如何在Rails link_to中生成自定义排序查询字符串URL? [英] How to generate custom sorted query string URL in Rails link_to?

问题描述

当我在Rails 3.0.7应用程序中使用具有许多参数的link_to帮助器时，它会生成按字典顺序排序的url，这可能在Activesupport文档中的Hash的to_param方法中提到过.例如

When I use link_to helper in Rails 3.0.7 app with many parameters, it generates a lexicographically sorted url as probably mentioned in the to_param method for Hash in Activesupport documentation. e.g.

link_to "my Link", {:u=>"user", :q=>"some query", :page=>"4"}

产生

"/search?page=4&q=some+query&u=user"

但是我想要的是

"/search?u=user&q=some+query&page=4"

任何人都可以像params哈希中提供的那样对link_to或url_for进行自定义排序吗?

Anyone able to do custom sorting as supplied in the params hash to link_to or url_for ?

除非我丢失了某些内容，否则这似乎与文档中link_to(ri link_to或文件/gems/actionpack-3.0.7/lib/action_view/helpers/url_helper.rb:215

Unless I am missing something, this seems to contradict the example given in the documentation for link_to (either ri link_to or in file /gems/actionpack-3.0.7/lib/action_view/helpers/url_helper.rb:215

  #   link_to "Nonsense search", searches_path(:foo => "bar", :baz => "quux")
  #   # => <a href="/searches?foo=bar&amp;baz=quux">Nonsense search</a>

当然，我可以像

link_to "my Link", "/search?u=#{user}&q=#{query}&page=#{page}"

但是这将丢失"Rails方式"，并且在转义某些字符方面存在一些问题，因此最后一种选择.

but that would be missing the 'Rails way' and has some issue in Escaping certain chars, so would be the last option.

推荐答案

在rails的提交日志中，似乎在<3> 0.2左右的版本中重新引入了 to_param sort .这是日志:

Digging through the commit logs of rails, it appears that to_param sort is being re-introduce in rails 3.0.2 or so. Here is log:

 $ git log activesupport/lib/active_support/core_ext/object/to_param.rb
...
commit 10dec0e65e1f4d87f411b4361045eba86b121be9
Author: Xavier Noria <[e-mail]>
Date:   Tue Sep 28 00:32:20 2010 +0200

    let Hash#to_param and Hash#to_query sort again

    This was a regression introduced in 5c858220085dc4ddc1bec496747059dfbe32f1da. We bring
    sorting back because people rely on it, eg for constructing consistent cache keys.

commit 5c858220085dc4ddc1bec496747059dfbe32f1da
Author: Santiago Pastorino <[e-mail]>
Date:   Thu Jul 22 05:08:34 2010 +0800

    Hash#to_param is doesn't use sort anymore, some tests added for Hash#to_param

...

我通过删除".sort"对文件进行了猴子修补，查询字符串的顺序是所需的.能否实现自定义to_param是获取自定义排序/不排序查询字符串的解决方案?在那种情况下，应该放在哪里?

I monkey-patched the file by removing ".sort" and the order of query string is as desired. Could implementing a custom to_param be solution to getting a custom sort/no-sort query string? In that case, where should it be put?

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