Rails - 动态切换 link_to 中的确认消息

Question

我面临着这种丑陋的重复，以便在我看来显示不同的确认消息。

<% if current_user.password.nil? and current_user.services.count == 1 %>
  <%= link_to "Disconnect #{service.provider.capitalize}", service, :confirm => 'Remove this service will delete your account, are you sure?', :method => :delete %>
<% else %>
  <%= link_to "Disconnect #{service.provider.capitalize}", service, :confirm => 'Are you sure you want to remove this authentication option?', :method => :delete %>
<% end %>

我很高兴知道是否有办法避免这种情况？

谢谢你！

编辑：

ActionView::Template::Error (/Users/benoit/rails_projects/website/app/views/services/index.html.erb:15: syntax error, unexpected ',', expecting ')'
...e this authentication option?', :method => :delete, :class =...
...                               ^):
    12:         <% for service in @services %>
    13:           <div class="service">
    14:             <%= image_tag "logo_#{service.provider}.png", :class => "left" %>
    15: <%= link_to "Disconnect #{service.provider.capitalize}", service, :confirm => current_user.password.nil? and current_user.services.count == 1 ? 'Remove this service will delete your account, are you sure?' : 'Are you sure you want to remove this authentication option?', :method => :delete, :class => "remove" %>
    16: 
    17:             <div class="clear"></div>
    18:           </div>

Answer 1

只需执行：

<%= link_to "Disconnect #{service.provider.capitalize}", service, :confirm => current_user.password.nil? and current_user.services.count == 1 ? 'Remove this service will delete your account, are you sure?' : 'Are you sure you want to remove this authentication option?', :method => :delete, :class => "remove" %>

或者如果您这样做更容易理解：

<% confirm_message = current_user.password.nil? and current_user.services.count == 1 ? 'Remove this service will delete your account, are you sure?' : 'Are you sure you want to remove this authentication option?' %>

<%= link_to "Disconnect #{service.provider.capitalize}", service, :confirm => confirm_message, :method => :delete, :class => "remove" %>

我正在使用 Ruby 三元运算符，请检查它： http://invisibleblocks.wordpress.com/2007/06/11/rubys-other-ternary-operator/

Answer 2

您可以创建一个辅助函数：

def auth_confirm_delete(current_user)
  if current_user.password.nil? and current_user.services.count == 1
      'Remove this service will delete your account, are you sure?'
  else 
      'Are you sure you want to remove this authentication option?'
  end
end 

然后它在视图中看起来更好：

<%= link_to "Disconnect #{service.provider.capitalize}", service, :confirm => auth_confirm_delete, :method => :delete %>