Ruby-on-rails 显示快闪消息的最佳实践方法
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Best practice method of displaying flash messages
提问by Steve
I'm wondering what's the best practice for displaying flash messages. The two main ways I've seen are using something like this scaffold generated code
我想知道显示 Flash 消息的最佳做法是什么。我见过的两种主要方法是使用类似这种脚手架生成的代码
<p id="notice"><%= notice %></p>
or placing code like this in your application header.
或将这样的代码放置在您的应用程序标头中。
<% if !flash.empty? %>
<div id="flash">
<% flash.keys.each do |k| %>
<div class="<%= k %>">
<%= flash[k] %>
</div>
<% end %>
</div>
<% end %>
It appears to me that the first method adds more flexibility while the latter improves code readability and eliminates redundancy. Is there a method most rails developers prefer? As a side question how does scaffolding implement notice? Is it just a helper that accesses the flash hash? Why go through the trouble of using the helper when you can directly use the flash hash? Thanks
在我看来，第一种方法增加了更多的灵活性，而后者提高了代码的可读性并消除了冗余。有没有大多数 Rails 开发人员更喜欢的方法？作为一个附带问题，脚手架如何实施通知？它只是访问闪存哈希的助手吗？当您可以直接使用闪存哈希时，为什么还要麻烦使用助手？谢谢
回答by zolter
I'm doing it this way:
我是这样做的：
<% flash.each do |key, value| %>
<%= content_tag :div, value, class: "flash #{key}" %>
<% end %>
回答by user664833
Calling a partial keeps your application.html.erbeven cleaner..
调用部分可以让你application.html.erb更干净..
<%= render 'shared/flash_messages' if !flash.empty? %>
.. and in the partial do something like what @zolter mentioned:
..并在部分做一些@zolter提到的事情：
<div id="flash_messages">
<% flash.each do |key, value| %>
<%= content_tag(:div, value, :class => "flash #{key}") %>
<% end %>
</div>
回答by fjyaniez
Why not put the second method on a helper function so it doesn't affect code readability on layouts?
为什么不将第二种方法放在辅助函数上，这样它就不会影响布局上的代码可读性？
回答by ümit ?ztürk
<% if flash[:notice] %>
<div class="notification is-primary global-notification">
<p class="notice"><%= notice %></p>
</div>
<% end %>
<% if flash[:alert] %>
<div class="notification is-danger global-notification">
<p class="alert"><%= alert %></p>
</div>
<% end %>
