Disjunction in ActiveRecord

Question

Is it possible to use ActiveRecord named_scopes to create one query with sql OR clauses?

When I use

Model.scope1.scope2

generated query is conjunction of these scopes.

Answer 1

This isn't really what named scopes were designed to do, but you could probably use them with some additional code to get what you needed.

def combine_scopes(model)
  (model.scope1 + model.scope2).uniq
end

or allow any scopes to be combined

def combine_scopes(model, scope1, scope2)
  (model.send(scope1) + model.send(scope2)).uniq
end

you could even change that to allow any number of scopes using *args