使用 link_to 切换布尔值 [英] Toggling a boolean with link_to

问题描述

我已经阅读了相关的堆栈问题，但似乎仍然使用以下代码遇到路由错误:

I've read through the relevant Stack questions but still seem to be hitting a routing error with the following code:

resources :memberships do
  put :toggleon
  put :toggleoff
end

Memberships_controller.rb

 def toggleon
    @membership = Membership.find(params[:id])
    @membership.update_attributes(:active => true)
    if user.id == membership_id 
       redirect_to root_path
    else
       redirect_to group
    end
 end

 def toggleoff
    @membership = Membership.find(params[:id])
    @membership.update_attributes(:active => false)
          if user.id == membership_id 
       redirect_to root_path
    else
       redirect_to group
    end
 end

Show.html.erb

  <% if this_membership.active %>
    <%= link_to 'Pause', this_membership, controller: :memberships, method: :toggleoff, style: 'color:#ccc' %>
  <% else %>
    <%= link_to 'Start', this_membership, controller: :memberships, method: :toggleon, style: 'color:green' %>
  <% end %>

错误文本

Started POST "/memberships/13" for 127.0.0.1 at 2011-09-27 23:35:35 +0100

ActionController::RoutingError (No route matches "/memberships/13"):

我可以很好地销毁会员资格，但事实证明切换会员资格活动很棘手.

I can destroy memberships just fine but toggling the membership activity is proving tricky.

提前致谢！

                  <%= link_to("Pause", membership_toggle(@membership), :method => :put, :title => "This toggles it off") %>
                  <% else %>
                  <%= link_to("Toggle On", membership_toggle(@membership), :method => :put, :title => "This toggles it on") %>

和

def toggle
   @membership = Membership.find(params[:id])
   @membership.toggle!(active)
end

和

resources :memberships do
   member do
      put :toggle
   end
end

现在给我这个错误...

now gives me this error...

undefined method `membership_toggle' for #<#<Class:0x00000102e69bc0>:0x00000102e66ec0>

推荐答案

使用您的路由的链接将是:

Links using your routes are going to be:

link_to("Toggle On", membership_toggleon_url(membership), :method => :put, :title => "This toggles it on")
link_to("Toggle Off", membership_toggleoff_url(membership), :method => :put, :title => "This toggles it off")

您需要提供 :method =>:put 到 link_to 方法，因为这就是你在路由文件中的路由.

You need to supply :method => :put to the link_to method given that's what you have the route as in your routes file.

这样的事情可以通过一个动作来实现:

Something like this can be achieved with a single action:

resources :memberships do
  member do
    put :toggle
  end
end

然后您可以使用 Rails toggle 方法.

Then you can make use of a single boolean field in your controller by using the Rails toggle method.

这将让您执行以下操作:

This will let you do something like:

@membership.toggle(:on)

这篇关于使用 link_to 切换布尔值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！