Hi all!
Currently django views do not accept dataclasses as context.
I stumbled about this because I wanted to do something like this:
@cached_property
def extra_context(self):
data = MyDataClass(...)
...
return data
Unfortunately, this is unpacked by get_context_data and throws an error
because a dataclass can't be iterated (core code):
def get_context_data(self, **kwargs):
kwargs.setdefault('view', self)
if self.extra_context is not None:
kwargs.update(self.extra_context)
return kwargs
I know I could do a asdict(data)inside the `extra_context` but with the
transformation to a dict, I will lose all my typesafety, e.g.:
def get_template_names(self):
if self.extra_context.somedata: # << somedata is typed
...
A simple check for dataclass would be nice (
https://docs.python.org/3/library/dataclasses.html#dataclasses.is_dataclass
):
def get_context_data(self, **kwargs):
kwargs.setdefault('view', self)
if self.extra_context is not None:
if is_dataclass(self.extra_context) and not
isinstance(self.extra_context, type):
kwargs.update(asdict(self.extra_context))
else:
kwargs.update(self.extra_context)
return kwargs
Kind regards!
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