Date field

[orsinium]

Close #513

[orsinium]

@erdenezul, can you review my PR?

[erdenezul]

Sure

[erdenezul]

@orsinium can you add changelog about it. otherwise it looks good to me.

[orsinium]

Thank you. Added changelog. Can you merge PR now?

[th3happybit]

Datefield does not support null value, @orsinium can you fix it, please 🙏

[bagerard]

@th3happybit It seems ok, see below

class JediX(Document):
    dob = DateField()

jedix = JediX(dob=datetime.now()).save()
print(jedix.dob)    # datetime.date(2020, 6, 20)

jedix.dob = None
jedix.save()

jedix = JediX.objects.first()    # fetch the object again
print(jedix.dob is None)	# True

Please open an issue with a reproducible code that demonstrates your problem instead of posting this in an old PR