Use new SelectManager#projections= method

3 files changed, 4 insertions, 4 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb
index bfbf953a37..dc4a53034b 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb
@@ -310,8 +310,8 @@ module ActiveRecord
       # on mysql (even when aliasing the tables), but mysql allows using JOIN directly in
       # an UPDATE statement, so in the mysql adapters we redefine this to do that.
       def join_to_update(update, select) #:nodoc:
-        subselect = select.ast.clone
-        subselect.cores.last.projections = [update.key]
+        subselect = select.clone
+        subselect.projections = [update.key]
 
         update.where update.key.in(subselect)
       end
diff --git a/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb b/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb
index 379ba162ed..cba00dc625 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb
@@ -585,7 +585,7 @@ module ActiveRecord
       def join_to_update(update, select) #:nodoc:
         if select.limit || select.offset || select.orders.any?
           subsubselect = select.clone
-          subsubselect.ast.cores.last.projections = [update.key]
+          subsubselect.projections = [update.key]
 
           subselect = Arel::SelectManager.new(select.engine)
           subselect.project Arel.sql(update.key.name)
diff --git a/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
index a33e2d8cb0..c3a066a622 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
@@ -499,7 +499,7 @@ module ActiveRecord
       def join_to_update(update, select) #:nodoc:
         if select.limit || select.offset || select.orders.any?
           subsubselect = select.clone
-          subsubselect.ast.cores.last.projections = [update.key]
+          subsubselect.projections = [update.key]
 
           subselect = Arel::SelectManager.new(select.engine)
           subselect.project Arel.sql(update.key.name)