Hi,
currently I am writing a Django applications built up from loosely coupled
plug-ins. Each of these plug-ins shall offer a class based view to handle
get and post requests. For get requests the context shall be populated with
plug-in specific data. For post requests, the plug-in specific posted data
shall be handled by the corresponding view class.
This of course is not difficult to achieve. The view class of the final
app, which combines all these plugins, can overload the methods
get_context_data() and post() and dispatch the requests to functions
offered by these plug-ins. But I do not like this approach because it does
not separate concerns and the author of the final app has to remember, how
to dispatch these requests manually to the plug-ins.
My question is, if there is there a more elegant solution, say a pattern,
which does not require to duplicate the dispatching code for the mixin
classes?
Let me explain using some sample code:
class MainAppDetailView(SomeBaseDetailView, PluginAMixin, PluginBMixin):
model = MyModel
template_name = "my_detail.html"
def get_context_data(self, **kwargs):
context = super(FinalAppDetailView, self).get_context_data(**kwargs)
PluginAMixin(self).update_context(context)
PluginBMixin(self).update_context(context)
return context
def post(self, *args, **kwargs):
post_request = self.request.POST
response = PluginAMixin(self).handle_post(post_request)
if issubclass(response, HTTPResponse):
return response
response = PluginBMixin(self).handle_post(post_request)
if issubclass(response, HTTPResponse):
return response
# handle post request for the main app
...
return response
For my point of view this example contains too much code duplication. Is
there a pattern, so that I only have to modify the class declaration of my
FinalAppDetailView or even better, only in my settings.py?
Cheers, Jacob
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