JSONField cannot be overridden to use OrderedDict as python-representation of objects of JSON

[Vladimir Chub]

I tried to override django.contrib.postgres.fields.JSONField to use OrderedDict instead of dict when field value is representing as Python-object. According to the source code, it was necessary override django.contrib.postgres.fields.jsonb.JSONField and its formfield form django.contrib.postgres.forms.jsonb.JSONField. I changed json.loads(value) to json.loads(value, object_pairs_hook=OrderedDict) in multiple places but it has no effect. Having dealt with the source code, I came to the conclusion that there is no possibility (or too complexity, so I don't know how) to override this behavior of JSONField.
Please, implement the feature which will allow override JSONField's python-representation

[Dark Goat]

I think there is a common way to resolve this, the code down below should work.

your_filed = JSONField(default=collections.OrderedDict)

[Tim Graham]

Django's JSONField uses the jsonb data type. According to ​PostgreSQL's documentation, jsonb "does not preserve the order of object keys" so I don't think this is possible. Perhaps there are other custom fields that use the PostgreSQL's json datatype (which does preserve ordering) that will work for your use case.

[Vladimir Chub]

Perhaps there are other custom fields that use the PostgreSQL's json datatype (which does preserve ordering) that will work for your use case.

Of course there is a json field in PostgreSQl supporting ordering ​https://www.postgresql.org/docs/9.6/static/datatype-json.html

Because the json type stores an exact copy of the input text, it will preserve semantically-insignificant white space between tokens, as well as the order of keys within JSON objects

Django is now using jsonrb as JSONField, but also something like OrderedJSONField mapped with PostgreSQL json field can be implemented. Are there any chances of if?

[Tim Graham]

I'm not sure. You could try to implement it and then write to the DevelopersMailingList with the proposal.