permissions refactoring

app/Models/User.php

@@ -9,6 +9,7 @@ use Illuminate\Database\Eloquent\Attributes\Hidden;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Relations\BelongsToMany;
 use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\Relations\MorphMany;
 use Illuminate\Foundation\Auth\User as Authenticatable;
 use Illuminate\Notifications\Notifiable;
 use Laravel\Fortify\TwoFactorAuthenticatable;
@@ -20,6 +21,13 @@ class User extends Authenticatable
     /** @use HasFactory<UserFactory> */
     use HasFactory, Notifiable, TwoFactorAuthenticatable;
 
+    protected static function booted(): void
+    {
+        static::deleting(function (self $user): void {
+            $user->permissionAssignments()->delete();
+        });
+    }
+
     /**
      * Get the attributes that should be cast.
      *
@@ -29,12 +37,16 @@ class User extends Authenticatable
     {
         return [
             'email_verified_at' => 'datetime',
-            'is_admin' => 'boolean',
             'password' => 'hashed',
             'two_factor_confirmed_at' => 'datetime',
         ];
     }
 
+    public function permissionAssignments(): MorphMany
+    {
+        return $this->morphMany(PermissionAssignment::class, 'assignee');
+    }
+
     public function teams(): BelongsToMany
     {
         return $this->belongsToMany(Team::class)