Ruby on Rails：如何在form_tag中实现Cancel按钮

I have a basic form using the form_tag helper working fine, but I want to add a cancel button, what is the syntax for doing this? I want the cancel button to appear as a button, not a link, then take the user to a different URL (indicating they don't want to submit the form).

我有一个基本的表单使用form_tag帮助工作正常，但我想添加一个取消按钮，这样做的语法是什么？我希望取消按钮显示为按钮，而不是链接，然后将用户带到不同的URL（表示他们不想提交表单）。

TY, Fred

TY，弗雷德

4 个解决方案

#1

If you want to clear/reset the form fields, do what dchacke suggests.

如果要清除/重置表单字段，请执行dchacke建议的操作。

However, I'd generally expect a Cancel button to not clear the form, but to take me away from the form, meaning I don't plan on submitting it.

但是，我通常希望取消按钮不会清除表单，而是将我从表单中删除，这意味着我不打算提交表单。

If you want the latter, I'd just make a link (or button) to the page you want to go to upon cancelling, such as :

如果你想要后者，我只需要在取消时为你要去的页面建立一个链接（或按钮），例如：

=link_to 'Cancel', my_page_path

Or if you want a button:

或者如果你想要一个按钮：

= button_tag "Cancel", :type => 'button'

Then add this to your controller:

然后将其添加到您的控制器：

before_filter :check_for_cancel, :only => [:create, :update]

def check_for_cancel
  if params[:commit] == "Cancel"
    redirect_to my_page_path
  end
end

#2

If you mean a reset button, paste the following inside your form:

如果您的意思是重置按钮，请在表单中粘贴以下内容：

<%= button_tag "Reset", type: :reset %>

Tested it, it works fine and resets all fields in the form.

测试它，它工作正常并重置表单中的所有字段。

#3

Instead of a submit tag, I would suggest a <button> tag, because the parameter :commit might be localised, thus making it a pain to evaluate in the controller.

而不是提交标记，我会建议一个

A button_tag can have a name/value like any other field, so you can basically create a flag with it.

button_tag可以像任何其他字段一样具有名称/值，因此您基本上可以使用它创建一个标志。

The following code is what I would use:

我将使用以下代码：

in the view:

在视图中：

<%= button_tag t('buttons.cancel'), type: "submit", name: "cancel", value: true %>

in the controller:

在控制器中：

before_filter :redirect_cancel, only: [:create, :update]

private

def redirect_cancel
  redirect_to my_page_path if params[:cancel]
end

Much cleaner imho, because you rely on a flag instead of a (potentially) localised display value.

更清洁的imho，因为你依赖于标志而不是（可能）本地化的显示值。

#4

button_to seems a simple way to achieve the same, but it has to be put outside of the form itself, but that can easily be fixed with css.

button_to似乎是一种实现相同的简单方法，但它必须放在表单本身之外，但可以用css轻松修复。

Also, to solve this in a more generic way (also working for editing nested resources on a resource that has not been persisted yet), you can create a separate form for the cancel that contains all the original values as hidden fields.

此外，要以更通用的方式解决此问题（还用于编辑尚未保留的资源上的嵌套资源），可以为取消创建单独的表单，其中包含所有原始值作为隐藏字段。

#1