Applying custom manager methods on querysets

[cesco]

Hi,

in django we can chain multiple filter methods like:

MyModel.objects.filter(field1__exact=value1).filter(field2__exact=value2)

but I'd like to be able to chain custom filter methods defined by
extending the models.Manager class.
For example:

MyModel.objects.filter(field1__exact=value1).my_filter(field2)

In other words I'd like to be able to apply the filter directly to a
queryset and not only to MyModel.objects.

Do you have any suggestion on how to accomplish that?

Thanks a lot
Francesco

[Malcolm Tredinnick]

Sub-class the QuerySet class and have your model's manager return your
subclass as the result of get_query_set() rather than the current
QuerySet instance that is returned.

Look in django/db/models/manager.py for the default manager behaviour
and write something similar for get_query_set().

Regards,
Malcolm

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