使用带有参数和form_tag的命名路由 [英] Using named routes with parameters and form_tag

问题描述

我正在尝试在Rails中创建一个简单的搜索表单，但是我想我缺少了一些东西.

I'm trying to create a simple search form in Rails, but I think I'm missing something.

我有一个搜索的命名路线:

I have a named route for search:

map.search ":first_name/:last_name", :controller => "home", :action => "search"

我正在尝试在搜索表单中使用它:

I'm trying to use that in my search form:

<% form_tag(search_path, :method => 'get') do %>
  <%= text_field_tag(:first_name) %>
  <%= text_field_tag(:last_name) %>
  <%= submit_tag("Search") %>
<% end %>

但是当我加载搜索表单时，我得到了一个ActionController :: RoutingError:

But when I load up the search form I get an ActionController::RoutingError:

search_url无法从{:action =>"search"，:controller =>"home"}生成-您的路由可能不明确，或者可能需要为此路由提供其他参数. content_url具有以下必需参数:[:first_name，:last_name]-它们是否都满足?

search_url failed to generate from {:action=>"search", :controller=>"home"} - you may have ambiguous routes, or you may need to supply additional parameters for this route. content_url has the following required parameters: [:first_name, :last_name] - are they all satisfied?

我想念什么?我认为在表单中定义的字段会自动与我的路线参数链接起来. :-/

What am I missing? I thought the fields defined in my form would be automatically linked up with my route parameters. :-/

更新:

我了解到search_path是在现在显示表单之前生成的，因此无法更新.事后看来很明显！

I understand that search_path is generated before the form is displayed now, so it can't be updated. Obvious in hindsight!

我更改了路线:

map.search 'search', :controller => "home", :action => "search"
map.name ':first_name/:last_name', :controller => "home", :action => "name"

现在search动作就可以了:

def search
  redirect_to name_path(params)
end

一切正常！此处的主要目标是从名称命名路由中获取该URL，作为进行搜索的结果.谢谢大家！

It all works a treat! The main goal here was getting that URL from the name named route as result of doing a search. Thanks guys!

推荐答案

form_for生成表单，并且必须指定创建search_path所需的所有参数，因此它应类似于:

form_for generates form and it has to have specified all parameters that are needed to create search_path, so it should look like:

<% form_tag(search_path, :firstname => 'some_text', :lastname => 'some_text', :method => 'get') do %>

或至少类似这样的东西. HTML标记form具有参数action='/some/url'，这就是为什么必须为search_path指定所有参数的原因.但是上面的示例无法按预期工作.

or at least something like this. HTML tag form has parameter action='/some/url' and that's why you have to specify all parameters for search_path. But the above example won't work as you expected.

那你能做什么?

1. 创建一个具有action='/'并使用js的空表单，然后再将其替换为输入文本字段的内容，然后再提交.

1. Create empty form that has action='/' and with js replace it with content of your input text fields before submitting.

在示例/search上创建另一条路由，该路由从Submit检索参数，然后重定向到正确的路径.

Create another route, on example /search that recives parameters from submit and then redirects to correct path.

可能还有一些更好的方法；)

Probably there is also some better ways to do it ;)

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