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decorators.py
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49 lines (35 loc) · 1.35 KB
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# -*- coding: utf-8 -*-
# Copyright 2017, Digital Reasoning
#
# 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 __future__ import unicode_literals
from functools import wraps
from django.contrib.contenttypes.models import ContentType
from django.core.cache import cache
def django_cache(cache_key, timeout=None):
"""
decorator to cache the result of a function in the django cache
"""
def wrapper(func):
@wraps(func)
def wrapped(self):
ctype = ContentType.objects.get_for_model(self)
final_cache_key = cache_key.format(ctype=ctype.pk, id=self.id)
cached_item = cache.get(final_cache_key)
if cached_item is None:
cached_item = func(self)
cache.set(final_cache_key, cached_item, timeout)
return cached_item
return wrapped
return wrapper