Allow use of null values in enums on active record 5 #833
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Currently, if you have enum with null values, it fails the validation on CanCanCan because it casts the values received on the condition to strings, but the values that comes from the subject are not casted. This PR tries to manage that case, because nil in ruby is casted to the empty string, so if you have a condition like
can action, model, enum_attribute: [null, :value]
, on the accessible_by it works correctly for rows with null value, but when doing thecan?
on a specific record, it fails if it has null value.