Ian Bicking: the old part of his blog

Re: Descriptors and parallel triggers

To a degree its easier here, because SQLObject already centralizes a lot of these operations -- so the descriptors are actually thin delegates back to fixed SQLObject methods. The triggers and events would then also be centrally managed, and would actually be registered during __addtoclass__. There's still some complexity to multiple triggers being fired (and then what order they get fired in, especially when one invalidates the other)... but I'll have to wait to figure that out when the infrastructure is in place to add that complexity ;)
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by Ian Bicking