python - redis编码错误怎么办?

问题描述

问 题

import redis

key = ":1:rn_data_select" + "线路"

data = cache.get(key)

if data == None:
    cursor.execute("select lat,lng,instationnum,outstationnum \
                        from %s ;" % (tablename))            
    data = cursor.fetchall()

    cache.set(key,result)

我使用以上脚本(略去不重要代码),将数据库查询结果存入redis,但是在django中读取redis中key对应结果时却出现了以下错误:(django中使用的是django-redis)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/yangtz/anaconda3/envs/keshihua/lib/python3.6/site-packages/django/core/handlers/exception.py", line 41, in inner
    response = get_response(request)
  File "/home/yangtz/anaconda3/envs/keshihua/lib/python3.6/site-packages/django/core/handlers/base.py", line 187, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/home/yangtz/anaconda3/envs/keshihua/lib/python3.6/site-packages/django/core/handlers/base.py", line 185, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/yangtz/**平台/visualplat/roadnet/views_new.py", line 240, in roadnet_maindata2
    datas = cache.get(key)
  File "/home/yangtz/anaconda3/envs/keshihua/lib/python3.6/site-packages/django_redis/cache.py", line 33, in _decorator
    return method(self, *args, **kwargs)
  File "/home/yangtz/anaconda3/envs/keshihua/lib/python3.6/site-packages/django_redis/cache.py", line 82, in get
    client=client)
  File "/home/yangtz/anaconda3/envs/keshihua/lib/python3.6/site-packages/django_redis/client/default.py", line 208, in get
    return self.decode(value)
  File "/home/yangtz/anaconda3/envs/keshihua/lib/python3.6/site-packages/django_redis/client/default.py", line 320, in decode
    value = self._serializer.loads(value)
  File "/home/yangtz/anaconda3/envs/keshihua/lib/python3.6/site-packages/django_redis/serializers/pickle.py", line 36, in loads
    return pickle.loads(force_bytes(value))
_pickle.UnpicklingError: invalid load key, '6'.

我在redis命令行看了看,脚本写入的value显示是这样的,

而使用django-redis写入的同样的结果显示这样的

这怎么办?

解决方案

看你的代码，应该是写入redis前，使用pickle模块进行序列化，把数据转成二进制了，根据github上作者的回答，除了整数，其他数据类型都序列化了，如果你不想序列化，就这样
redis_cache.get_redis_connection(alias)
具体作者回复:https://github.com/niwinz/dja...

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