#29731: Type conversion should be possible with OuterRef
-------------------------------------+-------------------------------------
Reporter: tienne-B | Owner: nobody
Type: Bug | Status: new
Component: Database | Version: 2.1
layer (models, ORM) | Keywords: postgresql, sql,
Severity: Normal | json, outerref
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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With the query:
{{{
subquery = SentMessageRecord.objects.filter(tournament=self.tournament,
email=OuterRef('email'), context__key=OuterRef('url_key'),
event=SentMessageRecord.EVENT_TYPE_URL)
people = self.tournament.participants.filter(url_key__isnull=False,
email__isnull=False).exclude(email__exact="").annotate(already_sent=Exists(subquery)).filter(already_sent=already_sent)
}}}
where `url_key` is a `CharField` and `context` is a `JsonField` (using
Postgres), the `__key` is a string that corresponds to `url_key`. However,
I get the error:
{{{
django.db.utils.ProgrammingError: operator does not exist: jsonb =
character varying
LINE 1: ...tmessagerecord" U0 WHERE ((U0."context" -> 'key') = ("partic...
^
HINT: No operator matches the given name and argument type(s). You might
need to add explicit type casts.
}}}
Wrapping the `OuterRef` with `str()` prevents the error, but seems to be
ineffective.
--
Ticket URL: <https://code.djangoproject.com/ticket/29731>
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