Question

我有一个课程和教学大纲模型定义如下

class Course < ActiveRecord::Base
    has_many :enrollments
    has_many :students, through: :enrollments, class_name: "User"
    has_many :syllabuses

end

class Syllabus < ActiveRecord::Base
    belongs_to :course
end

像这样定义的路线

resources :courses do
    resource :syllabuses
  end

我的html有一个编辑教学大纲的链接

<td><%= link_to "Edit", edit_course_syllabuses_path, class: "btn btn-primary"  %></td>

rake路线向我展示了这个

edit_course_syllabuses GET    /courses/:course_id/syllabuses/edit(.:format) syllabuses#edit

服务器日志显示请求处理，如

Started GET "/courses/46/syllabuses/edit" for ::1 at 2015-02-04 20:55:43 +0530
Processing by SyllabusesController#edit as HTML
  Parameters: {"course_id"=>"46"}
  Syllabus Load (0.3ms)  SELECT  "syllabuses".* FROM "syllabuses" WHERE "syllabuses"."id" = $1 LIMIT 1  [["id", nil]]
Completed 404 Not Found in 2ms

ActiveRecord::RecordNotFound - Couldn't find Syllabus with 'id'=:

如何将课程提纲ID传递给教学大纲控制器编辑操作？

Answer 1

由于您有has_many关联，因此您还需要resources :syllabuses（请注意 s ）。

更改它，重新启动服务器并运行以下代码以查看所有路由：

bundle exec rake routes

您的路径现在是edit_course_syllabuse，您可以像以下一样使用它：

<%= link_to "Edit", edit_course_syllabuses_path(@syllabuse), class: "btn btn-primary"  %>

您可以在Raild guide

中详细了解嵌套资源

Rails 4 - 嵌套资源路由

1 个答案: