#26391: JSONField empty_values
-------------------------------------+-------------------------------------
Reporter: sim1234 | Owner: (none)
Type: | Status: closed
Cleanup/optimization |
Component: contrib.postgres | Version: 1.9
Severity: Normal | Resolution: needsinfo
Keywords: JSON JSONField | Triage Stage:
postgres forms | Unreviewed
Has patch: 1 | Needs documentation: 0
Needs tests: 1 | Patch needs improvement: 1
Easy pickings: 0 | UI/UX: 0
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Comment (by Matt Hegarty):
Can we re-open this as a bug? The default behaviour of JSONFields in the
admin console is to fail when you try to save (see attached).
Also raised on [https://stackoverflow.com/a/56271722/39296 SO]
The workaround is:
{{{
# forms.py
class ValidEmptyJSONField(forms.JSONField):
empty_values = [None, "", [], ()]
from django.db.models import JSONField
class ValidEmptyJSONField(JSONField):
"""
Overridden to permit valid empty JSON.
"""
empty_values = [None, "", [], ()]
def formfield(self, **kwargs):
from app import forms
return super().formfield(**{"form_class":
forms.ValidEmptyJSONField, **kwargs})
}}}
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Ticket URL: <https://code.djangoproject.com/ticket/26391#comment:4>
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