It is better to only allow where on known attributes by default. There should an optional parameter to search on unknown attributes.
Person.where :name => "x"
#will fail if name is not a known attribute (DSL declared)
Person.where :name => "x"
#will work just fine if :name has been declared
Person.where :name => "x", :only_known => False
#will not fail if name has not been declared.
It is better to only allow
whereon known attributes by default. There should an optional parameter to search on unknown attributes.