use statement cache for belongs_to relations

2 files changed, 13 insertions, 2 deletions

diff --git a/activerecord/lib/active_record/associations/collection_association.rb b/activerecord/lib/active_record/associations/collection_association.rb
index b623f1375d..3a0a5165b6 100644
--- a/activerecord/lib/active_record/associations/collection_association.rb
+++ b/activerecord/lib/active_record/associations/collection_association.rb
@@ -416,7 +416,7 @@ module ActiveRecord
         return scope.to_a if reflection.scope_chain.any?(&:any?)
 
         conn = klass.connection
-        sc = reflection.association_scope_cache(conn) do
+        sc = reflection.association_scope_cache(conn, owner) do
           StatementCache.create(conn) { |params|
             as = AssociationScope.create { params.bind }
             target_scope.merge as.scope(self, conn)
diff --git a/activerecord/lib/active_record/associations/singular_association.rb b/activerecord/lib/active_record/associations/singular_association.rb
index ba28e91633..f2e3a4e40f 100644
--- a/activerecord/lib/active_record/associations/singular_association.rb
+++ b/activerecord/lib/active_record/associations/singular_association.rb
@@ -39,7 +39,18 @@ module ActiveRecord
         end
 
         def get_records
-          scope.limit(1).to_a
+          return scope.limit(1).to_a if reflection.scope_chain.any?(&:any?)
+
+          conn = klass.connection
+          sc = reflection.association_scope_cache(conn, owner) do
+            StatementCache.create(conn) { |params|
+              as = AssociationScope.create { params.bind }
+              target_scope.merge(as.scope(self, conn)).limit(1)
+            }
+          end
+
+          binds = AssociationScope.get_bind_values(owner, reflection.chain)
+          sc.execute binds, klass, klass.connection
         end
 
         def find_target