Rails 4 - Nested resource routing

manpreet Best Answer 2 years ago

I have a course and syllabus models defined like this

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

Routes defined like this

resources :courses do
    resource :syllabuses
  end

My html has a link to edit syllabus

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

rake routes shows me this

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

server log shows the request processing like

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'=:

How to pass the syllabus id to the syllabus controller edit action ?