ruby – Rails: What route to let show one resource but submit to another?

I’m sketching out a data model for a Rails app that lets users submit answers to technical questions. For example, the prompt might be:

Write a SQL query to determine the number of unique visitors last week

My models would look like this:

class User < ApplicationRecord
  has_many :submissions

class Submission < ApplicationRecord
  belongs_to :user
  belongs_to :question

class Question < ApplicationRecord
  has_many :submissions

I’d like a user to be able to visit a page that will display:

  1. The question’s prompt
  2. The user’s previous submissions for this question
  3. A form that lets the user create a new submission for this question

How should I set up my routes given these requirements? I’m pretty lost but am thinking I could use nested resources in my routes.rb:

# not sure order matters here; I've usually seen nested routes be 
# ordered by the has many relationship.  so if A has many B and B has 
# many C, then the nesting order is A, B, C.

resources :questions do  
  resources :users do
    resources :submissions

If I did that, a specific user submitting an answer to a specific question could be:

POST to /questions/:question_id/users/:user_id/submissions

Then my controller’s create action could look like this:

class SubmissionController < ApplicationController
  def create
    @question = Question.find(params(:question_id))
    @user = User.find(params(:user_id))
    Submission.create(params(:submission), user: current_user, question: @question)
    @submissions = Submission.where(user: @user, question: @question)
    redirect_to (@question, @user)

Is there a more RESTful / Rails-ey way to go about the above? If there’s not, does the ordering of my nested routes matter? Thanks in advance for any help you can offer!