我先执行了rails new myapp rails generate scafflod ticket name:string rake db:migrate 这是执行rails server可以正常访问并创建对象。 现在我想增加 ticket 的项目，执行rails generate migration AddEmailToTickets email:string rake db:migrate 修改 view 目录下的访问文件，在访问时，却出现了一下的错误：

ActiveModel::MassAssignmentSecurity::Error in TicketsController#create

Can't mass-assign protected attributes: email Rails.root: /home/lo/try/rails/ff

Application Trace | Framework Trace | Full Trace app/controllers/tickets_controller.rb:43:in `new' app/controllers/tickets_controller.rb:43:in `create' Request

Parameters:

{"utf8"=>"✓", "authenticity_token"=>"xFsJUy4zWJbLU3jxOaimoJHc8D0e8pR2N88RS5DEo1E=", "ticket"=>{"name"=>"asf", "address"=>"af", "price"=>"2323", "email"=>"wqer"}, "commit"=>"Create Ticket"} Show session dump

Show env dump

Response

Headers:

总是无法访问，不知是不是数据迁移没有成功还是怎么的，求解？