#27179: Bug: error when trying to filter using regex/iregex on a key in a
django.contrib.postgres.fields.JSONField
----------------------------------+------------------
Reporter: jrhouston | Owner:
Type: Bug | Status: new
Component: contrib.postgres | Version: 1.10
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 1 | UI/UX: 0
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When trying use regex to query on a key within a postgres JSONField.
{{{
TestModel.objects.filter(field__subkey__regex=r'test')
}}}
Generates SQL which produces the following error:
{{{
LINE 1: ...WHERE "test_testmodel"."field" -> 'subkey'::text ~ 'test'
^
HINT: No operator matches the given name and argument type(s). You might
need to add explicit type casts.
}}}
This seems to be a precedence issue, and adding parenthesis before the
extracted key is cast to `::text` allows the query to run successfully.
i.e:
{{{
WHERE ("test_testmodel"."field" -> 'subkey')::text ~ 'test'
}}}
Adding the parenthesis here seems to fix the issue:
https://github.com/django/django/blob/master/django/contrib/postgres/fields/jsonb.py#L109
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Ticket URL: <https://code.djangoproject.com/ticket/27179>
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