Rails-更新单个属性：使用自定义操作链接还是使用隐藏字段链接表单？ [英] Rails - Update a single attribute : link with custom action or form with hidden fields?

问题描述

假设我有一个用户模型，其中的facebook_uid字段与该用户的Facebook ID相对应。

Let's say I have a User model, with a facebook_uid field corresponding to the user's facebook id.

我要允许用户取消其Facebook帐户的链接。这样做，我需要将此属性设置为nil。

I want to allow the user to unlink his facebook account. Do do so, I need to set this attribute to nil.

我目前看到这样做的两种方式

I currently see 2 ways of doing this

# app/controllers/users_controller.rb
def unlink_facebook_account
  @user = User.find params[:id]
  # Authorization checks go here
  @user.facebook_uid = nil
  @user.save
  # Redirection go here
end

# config/routes.rb
ressources :users do
  get 'unlink_fb', :on => :member, :as => unlink_fb
end 

# in a view
= link_to "Unlink your facebook account", unlink_fb_path(@user)

第二种方式：为现有更新操作创建表单

Second way : create a form to the existing update action

# app/views/user/_unlink_fb_form.html.haml
= form_for @user, :method => "post" do |f|
  = f.hidden_field :facebook_uid, :value => nil
  = f.submit "Unlink Facebook account"

我不是超级粉丝无论哪种方式。

I'm not a big fan of either way.

• 在第一个中，我必须为更新控制器已经可以执行的操作添加新操作。

• In the first one, I have to add a new action for something that the update controller already can do.

在第二个示例中，如果不自定义更新操作，则无法将facebook_uid设置为nil，并且如果不添加一些JavaScript，就不能拥有链接而不是按钮。 p>

In the second one, I cannot set the facebook_uid to nil without customizing the update action, and I cannot have a link instead of a button without adding some javascript.

不过，对于这种情况，您会推荐什么是最好，最优雅的解决方案？我是否错过了第三种选择？

Still, what would you recommend as the best and most elegant solution for this context? Did I miss a third alternative?

使用更新链接动作，以要更新的属性为参数；处理属性设置为0的情况

Use a link to the update action, with the attribute to update as parameters ; and handle the case when the attribute is set to 0

= link_to "Unlink your facebook account", 
          user_path(@user, 
                    :user => { :facebook_uid => 0}),
          :method => :put, 
          :confirm => "Are you sure?"

推荐答案

不确定您的路线是什么样，但是如果有一个更新操作，它应与link_to一起使用。如果您使用链接，请确保使用PUT或POST的方法（最好是PUT，因为它是更新）：

Not sure what your routes look like but if you have an update action it should work with the link_to. If you go with the link make sure you use a method of PUT or POST (ideally PUT because it's an update):

link_to("Unlink your facebook account", user_path(@user, :facebook_uid => nil), :method => :put, :confirm => "Are you sure?")

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