Refactor AssociationCollection#include? with objects in memory

Signed-off-by: NJosé Valim <jose.valim@gmail.com>

activerecord/lib/active_record/associations/association_collection.rb

@@ -558,11 +558,10 @@ def fetch_first_or_last_using_find?(args)
 
         def include_in_memory?(record)
           if @reflection.is_a?(ActiveRecord::Reflection::ThroughReflection)
-            @owner.send(proxy_reflection.through_reflection.name.to_sym).map do |source|
-              source_reflection_target = source.send(proxy_reflection.source_reflection.name)
-              return true if source_reflection_target.respond_to?(:include?) ? source_reflection_target.include?(record) : source_reflection_target == record
+            @owner.send(proxy_reflection.through_reflection.name.to_sym).any? do |source|
+              target = source.send(proxy_reflection.source_reflection.name)
+              target.respond_to?(:include?) ? target.include?(record) : target == record
             end
-            false
           else
             @target.include?(record)
           end