#13710: raw() sql bug when using joins
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Reporter: Renskers | Owner: nobody
Status: new | Milestone:
Component: Database layer (models, ORM) | Version: 1.2
Keywords: raw sql joins | Stage: Unreviewed
Has_patch: 0 |
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I love the new raw() function to write custom sql and get back ORM
objects. However, when using joins, things get weird.
As long as you use "select *", everything works fine:
{{{
for r in Model.objects.raw('SELECT * FROM model INNER JOIN othermodel ON
othermodel.model_id = model.id'):
print r
}}}
However, this can result in a LOT of columns that you don't need, and
possible duplicate column names.
Solution would seem to be this:
{{{
for r in Model.objects.raw('SELECT model.id, model.name FROM model INNER
JOIN othermodel ON othermodel.model_id = model.id'):
print r
}}}
Sadly, this doesn't work. I get an "type() argument 1 must be string, not
unicode" error from django/db/models/query_utils.py in
deferred_class_factory, line 274.
Weirdly enough, this does work:
{{{
for r in Model.objects.raw('SELECT model.* FROM model INNER JOIN
othermodel ON othermodel.model_id = model.id'):
print r
}}}
--
Ticket URL: <http://code.djangoproject.com/ticket/13710>
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