mirror of
https://github.com/encode/django-rest-framework.git
synced 2024-11-23 01:57:00 +03:00
69 lines
2.5 KiB
Python
69 lines
2.5 KiB
Python
"""
|
|
Helper classes for parsers.
|
|
"""
|
|
from __future__ import absolute_import, unicode_literals
|
|
|
|
import datetime
|
|
import decimal
|
|
import json # noqa
|
|
import uuid
|
|
|
|
from django.db.models.query import QuerySet
|
|
from django.utils import six, timezone
|
|
from django.utils.encoding import force_text
|
|
from django.utils.functional import Promise
|
|
|
|
from rest_framework.compat import coreapi, total_seconds
|
|
|
|
|
|
class JSONEncoder(json.JSONEncoder):
|
|
"""
|
|
JSONEncoder subclass that knows how to encode date/time/timedelta,
|
|
decimal types, generators and other basic python objects.
|
|
"""
|
|
def default(self, obj):
|
|
# For Date Time string spec, see ECMA 262
|
|
# http://ecma-international.org/ecma-262/5.1/#sec-15.9.1.15
|
|
if isinstance(obj, Promise):
|
|
return force_text(obj)
|
|
elif isinstance(obj, datetime.datetime):
|
|
representation = obj.isoformat()
|
|
if representation.endswith('+00:00'):
|
|
representation = representation[:-6] + 'Z'
|
|
return representation
|
|
elif isinstance(obj, datetime.date):
|
|
return obj.isoformat()
|
|
elif isinstance(obj, datetime.time):
|
|
if timezone and timezone.is_aware(obj):
|
|
raise ValueError("JSON can't represent timezone-aware times.")
|
|
representation = obj.isoformat()
|
|
return representation
|
|
elif isinstance(obj, datetime.timedelta):
|
|
return six.text_type(total_seconds(obj))
|
|
elif isinstance(obj, decimal.Decimal):
|
|
# Serializers will coerce decimals to strings by default.
|
|
return float(obj)
|
|
elif isinstance(obj, uuid.UUID):
|
|
return six.text_type(obj)
|
|
elif isinstance(obj, QuerySet):
|
|
return tuple(obj)
|
|
elif isinstance(obj, six.binary_type):
|
|
# Best-effort for binary blobs. See #4187.
|
|
return obj.decode('utf-8')
|
|
elif hasattr(obj, 'tolist'):
|
|
# Numpy arrays and array scalars.
|
|
return obj.tolist()
|
|
elif (coreapi is not None) and isinstance(obj, (coreapi.Document, coreapi.Error)):
|
|
raise RuntimeError(
|
|
'Cannot return a coreapi object from a JSON view. '
|
|
'You should be using a schema renderer instead for this view.'
|
|
)
|
|
elif hasattr(obj, '__getitem__'):
|
|
try:
|
|
return dict(obj)
|
|
except:
|
|
pass
|
|
elif hasattr(obj, '__iter__'):
|
|
return tuple(item for item in obj)
|
|
return super(JSONEncoder, self).default(obj)
|