datetime support break default function

Before version 2.0.2 we use DjangoJSONEncoder.default to handle datatime, but it doesn’t works now, and the orjson datetime is not compatible with the logic below:

https://github.com/django/django/blob/master/django/core/serializers/json.py#L81

def default(self, o):
    # See "Date Time String Format" in the ECMA-262 specification.
    if isinstance(o, datetime.datetime):
        r = o.isoformat()
        if o.microsecond:
            r = r[:23] + r[26:]
        if r.endswith('+00:00'):
            r = r[:-6] + 'Z'
        return r
    elif isinstance(o, datetime.date):
        return o.isoformat()
    elif isinstance(o, datetime.time):
        if is_aware(o):
            raise ValueError("JSON can't represent timezone-aware times.")
        r = o.isoformat()
        if o.microsecond:
            r = r[:12]
        return r
    elif isinstance(o, datetime.timedelta):
        return duration_iso_string(o)
    elif isinstance(o, (decimal.Decimal, uuid.UUID, Promise)):
        return str(o)
    else:
        return super().default(o)

Is there a way to make default works with datetime object?

[ijl]

I’ll look into overriding orjson serializing datetime objects. It also makes sense for another use case to allow serializing datetime.datetime objects without a tzinfo. I could make orjson output three digits of microseconds and match Django, but I don’t see a reason to prefer that over Python’s full precision, so it looks like you do need to avoid its handling.

[phyng]

I think it is ok now, three digits or six digits is ok. Thank you very much!

Python 3.7.0 (v3.7.0:1bf9cc5093, Jun 26 2018, 23:26:24) 
[Clang 6.0 (clang-600.0.57)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import orjson
>>> import datetime
>>> orjson.dumps(datetime.datetime.now())
b'"2019-04-03T08:00:28.473661"'