Input filtering and Form validation

Form validation inside a model is not acceptable for me. You don't send requests to models to validate them, this is a joke I hope.

If your view of a model is that it is the central place that handles all business logic for the data, then validating within the model is perfectly fitting the MVC pattern. Typically, though, we seem to treat our Models as the Data Access layer which can be completely separate from the Model itself.

So, really, it's all terminology

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