Added soft deleting to Backend User Groups (#972)

Fixes #386. Related: wintercms/storm#156 PR

modules/backend/database/migrations/2023_09_09_000013_Db_Backend_Add_Users_Groups_Delete_At.php

@@ -0,0 +1,25 @@
+<?php
+
+use Winter\Storm\Database\Schema\Blueprint;
+use Winter\Storm\Database\Updates\Migration;
+
+class DbBackendAddUsersGroupsDeleteAt extends Migration
+{
+    public function up()
+    {
+        if (!Schema::hasColumn('backend_users_groups', 'deleted_at')) {
+            Schema::table('backend_users_groups', function (Blueprint $table) {
+                $table->timestamp('deleted_at')->nullable()->after('user_group_id');
+            });
+        }
+    }
+
+    public function down()
+    {
+        if (Schema::hasColumn('backend_users_groups', 'deleted_at')) {
+            Schema::table('backend_users_groups', function (Blueprint $table) {
+                $table->dropColumn('deleted_at');
+            });
+        }
+    }
+}

modules/backend/models/User.php

@@ -46,7 +46,7 @@ class User extends UserBase
      * Relations
      */
     public $belongsToMany = [
-        'groups' => [UserGroup::class, 'table' => 'backend_users_groups']
+        'groups' => [UserGroup::class, 'table' => 'backend_users_groups', 'softDelete' => true]
     ];
 
     public $belongsTo = [