Ruby-on-rails 如何在 Rails 中获取 URL 参数？
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How to get URL parameters in Rails?
提问by Alex
When a POST request is processed, params[:id] returns the value of "id" stored in the form that was posted.
处理 POST 请求时，params[:id] 返回存储在已发布表单中的“id”值。
However I want to get the value stored in the url (query string).
但是我想获取存储在 url 中的值（查询字符串）。
def some_action
id = params[:id] # Gets id from here: /some_action?id=[VALUE] only when request.post? is false
if request.post?
# Do some stuff, can't get the id value from the url
...
end
So how to get the value from the URL in a POST request?
那么如何从 POST 请求中的 URL 中获取值呢？
回答by Marcel Falliere
it's the same actually as GET parameters. To prove that, I have a search form that posts one parameter to the same action :
它实际上与 GET 参数相同。为了证明这一点，我有一个搜索表单，将一个参数发布到同一操作：
def invite
if request.post?
search= [params[:search]]
#...
end
end
And in the view - maybe your problem comes from this
在视图中 -也许你的问题来自于此
<% form_tag do %>
<%= text_field_tag :search, params[:search] %>
<%= submit_tag "Rechercher" %>
<% end %>
