#16609: Admin searches produce duplicate results if search_fields contains M2M
traversals
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Reporter: cheater00@… | Owner: nobody
Type: Bug | Status: new
Milestone: | Component:
Version: SVN | contrib.admin
Keywords: search_fields m2m duplicate | Severity: Normal
duplicates | Triage Stage:
Has patch: 0 | Unreviewed
UI/UX: 0 | Easy pickings: 0
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I believe this has already been touched upon in #15819, however the
consensus (comment ticket:15819#comment:13) was
"For people in situations where .distinct() is broken for whatever reason,
the workaround here is simple: don't use search_fields with relations in a
way that triggers it."
I couldn't find a ticket for this, so here it is.
In my case, I am searching for a keyword which is found in a search_fields
item that isn't traversing M2M. When search_fields also contains a M2M
traversal, I get duplicate results.
In my case - this might be relevant or not - I am traversing a ForeignKey
first and then an M2M field in that problematic search_fields entry, e.g:
search_fields = ['=id', '=fkmodel__m2mmodel__name']
This happens even though the string is not matched by
fkmodel__m2mmodel__name, only by id.
This might not be clear, this is what the model relations look like:
(Model SearchedModel) --ForeignKey--> (Model FKModel) --ManyToMany-->
(Model M2MModel)
M2MModel contains the name field that I have specified in search_fields.
This might or might not be related to #15559.
I have tested this against 1.3, yesterday's 1.3.X, and yesterday's dev and
it is broken in all of them. (today is 10 Aug 2011)
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Ticket URL: <https://code.djangoproject.com/ticket/16609>
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