1 files changed, 12 insertions, 11 deletions
diff --git a/activerecord/lib/active_record/relation/predicate_builder/array_handler.rb b/activerecord/lib/active_record/relation/predicate_builder/array_handler.rb
index b8d9240bf8..95dbd6a77f 100644
--- a/activerecord/lib/active_record/relation/predicate_builder/array_handler.rb
+++ b/activerecord/lib/active_record/relation/predicate_builder/array_handler.rb
@@ -1,17 +1,14 @@
 module ActiveRecord
   class PredicateBuilder
     class ArrayHandler # :nodoc:
+      def initialize(predicate_builder)
+        @predicate_builder = predicate_builder
+      end
+
       def call(attribute, value)
         values = value.map { |x| x.is_a?(Base) ? x.id : x }
         nils, values = values.partition(&:nil?)
 
-        if values.any? { |val| val.is_a?(Array) }
-          ActiveSupport::Deprecation.warn "Passing a nested array to Active Record " \
-            "finder methods is deprecated and will be removed. Flatten your array " \
-            "before using it for 'IN' conditions."
-          values = values.flatten
-        end
-
         return attribute.in([]) if values.empty? && nils.empty?
 
         ranges, values = values.partition { |v| v.is_a?(Range) }
@@ -19,20 +16,24 @@ module ActiveRecord
         values_predicate =
           case values.length
           when 0 then NullPredicate
-          when 1 then attribute.eq(values.first)
+          when 1 then predicate_builder.build(attribute, values.first)
           else attribute.in(values)
           end
 
         unless nils.empty?
-          values_predicate = values_predicate.or(attribute.eq(nil))
+          values_predicate = values_predicate.or(predicate_builder.build(attribute, nil))
         end
 
-        array_predicates = ranges.map { |range| attribute.in(range) }
+        array_predicates = ranges.map { |range| predicate_builder.build(attribute, range) }
         array_predicates.unshift(values_predicate)
         array_predicates.inject { |composite, predicate| composite.or(predicate) }
       end
 
-      module NullPredicate
+      protected
+
+      attr_reader :predicate_builder
+
+      module NullPredicate # :nodoc:
         def self.or(other)
           other
         end