Ian Bicking wrote: > Sometime a while ago someone asked about an option to have the schema > fill in values that are missing. I can't remember who. Anyway, it took > a while, but now it's there in r1218 as an option on Schemas: > > # If this is given, then any keys that aren't available but > # are expected will be replaced with this value (and then > # validated!) This does not override a present .if_missing > # attribute on validators: > if_key_missing = NoDefault
This change doesn't fit my usage scenario. What I have is like this : a=dict(a set of keyword string values from web page) s_a = schema(build from SQLObject data validators) s_b = schema(a subset of fields in a, that is not in s_a) I want to validate: o = s_a.to_python(a) o = s_b.to_python(o) That is, fill in o in sequence. The problem is, s_a may contains fields not in a and I just want it to be skipped as a can be just a subset of s_a fields. The current if_key_missing still force me to fill in something for keys that I have no interest in this sequence or that it may be specified in s_b.
