CODEWITHSUNDEEP
ruby-on-railsruby-on-rails-4
frostbite
frostbite

Reputation: 688

How to access params in post request

Scenario: a user (class: User) wants to apply to a course (class: Course) online, by creating an application (class Application).

They visit an application page, at /applications/:id where id is the course id. This is the controller:

  def new
    @course = Course.find_by_id(params[:id])
    @application = Application.new
  end

  def create
    @application = Application.new(application_params)

    @course = Course.find_by_id(params[:id])

    @application.course_id = @course.id
    @application.save
  end

This line fails

@course = Course.find_by_id(params[:id])

because in the method that handles the POST request you can't access the parameters, but I require them to set the course_id on the application.

Upvotes: 0

Views: 140

Answers (2)

7urkm3n
7urkm3n

Reputation: 6321

If your Routes nested and associated, You can use ActiveRecord method since rails can done for less code.

def create
   @course = Course.find(params[:id]) #if its nested and associated then (params[:course_id])
   @application = @course.applications.new(application_params)
   @application.save
end

Upvotes: 1

baron816
baron816

Reputation: 701

A new_whatever_path link will only pass an id if the resource is nested. So I think you're routes should look something like:

resources :course do
    resources :application, only: [:new, :create]
end

And then you can do a link_to "Apply:, new_course_application_path(@course), etc.

Upvotes: 2

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