3 files changed, 20 insertions, 2 deletions
diff --git a/activerecord/lib/active_record/relation/predicate_builder.rb b/activerecord/lib/active_record/relation/predicate_builder.rb
index 330ec08535..537ebbef28 100644
--- a/activerecord/lib/active_record/relation/predicate_builder.rb
+++ b/activerecord/lib/active_record/relation/predicate_builder.rb
@@ -66,7 +66,7 @@ module ActiveRecord
     private
       def self.build(attribute, value)
         case value
-        when Array, ActiveRecord::Associations::CollectionProxy
+        when Array
           values = value.to_a.map {|x| x.is_a?(Base) ? x.id : x}
           ranges, values = values.partition {|v| v.is_a?(Range)}
 
diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb
index 46c0d6206f..42849d6bc9 100644
--- a/activerecord/lib/active_record/relation/query_methods.rb
+++ b/activerecord/lib/active_record/relation/query_methods.rb
@@ -764,6 +764,11 @@ module ActiveRecord
         [@klass.send(:sanitize_sql, other.empty? ? opts : ([opts] + other))]
       when Hash
         attributes = @klass.send(:expand_hash_conditions_for_aggregates, opts)
+
+        attributes.values.grep(ActiveRecord::Relation) do |rel|
+          self.bind_values += rel.bind_values
+        end
+
         PredicateBuilder.build_from_hash(klass, attributes, table)
       else
         [opts]
diff --git a/activerecord/test/cases/relation/where_test.rb b/activerecord/test/cases/relation/where_test.rb
index f69a248491..c43c7601a2 100644
--- a/activerecord/test/cases/relation/where_test.rb
+++ b/activerecord/test/cases/relation/where_test.rb
@@ -8,7 +8,20 @@ require 'models/edge'
 
 module ActiveRecord
   class WhereTest < ActiveRecord::TestCase
-    fixtures :posts, :edges
+    fixtures :posts, :edges, :authors
+
+    def test_where_copies_bind_params
+      author = authors(:david)
+      posts  = author.posts.where('posts.id != 1')
+      joined = Post.where(id: posts)
+
+      assert_operator joined.length, :>, 0
+
+      joined.each { |post|
+        assert_equal author, post.author
+        assert_not_equal 1, post.id
+      }
+    end
 
     def test_belongs_to_shallow_where
       author = Author.new