TodoConroller #add中的NameError

Question

应用/控制器/ todos_controller.rb

def add
   todo = Todo.create(:todo_item => params[:todo_text])
   if !todo.valid?
        flash[:error] = todo.errors.full_messages.join("<br>").html_safe
   end
   redirect_to :action => 'index'
end

错误消息：

  

TodosController中的NameError #add undefined局部变量或方法   'todo'代表＃

如何解决这些问题？

Answer 1

试试这个：

def add
  todo = Todo.create(:todo_item => params[:todo_text])
  if todo && !todo.valid? 
    flash[:error] = todo.errors.full_messages.join("").html_safe 
  end 
  redirect_to :action => 'index'
end