issue with many to many field

[jul]

hi,

I tried to filter a resultset by a many to many field and failed. Can
it be done? What I tried is shown below. What's wrong?
Thank you
jul

To show that a Restaurant instance named "bella napoli" exists, and
that it has two categories:

In [41]: Restaurant.objects.get(name="bella napoli").category.all()
Out[41]: [<Category: french>, <Category: italian>]

The following works:

In [50]: Restaurant.indexer.search('bella').filter(name="bella napoli")
[0].instance
Out[50]: <Restaurant: bella napoli>

But this does not:

In [54]: category=Category.objects.get(name="italian")
In [55]: Restaurant.indexer.search('chez').filter(category=category)
[0].instance
---------------------------------------------------------------------------
(...)
IndexError: list index out of range

[Alex Koshelev]

Hi, jul!

It is hard to answer to your question without indexer definition is present but I'll try.

First of all only fields defined as tags can be filtered. M2M fields are indexed by its objects __unicode__ values joined with commas. So if you want to search against this fields you have to use `__contains` lookup and unicode value of specific object. For you case:

Restaurant.indexer.search('chez').filter(category__contains=unicode(category))

Hope this helps.
---
Alex Koshelev

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