烧杯缓存抱怨TypeError

Question

烧杯缓存抱怨TypeError。我在谷歌搜索过，甚至跟踪烧杯的问题跟踪器，但找不到任何东西。

我缓存了以下方法的查询

@staticmethod
def get_queries(query):
    @cache.cache(query, type = 'file', expire = 300)
    def load(query):
        entries = db.get_expensive_query(query)
        return entries
    return load(query)

.

然而，当我运行该程序时，这就是我收到的;

  File "/Users/ivan/project/controller/caching.py", line 15, in get_queries
      return load(query)
  File "/Library/Python/2.6/site-packages/Beaker-1.5.4-py2.6.egg/beaker/cache.py", line 417, in cached
    return cache[0].get_value(cache_key, createfunc=go)
  File "/Library/Python/2.6/site-packages/Beaker-1.5.4-py2.6.egg/beaker/cache.py", line 214, in get
    return self._get_value(key, **kw).get_value()
  File "/Library/Python/2.6/site-packages/Beaker-1.5.4-py2.6.egg/beaker/container.py", line 256, in get_value
    if not self._is_expired(stored, expired):
  File "/Library/Python/2.6/site-packages/Beaker-1.5.4-py2.6.egg/beaker/container.py", line 245, in _is_expired
    time.time() >= expiretime + storedtime
TypeError: cannot concatenate 'str' and 'float' objects

.

我做错了什么，或者这是一个烧杯的错误吗？

Answer 1

Your code calls cache.cache with an integer for expire, which is correct, but clearly either expiretime or storedtime is winding up with a string. [From the error message it has to be expiretime. --ed] So here's what I think happened:

(1) You called cache.cache with a string expire at some point. [Maybe even from the default cache.expire in the CacheManager opts, not sure.]

(2) You fixed the bug, producing the code you submitted (which works for me).

(3) You reran the code without deleting the cache directory, and so somehow it picked up the previous state.

I can reproduce your error by following the above prescription. Could you delete your cache (everything in cache.data_dir and cache.lock_dir) and try again?