Add DurationField

[ticosax]

Field that map to django.db.models.fields.DurationField for Django>=1.8 otherwise
with django.db.models.fields.BigIntegerField

[tomchristie]

Refs #2481.

[tomchristie]

The documentation for this needs to go into what the input/output representation is.
Also what internal value is used (a timedelta, right?)

[ticosax]

Yes it is a timedelta.
I will update the documentation

[ticosax]

@tomchristie I tried to find a better place for the documentation but I couldn't find it.
Please, Can you explain in details what you expect ?

[tomchristie]

I would simply mention that the validated_data for these fields will contain a timedelta, and that the field is only available with Django versions >= 1.8

[ticosax]

I realized something is missing for Backward compatibility. I need to transform the timedelta instance into microseconds in DurationField(BingIntegerField) .
please hold the merge

[ticosax]

I pushed a new version converting timedeltainto microseconds for rest_framework.compat.DurationField.

[xordoquy]

@tomchristie - given the backported wall of code -for DurationField- wouldn't it be simpler if we don't provide the DurationField if Django < 1.8 ?
I'm thinking about how would we reflect the Django's core changes to this code ?

[tomchristie]

wouldn't it be simpler if we don't provide the DurationField if Django < 1.8

Sounds reasonable.

[ticosax]

ok, I'll remove backport of DurationField

[xordoquy]

@ticosax thanks a lot and sorry for the extra work.

[tomchristie]

Missing a full stop at the end of this sentence. (Just after the final backtick)

[ticosax]

I removed the backport of DurationField.
It will now raise NotImplementedError if someone tries to use DurationField with django < 1.8

[tomchristie]

Looks really nice now!

[tomchristie]

@xordoquy I'm happy with this whenever you are.

[xordoquy]

Brillant. Thanks a lot @ticosax !!

[ticosax]

That was fast ! thank you also.
hoping for the new release now