Add Voucher model

A voucher belongs to an enterprise and an enterprise can have many
vouchers

app/models/enterprise.rb

@@ -65,6 +65,7 @@ class Enterprise < ApplicationRecord
   has_many :inventory_items
   has_many :tag_rules
   has_one :stripe_account, dependent: :destroy
+  has_many :vouchers
 
   delegate :latitude, :longitude, :city, :state_name, to: :address
 

app/models/voucher.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: false
+
+class Voucher < ApplicationRecord
+  belongs_to :enterprise
+
+  validates :code, presence: true, uniqueness: { scope: :enterprise_id }
+end

db/migrate/20230215034821_create_vouchers.rb

@@ -0,0 +1,12 @@
+class CreateVouchers < ActiveRecord::Migration[6.1]
+  def change
+    create_table :vouchers do |t|
+      t.string :code, null: false, limit: 255
+      t.datetime :expiry_date
+
+      t.timestamps
+    end
+    add_reference :vouchers, :enterprise, foreign_key: true
+    add_index :vouchers, [:code, :enterprise_id], unique: true
+  end
+end

db/schema.rb

@@ -1197,6 +1197,16 @@ ActiveRecord::Schema[7.0].define(version: 2023_02_13_160135) do
     t.index ["user_id"], name: "index_webhook_endpoints_on_user_id"
   end
 
+  create_table "vouchers", force: :cascade do |t|
+    t.string "code", limit: 255, null: false
+    t.datetime "expiry_date"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+    t.bigint "enterprise_id"
+    t.index ["code", "enterprise_id"], name: "index_vouchers_on_code_and_enterprise_id", unique: true
+    t.index ["enterprise_id"], name: "index_vouchers_on_enterprise_id"
+  end
+
   add_foreign_key "active_storage_attachments", "active_storage_blobs", column: "blob_id"
   add_foreign_key "active_storage_variant_records", "active_storage_blobs", column: "blob_id"
   add_foreign_key "adjustment_metadata", "enterprises", name: "adjustment_metadata_enterprise_id_fk"
@@ -1302,4 +1312,5 @@ ActiveRecord::Schema[7.0].define(version: 2023_02_13_160135) do
   add_foreign_key "variant_overrides", "enterprises", column: "hub_id", name: "variant_overrides_hub_id_fk"
   add_foreign_key "variant_overrides", "spree_variants", column: "variant_id", name: "variant_overrides_variant_id_fk"
   add_foreign_key "webhook_endpoints", "spree_users", column: "user_id"
+  add_foreign_key "vouchers", "enterprises"
 end

spec/models/enterprise_spec.rb

@@ -24,6 +24,7 @@ describe Enterprise do
     it { is_expected.to have_many(:distributed_orders) }
     it { is_expected.to belong_to(:address) }
     it { is_expected.to belong_to(:business_address) }
+    it { is_expected.to have_many(:vouchers) }
 
     it "destroys enterprise roles upon its own demise" do
       e = create(:enterprise)

spec/models/voucher_spec.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Voucher do
+  describe 'associations' do
+    it { is_expected.to belong_to(:enterprise) }
+  end
+
+  describe 'validations' do
+    subject { Voucher.new(code: 'new_code', enterprise: enterprise) }
+
+    let(:enterprise) { build(:enterprise) }
+
+    it { is_expected.to validate_presence_of(:code) }
+    it { is_expected.to validate_uniqueness_of(:code).scoped_to(:enterprise_id) }
+  end
+end