#28872: JSONField __in operator breaks when given a values_list()
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Reporter: Jerome Leclanche | Owner: (none)
Type: Bug | Status: new
Component: contrib.postgres | Version: 1.11
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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Prerequisites
1. Create a model MyModel1 with the field `resource = JSONField()`.
2. Create another model MyModel2 with a field `id =
CharField(max_length=255)`
Reproduce by doing
MyModel1.objects.filter(resource__foo__id__in=MyModel2.objects.all().values_list("id"))
Expected result: Should look at MyModel1 for objects with `resource`
matching `{"foo": {"id": <id>}}`.
Actual result:
ERROR: operator does not exist: jsonb = character varying
LINE 1: ...AND ("resource" #> '{foo,id}') IN (SELECT...
The actual issue is that when passing a values_list() to __in, the values
list is not cast to jsonb (unlike when passing a text type). In the
resulting sql, we can see `IN (SELECT U0."id" AS Col1 FROM mymodel2 U0
...)`. Wrapping `to_json(U0."id")` solves the issue.
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Ticket URL: <https://code.djangoproject.com/ticket/28872>
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