视图中 .html.erb 中的 if else 语句 [英] If else statements in .html.erb in views

问题描述

在 Rails 中，我经常遇到这样的情况，在视图中我会做类似的事情

In rails, I often run into the situation where inside the views I'll do something like

<% if @some_condition_previusly_established_in_a_controller %>
 <div class="one">123</div>
<% else %>
 <div class="two">something else</div>
<% end %>

看起来有点乱.这是一种可以接受的处理视图的方式吗?

It looks a bit cluttery. Is this an acceptable way of working with views or not?

推荐答案

除非你能想办法将它重写为辅助方法，否则你基本上会被它看起来有点难看.ERB 就是这样，因为它的目的是将 Ruby 注入到其他纯文本模板中的最小方式，而不是必须精简或优雅的东西.

Unless you can think of a way to re-write this as a helper method, you're basically stuck with it looking kind of ugly. That's just how ERB is, as it was intended to be a minimal way of injecting Ruby into an otherwise plain-text template, not as something necessarily streamlined or elegant.

好消息是语法高亮编辑器通常会使您的 <% ... %> ERB 块在视觉上与您的 HTML 不同，从而可以显着提高可读性.

The good news is a syntax-highlighting editor will usually make your <% ... %> ERB blocks look visually different from your HTML so that can dramatically improve readability.

这也是为什么创建了诸如 HAML 之类的其他表示形式，而这种语法却没有那么混乱:

It's also why other representations like HAML have been created where that syntax is a lot less cluttered:

- if some_condition_previusly_established_in_a_controller
  .one 123
- else
  .two something else

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