Validating data from single or multiple records.

I am trying to look for a generic way to validate model data that could be
in different array structure (or shape). For example, the field to be
validated can be in the following 5 cases (and possibly more):

array['ModelName'][0]['field']
array[0]['ModelName'][field']
array['ModelName']['field']
array['ParentModelName']['ModelName']['field']
array['ParentModelName'][0]['ModelName']['field']

Is there a generic way to handle this, or I have to make a if-else condition
to go through all the possible scenarios case by case?

Thanks!
--Lapinski

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