如何使用remote_function将主题参数发送到控制器？
假设这种形式：
<% form_for(@student) do |f| %>
<%= f.select(:subject_id,
options_from_collection_for_select(@subjects, :id, :name),
{:prompt => 'Select a subject' },
{:onChange => "#{remote_function(:update => :student_exam_id,
:url => {
:action => :update_exams_list,
:subject_id => 1
}
)
}" } ) %>
<%= f.select(:exam_id,
options_from_collection_for_select(@exams, :id, :title) ) %>
<% end %>
当用户选择一个科目时，必须使用属于所选科目的考试更新考试选择器列表。
如何将主题参数发送到控制器？我尝试使用 :subject_id => 发送参数1，但它不起作用。
请建议我一些方法来做到这一点。
如果您需要更多信息，请询问我。
非常感谢。 问候。
Suppose this form:
<% form_for(@student) do |f| %>
<%= f.select(:subject_id,
options_from_collection_for_select(@subjects, :id, :name),
{:prompt => 'Select a subject' },
{:onChange => "#{remote_function(:update => :student_exam_id,
:url => {
:action => :update_exams_list,
:subject_id => 1
}
)
}" } ) %>
<%= f.select(:exam_id,
options_from_collection_for_select(@exams, :id, :title) ) %>
<% end %>
When user selects a subject, then exams selector list must be updated with exams belongs to selected subject.
How can I send subject parameter to controller? I tried to send parameter using :subject_id => 1, but it does not work.
Please suggest me some ways to make this.
If you need more info, please ask me.
Thank you very much.
Greetings.
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嘿，我可以详细地回答你的问题。相反，您应该只观看此截屏视频：
http://railscasts.com/episodes/88-dynamic -select-menus
它解释了您需要什么以及更详细的说明。
希望有帮助。
Hey, I could answer your question with details. Instead you should only watch this screencast:
http://railscasts.com/episodes/88-dynamic-select-menus
It explanins what you need and with more detailed instructions.
Hope it helps.
我改变了我的选择：
并且它有效。 ：D
I changed my select:
and it works. :D