I'm using the cacheCounter in CakePHP, which increments a counter for related fields.
Example, I have a Person table a Source table. Person.source_id maps to a row in the Source table. Each person has one Source, and each Source has none or many Person rows.
cacheCounter is working great when I change the value of a source on a person. It increments Source.Person_Count. Cool.
But when it increments, it adds it to the destination source for a person, but doesn't remove it from the old value. I tried updateCacheControl() in afterSave, but that didn't do anything.
So then I wrote some code in my model for afterSave that would subtract the source source_id, but it always did this even when I wasn't even changing the source_id. (So the count went negative).
My question: Is there a way to tell if a field was changed in the model in CakePHP?
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