taiga-back/taiga/base/api/utils/encoders.py

82 lines
2.8 KiB
Python

# Copyright (C) 2014-2015 Andrey Antukh <niwi@niwi.be>
# Copyright (C) 2014-2015 Jesús Espino <jespinog@gmail.com>
# Copyright (C) 2014-2015 David Barragán <bameda@dbarragan.com>
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# This code is partially taken from django-rest-framework:
# Copyright (c) 2011-2014, Tom Christie
"""
Helper classes for parsers.
"""
from django.db.models.query import QuerySet
from django.utils.datastructures import SortedDict
from django.utils.functional import Promise
from django.utils import timezone
from django.utils.encoding import force_text
from taiga.base.api.serializers import DictWithMetadata, SortedDictWithMetadata
import datetime
import decimal
import types
import json
class JSONEncoder(json.JSONEncoder):
"""
JSONEncoder subclass that knows how to encode date/time/timedelta,
decimal types, and generators.
"""
def default(self, o):
# For Date Time string spec, see ECMA 262
# http://ecma-international.org/ecma-262/5.1/#sec-15.9.1.15
if isinstance(o, Promise):
return force_text(o)
elif 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 timezone and timezone.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 str(o.total_seconds())
elif isinstance(o, decimal.Decimal):
return str(o)
elif isinstance(o, QuerySet):
return list(o)
elif hasattr(o, "tolist"):
return o.tolist()
elif hasattr(o, "__getitem__"):
try:
return dict(o)
except:
pass
elif hasattr(o, "__iter__"):
return [i for i in o]
return super(JSONEncoder, self).default(o)
SafeDumper = None