Define an endpoint to expose the list of expenses

app/controllers/expenses_controller.rb

@@ -4,4 +4,8 @@ class ExpensesController < ApplicationController
   def summary
     render json: Expenses::TotalQuery.new.call
   end
+
+  def index
+    render json: Expense.all.order(pricing_type: :asc, amount: :desc).as_json(only: %i[id name amount pricing_type])
+  end
 end

config/routes.rb

@@ -6,7 +6,7 @@ Rails.application.routes.draw do
     post :import, on: :collection
     post :bulk_update, on: :collection
   end
-  resources :expenses do
+  resources :expenses, only: :index do
     get :summary, on: :collection
   end
   resources :tables_arrangements, only: [:index, :show]