equalities

# File activerecord/lib/active_record/relation/where_clause.rb, line 101
        def equalities(predicates)
          equalities = []

          predicates.each do |node|
            case node
            when Arel::Nodes::Equality
              equalities << node
            when Arel::Nodes::And
              equalities.concat equalities(node.children)
            end
          end

          equalities
        end