Add api setup

app/controllers/api/v1/comments_controller.rb

@@ -0,0 +1,22 @@
+class Api::V1::CommentsController < ApiController
+  before_action :authenticate_user!, except: [:index, :show]
+  before_action :set_comment, only: [:show]
+
+  def index
+    @comments = Comment.where(parent_id: nil).order(created_at: :desc)
+
+    render json: { comments: @comments }
+  end
+
+  def show; end
+
+  private
+
+  def comment_params
+    params.permit(:text)
+  end
+
+  def set_comment
+    @comment = Comment.find_by_id params[:id]
+  end
+end

app/controllers/api_controller.rb

@@ -0,0 +1,9 @@
+class ApiController < ApplicationController
+  before_action :set_default_request_format
+
+  private
+
+  def set_default_request_format
+    request.format = :json
+  end
+end

app/views/api/v1/comments/show.json.jbuilder

@@ -0,0 +1,4 @@
+json.id @comment.id
+json.text @comment.text
+json.parent_id @comment.parent_id
+json.user_id @comment.user_id

config/routes.rb

@@ -1,8 +1,10 @@
 Rails.application.routes.draw do
+  # for graphql
   if Rails.env.development?
     mount GraphiQL::Rails::Engine, at: "/graphiql", graphql_path: "/graphql"
   end
   post "/graphql", to: "graphql#execute"
+
   # default root route must exist for devise
   root 'comments#index'
 
@@ -17,4 +19,11 @@
   end
 
   devise_for :users
+
+  # api's
+  namespace :api do
+    namespace :v1 do
+      resources :comments
+    end
+  end
 end