迁移文件出错

db/migrate/20150722015428_add_errormsg_to_studen_work_test.rb

@@ -4,6 +4,6 @@ class AddErrormsgToStudenWorkTest < ActiveRecord::Migration
   end
 
   def down
-    remove_column :student_work_tests,:error_msg,
+    remove_column :student_work_tests,:error_msg
   end
 end