 139 140 141 142 143 144 | def post(self, request, *args, **kwargs):
"""
Handle POST requests: instantiate a form instance with the passed
POST variables and then check if it's valid.
"""
form = self.get_form()
if form.is_valid():
return self.form_valid(form)
else:
return self.form_invalid(form)
|
148 149 | def put(self, *args, **kwargs):
return self.post(*args, **kwargs)
|
Initialize attributes shared by all view methods.
83 84 85 86 87 | def setup(self, request, *args, **kwargs):
"""Initialize attributes shared by all view methods."""
self.request = request
self.args = args
self.kwargs = kwargs
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