[英]using variables in rails erb
I'm coming from a .net c# razor background, so I'm wondering how I might do the following in rails .erb view. 我来自.net c#剃须刀背景,所以我想知道如何在rails .erb视图中执行以下操作。
Razor: 剃刀:
@{var i = 0}
<table>
<tr><th>name</th></tr>
@foreach item in collection{
<tr>
<td>@i++.@item.name</td>
</tr>
}
</table>
I want a way to use an iteration variable in the view. 我想要一种在视图中使用迭代变量的方法。 Does a rails erb file have the ability to do this? Rails erb文件是否可以执行此操作? where I can create the variable in the view and interact with it? 在哪里可以在视图中创建变量并与之交互?
thanks in advance. 提前致谢。
The docs pretty much answer this: https://apidock.com/ruby/ERB 文档几乎回答了这个问题: https : //apidock.com/ruby/ERB
Although I wouldn't do it like that, rather: 尽管我不会那样做,但是:
<table>
<tr><th>name</th></tr>
<% collection.each_with_index do |item, i| %>
<tr>
<td>
<%= i %>. <%= item %>
</td>
</tr>
<% end %>
</table>
To answer your specific but non-canonical-Ruby question, sure: 要回答您的特定但非规范的Ruby问题,请确保:
<% i = 0 %>
<table>
<% collection.each do |item| %>
<!-- Etc -->
<%= i += 1 %>
(Not clear to me if you want zero- or one-based indexing; adjust all examples as required.) (如果您要基于零或一的索引,我不太清楚;请根据需要调整所有示例。)
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