如何让 options_for_select 兑现标签
我试图根据其层次结构级别缩进选择的类别列表中的选项，例如 Category、 Subcategory、 Subsubcategory代码>.
我尝试过： <% options = options_for_select @categories.map{|c| [(" " * c.level) + c.name, c.id]} %>, 但这会呈现为 &nsbp;Subcategory 和 Subsubcategory。
我尝试过： <% options = options_for_select @categories.map{|c| [(" " * c.level) + c.name, c.id]} %>, 但这会忽略空格并呈现为 Subcategory 和 Subsubcategory。
作为测试，我尝试了 <%= (" " * 3) + "hello" %>，这呈现了我期望的效果： ; 你好。
有谁知道如何获得我正在寻找的结果？
I'm trying to indent options in a select list of categories based upon their hierarchical level, e.g. Category, Subcategory, Subsubcategory.
I've tried:<% options = options_for_select @categories.map{|c| [(" " * c.level) + c.name, c.id]} %>,
but this renders as &nsbp;Subcategory and Subsubcategory.
I've tried:<% options = options_for_select @categories.map{|c| [(" " * c.level) + c.name, c.id]} %>,
but this ignores the spaces and renders as Subcategory and Subsubcategory.
As a test, I tried <%= (" " * 3) + "hello" %>, and this renders how I'd expect it to: hello.
Does anyone know how to get the results I'm looking for?
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尝试使用
((" " * c.level) + c.name).html_safe。问题出在使用html_escape的options_for_select辅助方法中，该方法会转义您的html_safe将允许从options_for_select帮助器调用html_escape方法来避免转义空格。Try using
((" " * c.level) + c.name).html_safe. The problem is in theoptions_for_selecthelper method usinghtml_escape, which escapes yourhtml_safewill allow thehtml_escapemethod called from theoptions_for_selecthelper to avoid escaping the spaces.