Convert column name to string only once

1 files changed, 2 insertions, 1 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
index 116b01814e..435bdf61e5 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
@@ -392,7 +392,8 @@ module ActiveRecord
       end
 
       def column_for(table_name, column_name) # :nodoc:
-        unless column = columns(table_name).detect { |c| c.name == column_name.to_s }
+        column_name = column_name.to_s
+        unless column = columns(table_name).detect { |c| c.name == column_name }
           raise ActiveRecordError, "No such column: #{table_name}.#{column_name}"
         end
         column