Per-request cache in Django?

Question

I would like to implement a decorator that provides per-request caching to any method, not just views. Here is an example use case.

I have a custom ta

Answer 1

I came up with a hack for caching things straight into the request object (instead of using the standard cache, which will be tied to memcached, file, database, etc.)

# get the request object's dictionary (rather one of its methods' dictionary)
mycache = request.get_host.__dict__

# check whether we already have our value cached and return it
if mycache.get( 'c_category', False ):
    return mycache['c_category']
else:
    # get some object from the database (a category object in this case)
    c = Category.objects.get( id = cid )

    # cache the database object into a new key in the request object
    mycache['c_category'] = c

    return c

So, basically I am just storing the cached value (category object in this case) under a new key 'c_category' in the dictionary of the request. Or to be more precise, because we can't just create a key on the request object, I am adding the key to one of the methods of the request object - get_host().

Georgy.