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Cache invalidation mechanism


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Hi there


I'm checking how the caching mechanism works in Prestashop ( So far I understand that it's based on the SQL queries: the query feeds a md5 function that is used as a key in the cache. There is also a delete function that removes entries from the cache. So far so good.


However, I don't see any mechanism (in the models, controllers, anywhere) that removes entries from the cache. For instance, once a product is updated, the cache entry related to it must be expired, or the data will be out of sync. I see the class Db and some modules using delete, but I would expect a much more comprehensive cache invalidation mechanism.


Am I missing anything? Could anyone please explain how the cache invalidation mechanism work?


Thank you


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