Source code for horizon.utils.lazy_encoder

# Copyright 2016 Red Hat, Inc.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

from django.core.serializers.json import DjangoJSONEncoder
from django.utils.encoding import force_text
from django.utils.functional import Promise


class LazyTranslationEncoder(DjangoJSONEncoder):
    """JSON encoder that resolves lazy objects like translations"""
    def default(self, obj):
        if isinstance(obj, Promise):
            return force_text(obj)
        return super(LazyTranslationEncoder, self).default(obj)