This field is needed because the plain JSONField does not permit empty arrays - [] - or empty objects - {} - when the field is marked as required. Those values explicitly evaluate to a null value, and are rejected.
Instead, the IETFJSONField accepts two new arguments to control this:
- empty_values: An array of values that should evaluate to null/empty, and be rejected.
- accepted_empty_values: An array of values that should *not* evaluate to null/empty, and be accepted.
This allows the programmer to specify either a positive or negative statement of what values to accept.
Fixes issue #3331. Commit ready for merge.
- Legacy-Id: 19401
