Add order field to widget cards

We will use this field to enter the position where the cards will be shown to the
user in the homepage.

app/models/widget/card.rb

@@ -10,6 +10,7 @@ class Widget::Card < ApplicationRecord
 
   validates_translation :title, presence: true
   validates :link_url, presence: true, if: -> { !header? || link_text.present? }
+  validates :order, numericality: { greater_than_or_equal_to: 1 }
 
   def self.header
     where(header: true)

db/migrate/20231009143355_add_order_to_widget_cards.rb

@@ -0,0 +1,5 @@
+class AddOrderToWidgetCards < ActiveRecord::Migration[6.1]
+  def change
+    add_column :widget_cards, :order, :integer, null: false, default: 1
+  end
+end

db/schema.rb

@@ -1768,6 +1768,7 @@ ActiveRecord::Schema.define(version: 2023_10_12_141318) do
     t.integer "cardable_id"
     t.integer "columns", default: 4
     t.string "cardable_type", default: "SiteCustomization::Page"
+    t.integer "order", default: 1, null: false
     t.index ["cardable_id"], name: "index_widget_cards_on_cardable_id"
   end
 

spec/models/widget/card_spec.rb

@@ -18,6 +18,16 @@ describe Widget::Card do
       expect(build(:widget_card, title: "")).not_to be_valid
     end
 
+    describe "order" do
+      it "is not valid without an order" do
+        expect(build(:widget_card, order: nil)).not_to be_valid
+      end
+
+      it "is not valid with an order less than 1" do
+        expect(build(:widget_card, order: 0)).not_to be_valid
+      end
+    end
+
     context "regular cards" do
       it "is not valid without a link_url" do
         card = build(:widget_card, header: false, link_url: nil)