Delegate `ast` and `locked` to `arel` explicitly

Currently `ast` and `locked` are used in the internal but delegating to
`arel` is depend on `method_missing`. If a model class is defined these
methods, `select_all` will be broken.

It should be delegated to `arel` explicitly.

2 files changed, 3 insertions, 0 deletions

diff --git a/activerecord/lib/active_record/relation.rb b/activerecord/lib/active_record/relation.rb
index 5775eda5a5..b61ac84155 100644
--- a/activerecord/lib/active_record/relation.rb
+++ b/activerecord/lib/active_record/relation.rb
@@ -18,6 +18,7 @@ module ActiveRecord
     attr_reader :table, :klass, :loaded, :predicate_builder
     alias :model :klass
     alias :loaded? :loaded
+    alias :locked? :locked
 
     def initialize(klass, table, predicate_builder, values = {})
       @klass  = klass
diff --git a/activerecord/lib/active_record/relation/delegation.rb b/activerecord/lib/active_record/relation/delegation.rb
index 257ae04ff4..4f739a0415 100644
--- a/activerecord/lib/active_record/relation/delegation.rb
+++ b/activerecord/lib/active_record/relation/delegation.rb
@@ -46,6 +46,8 @@ module ActiveRecord
     delegate :table_name, :quoted_table_name, :primary_key, :quoted_primary_key,
              :connection, :columns_hash, to: :klass
 
+    delegate :ast, :locked, to: :arel
+
     module ClassSpecificRelation # :nodoc:
       extend ActiveSupport::Concern