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I'm currently working on teaching myself Zope 3/Five by converting one of my products to as many new technologies as I can put in. I'm coming against one issue that must be a pretty common pattern, at least for Zope 2/Five applications, which I haven't been able to solve:


I have a schema field where I want to validate the value based on information stored on the container where the object with the schema in question is stored (or will be stored, in the case of a formlib addview). I can see that fields are not context-aware by default, but they do have a method "bind" to generate a clone that does have access to the current context. However, the programmer has to pass a context (any context, really) to this method himself, but when the validation/constraints are called up there is no context.

How do others handle this situation?

jens

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