#29108: TypeError: can only concatenate tuple (not "list") to tuple raised by
compiler.py
-------------------------------------+-------------------------------------
Reporter: Stephen | Owner: nobody
Brooks |
Type: | Status: new
Uncategorized |
Component: | Version: 2.0
Uncategorized | Keywords: TypeError list
Severity: Normal | tuple
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
-------------------------------------+-------------------------------------
Seen in django version 2.0.2
A model query triggers line 1448 in the file
django/db/models/sql/compiler.py to raise a TypeError:
`params = params + self.query.sub_params`
''TypeError exception: can only concatenate tuple (not "list") to tuple''
This line is in the `as_sql` method of the `SQLAggregateCompiler` class.
How to reproduce:
Issue a query on a model which is related to another model, and include
distinct, order_by (on a string field in the related model), a slice and a
call to count().
e.g.
`Post.objects.distinct().order_by('author__last_name')[:20].count()`
The presence of `distinct()` above, you could argue, is not needed,
however, the above represents a simplification of the more complex query
with which I originally saw the problem, and there the `distinct()`
followed a more complex cross-table filter.
--
Ticket URL: <https://code.djangoproject.com/ticket/29108>
Django <https://code.djangoproject.com/>
The Web framework for perfectionists with deadlines.
--
You received this message because you are subscribed to the Google Groups
"Django updates" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
To view this discussion on the web visit
https://groups.google.com/d/msgid/django-updates/050.2fed91199216377709b3557099865a29%40djangoproject.com.
For more options, visit https://groups.google.com/d/optout.
