Ruby-on-rails link_to 当前页面加上/与参数合并
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link_to the current page plus/merged with a param
提问by Steven
A bit of a softball question, but my Google Fu escapes me at the moment.
有点垒球问题，但我的 Google Fu 此刻让我逃过了一劫。
How do I link to the current page but then specify params to be merged into the query string?
如何链接到当前页面，然后指定要合并到查询字符串中的参数？
For instance, if the current page is /resources, I want to be able to specify something like current_page_plus(:param => 'attribute')that evaluates out to /resources?param=attribute.
例如，如果当前页面是/resources，我希望能够指定类似current_page_plus(:param => 'attribute')评估为 的内容/resources?param=attribute。
This would hopefully also merge with existing attributes, so if the current page was /resources?a=b&c=d, then current_page_plus(:c => 'e')would evaluate to /resources?a=b&c=e.
这也有望与现有属性合并，因此如果当前页面是/resources?a=b&c=d，current_page_plus(:c => 'e')则将评估为/resources?a=b&c=e。
回答by Simone Carletti
You can use url_forpassing the params.
您可以使用url_for传递参数。
url_for(params.merge(:c => "e"))
If you use an helper like link_tothat internally uses url_foryou can skip the url_forand pass the has directly.
如果您使用link_to内部使用的助手，则url_for可以跳过url_for并直接传递 has。
link_to "Page", params.merge(:c => "e")
