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PODjango: extend get_object for class-based views
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  1. PODjango: extend get_object for class-based views
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    copied!<p>Being a non-expert Python programmer, I'm looking for feedback on the way I extended the get_object method of Django's SingleObjectMixin class.</p> <p>For most of my Detail views, the lookup with a pk or slugfield is fine - but in some cases, I need to retrieve the object based on other (unique) fields, e.g. "username". I subclassed Django's DetailView and modified the get_object method as follows:</p> <pre><code># extend the method of getting single objects, depending on model def get_object(self, queryset=None): if self.model != mySpecialModel: # Call the superclass and do business as usual obj = super(ObjectDetail, self).get_object() return obj else: # add specific field lookups for single objects, i.e. mySpecialModel if queryset is None: queryset = self.get_queryset() username = self.kwargs.get('username', None) if username is not None: queryset = queryset.filter(user__username=username) # If no username defined, it's an error. else: raise AttributeError(u"This generic detail view %s must be called with " u"an username for the researcher." % self.__class__.__name__) try: obj = queryset.get() except ObjectDoesNotExist: raise Http404(_(u"No %(verbose_name)s found matching the query") % {'verbose_name': queryset.model._meta.verbose_name}) return obj </code></pre> <p>Is this good practise? I try to have one Subclass of Detailview, which adjusts to differing needs when different objects are to be retrieved - but which also maintains the default behavior for the common cases. Or is it better to have more subclasses for the special cases?</p> <p>Thanks for your advice!</p>
 

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