助手中的动态路径 [英] Dynamic Paths in Helper

问题描述

我正在为管理员链接创建一个帮助程序。在不同的
视图中，我有代码

 <％if current_user％> 
<％= link_to编辑，edit_model_path（model）％> 
<％= link_toNew，new_model_path％> 
<％= link_to删除，model，：confirm => 你是一个Noob，方法
 => ：删除％> 
<％end％> 
  

只有在登录时才显示这些。

我想在他们的地方做这样的事情

 <％= admin_links（model）％> 
  

并将当前项目传递到应用程序帮助程序

$ b $如果current_user
a =＃{link_toeditedit_m_path（m）}
a ＃{link_tonewnew_m_path}
a<< ＃{link_to删除，m，：confirm =>你的Noob，：方法
=>：delete}
end
end

或类似的东西。

解决方案

基本上你需要将模型的类名转换成指向正确路径的东西。

  model_name = m.class.to_s.underscore 
  

然后使用它来调用相应的路径方法

  link_toedit，send（edit_＃ {model_name} _path，m）
  

除此之外，您不需要将link_tos在＃{} 中，因为该函数只返回一个字符串。

I'm trying to create a helper method for my admin links. In quite a few views I have the code

<% if current_user %>
<%= link_to "Edit", edit_model_path(model) %>
<%= link_to "New", new_model_path %>
<%= link_to "Delete", model, :confirm => "You're a Noob",  :method
=> :delete %>
<% end %>

that only display these when logged in.

I would like to do something like this in their place

<%= admin_links(model) %>

and pass the current item into the application helper method

def admin_links(m)
 if current_user
  a = "#{link_to "edit" edit_m_path(m)}"
  a << "#{link_to "new" new_m_path}"
  a << "#{link_to "Delete", m, :confirm => "Your a Noob",  :method
=> :delete}"
 end
end

Or something of the like.

解决方案

basically you need to transform the class name of the model into something pointing to the correct path.

model_name = m.class.to_s.underscore

And then use it to call the appropriate path methods

link_to "edit", send("edit_#{model_name}_path", m)

As an aside, you don't need to put the link_tos in #{} because that function simply returns a string.

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