#5833: Custom FilterSpecs
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Reporter: Honza_Kral | Owner: jkocherhans
Status: assigned | Milestone:
Component: django.contrib.admin | Version: SVN
Resolution: | Keywords: nfa-someday
list_filter filterspec nfa-changelist ep2008
Stage: Accepted | Has_patch: 1
Needs_docs: 1 | Needs_tests: 1
Needs_better_patch: 0 |
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Comment (by subsume):
Multiple filter specs won't become a problem until this feature is
implemented. Right now, list_filter only accepts fields on the model in
question. With this proposal FilterSpecs will now be opened up to conduct
querying on related fields.
Concrete example: Take a situation where you have Person and related to it
is a StaffContact. You have Person registered in Admin and you create two
FilterSpecs, one called 'Contacted by' (which looks at the user field of
StaffContact) and another called 'Contact range' (which looks at the field
of StaffContact). Using these two fields together based on this
implementation, chained fields can't give you all Person objects who were
contacted by BOTH a particular staff person AND a particular date range,
which might very well be preferable. Two JOINs will be created by this
proposal, whereas you may have wanted one.
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Ticket URL: <http://code.djangoproject.com/ticket/5833#comment:76>
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