Addressbook: Add foreign key, dependent/inverse_of options

core/app/models/concerns/spree/user_address_book.rb

@@ -5,7 +5,7 @@ module UserAddressBook
     extend ActiveSupport::Concern
 
     included do
-      has_many :user_addresses, foreign_key: "user_id", class_name: "Spree::UserAddress" do
+      has_many :user_addresses, foreign_key: "user_id", class_name: "Spree::UserAddress", inverse_of: :user, dependent: :destroy do
         def find_first_by_address_values(address_attrs)
           detect { |ua| ua.address == Spree::Address.new(address_attrs) }
         end
@@ -32,11 +32,29 @@ def mark_default(user_address, address_type: :shipping)
 
       has_many :addresses, through: :user_addresses
 
-      has_one :default_user_bill_address, ->{ default_billing }, class_name: 'Spree::UserAddress', foreign_key: 'user_id'
-      has_one :bill_address, through: :default_user_bill_address, source: :address
-
-      has_one :default_user_ship_address, ->{ default_shipping }, class_name: 'Spree::UserAddress', foreign_key: 'user_id'
-      has_one :ship_address, through: :default_user_ship_address, source: :address
+      has_one :default_user_bill_address,
+        ->{ default_billing },
+        class_name: 'Spree::UserAddress',
+        foreign_key: 'user_id',
+        inverse_of: false,
+        dependent: false
+      has_one :bill_address,
+        through: :default_user_bill_address,
+        source: :address,
+        inverse_of: false,
+        dependent: false
+
+      has_one :default_user_ship_address,
+        ->{ default_shipping },
+        class_name: 'Spree::UserAddress',
+        foreign_key: 'user_id',
+        inverse_of: false,
+        dependent: false
+      has_one :ship_address,
+        through: :default_user_ship_address,
+        source: :address,
+        inverse_of: false,
+        dependent: false
 
       accepts_nested_attributes_for :ship_address
       accepts_nested_attributes_for :bill_address

core/app/models/spree/user_address.rb

@@ -2,8 +2,8 @@
 
 module Spree
   class UserAddress < Spree::Base
-    belongs_to :user, class_name: UserClassHandle.new, foreign_key: "user_id", optional: true
-    belongs_to :address, class_name: "Spree::Address", optional: true
+    belongs_to :user, class_name: UserClassHandle.new, foreign_key: "user_id", inverse_of: :user_addresses
+    belongs_to :address, class_name: "Spree::Address"
 
     validates_uniqueness_of :address_id, scope: :user_id
     validates_uniqueness_of :user_id, conditions: -> { default_shipping }, message: :default_address_exists, if: :default?

core/db/migrate/20250530102541_add_addressbook_foreign_key.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class AddAddressbookForeignKey < ActiveRecord::Migration[7.0]
+  def change
+    add_foreign_key :spree_user_addresses, :spree_addresses, column: :address_id, null: false
+  end
+end