[Zope] Invalidating object(s) in the Zope RAM Cache

[Peter Sabaini]

Elfyn McBratney wrote:
> Dieter Maurer wrote:
> 
> 
>>Elfyn McBratney wrote at 2003-12-10 16:50 -0000:
>>
>>
>>>...
>>>So, the question is:  Is there a way that I can invalidate an object
>>>from the Zope RAM cache using the Zope API?
>>
>>Sure: you can do it from the ZMI (Ram Cache Manager --> "Statistics" -->
>>cache entry --> "Invalidate").
>>Thus, you can do it via the API (as the ZMI does precisely that). Look how
>>the ZMI does it.
> 
> 
> Sorry, my post was lacking in detail.
> 
> I have been doing it via the ZMI but it's a bit tedious to have to do that
> everytime an article is posted.  =)  I'll hunt for the source...  *should
> have done that in the first place*  :-)
> 

self.ZCacheable_invalidate()

clears the whole cache provided self is an object subclassed from 
Cache.Cacheable

If you want to clear a single cache entry its a little more complicated. 
I do it with:

c = self.ZCacheable_getCache()
if c is not None:
     keywords = { ... my cache keys ...}
     try:
         oc = c.getObjectCacheEntries(self)
         index = oc.aggregateIndex(view_name, None,
                                   c.request_vars, keywords)
         oc.delEntry(index)
     except AttributeError: ... do something ....


  - peter.


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