我有 has_many 关联并希望获取用户网站,并且从控制台 user.websites 给了我所有网站的列表,但是当我在控制器中尝试时:
def index
@websites = User.find(params[:user_id]).websites
end
给我错误:编辑
Rendered C:/Ruby193/lib/ruby/gems/1.9.1/gems/actionpack-3.2.2/lib/action_dispatch/middleware/templates/rescues/_trace.erb (3.0ms)
Rendered C:/Ruby193/lib/ruby/gems/1.9.1/gems/actionpack-3.2.2/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (1.0ms)
Rendered C:/Ruby193/lib/ruby/gems/1.9.1/gems/actionpack-3.2.2/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (99.0ms)
←[1m←[36mUser Load (2.0ms)←[0m ←[1mSELECT `users`.* FROM `users` WHERE `users`.`id` =67 LIMIT 1←[0m
Completed 500 Internal Server Error in 2ms
ActiveRecord::RecordNotFound (Couldn't find User without an ID):
app/controllers/websites_controller.rb:10:in `index'
但我已登录并且确实有 id = 67 的用户:
User.find(67)
=> #<User id: 67, first_name: "admin", ...
在我看来:
<% @websites.each do |website| %>
<%= website.name %>
<%= website.url %>
<p> <%= website.category %>
<%= website.language %>
<%end%>
EDIT.Tried 在索引视图中检查 params[:user_id] ,这并没有向我显示任何内容:
<%= params[:user_id]%>
为什么我收到错误?