Ruby on Rails的f.select与自定义属性选项 [英] ruby on rails f.select options with custom attributes

问题描述

我有一个表格select语句，像这样的：

  = f.select：COUNTRY_ID，@ countries.map {| C | [c.name，c.id]}
 

这将导致该code：

  ...
＆LT;期权价值=1＆GT;安道尔＆LT; /选项＆GT;
＆LT;期权价值=2＆GT;阿根廷＆LT; /选项＆GT;
...
 

但我想自定义的HTML属性添加到我的选择，像这样的：

  ...
＆LT;期权价值=1currecy_ code =XXX＆GT;安道尔＆LT; /选项＆GT;
＆LT;期权价值=2currecy_ code =YYY＆GT;阿根廷＆LT; /选项＆GT;
...
 

解决方案

Rails可以添加自定义属性来选择选项，使用现有的options_for_select帮手。你几乎有它的权利在你的问题中code。使用HTML5数据属性：

 ＆LT;％= f.select：COUNTRY_ID，options_for_select（@ countries.map {| C | [c.name，c.id，{'数据currency_ code '=＆GT; c.currency_ code}]}）％GT;
 

添加一个初始的选择：

 ＆LT;％= f.select：COUNTRY_ID，options_for_select（@ countries.map {| C | [c.name，c.id，{'数据currency_ code '=＆GT; c.currency_ code}]}，SELECTED_KEY = f.object.country_id）％GT;
 

如果您需要分组的选择，你可以使用grouped_options_for_select帮手，像这样的（如果@continents是，每一个都具有国家法的大陆对象的数组）：

 ＆LT;％= f.select：COUNTRY_ID，grouped_options_for_select（@ continents.map {|组| [group.name，group.countries.map {| C | [c.name ，c.id，{'数据currency_ code'=＆GT; c.currency_ code}]}]}，SELECTED_KEY = f.object.country_id）％GT;
 

信贷应该去保罗@ pogodan谁张贴了关于在文档中没有找到这一点，但通过阅读导轨来源。 <一href=\"https://web.archive.org/web/20130128223827/http://www.pogodan.com/blog/2011/02/24/custom-html-attributes-in-options-for-select\">https://web.archive.org/web/20130128223827/http://www.pogodan.com/blog/2011/02/24/custom-html-attributes-in-options-for-select

I have a form select statement, like this:

= f.select :country_id, @countries.map{ |c| [c.name, c.id] }

Which results in this code:

...
<option value="1">Andorra</option>
<option value="2">Argentina</option>
...

But I want to add a custom HTML attribute to my options, like this:

...
<option value="1" currecy_code="XXX">Andorra</option>
<option value="2" currecy_code="YYY">Argentina</option>
...

解决方案

Rails CAN add custom attributes to select options, using the existing options_for_select helper. You almost had it right in the code in your question. Using html5 data-attributes:

<%= f.select :country_id, options_for_select(@countries.map{ |c| [c.name, c.id, {'data-currency_code'=>c.currency_code}] }) %>

Adding an initial selection:

<%= f.select :country_id, options_for_select(@countries.map{ |c| [c.name, c.id, {'data-currency_code'=>c.currency_code}] }, selected_key = f.object.country_id) %>

If you need grouped options, you can use the grouped_options_for_select helper, like this (if @continents is an array of continent objects, each having a countries method):

<%= f.select :country_id, grouped_options_for_select(@continents.map{ |group| [group.name, group.countries.map{ |c| [c.name, c.id, {'data-currency_code'=>c.currency_code}] } ] }, selected_key = f.object.country_id) %>

Credit should go to paul @ pogodan who posted about finding this not in the docs, but by reading the rails source. https://web.archive.org/web/20130128223827/http://www.pogodan.com/blog/2011/02/24/custom-html-attributes-in-options-for-select

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