Laravel self based polymorphic relationship - laravel

Question

I have 3 tables:
categories
admins
users
Category can create users and admins. In categories table I have morphs field:
$table->nullableMorphs('userable');
And relations in Category model:
public function userable()
{
return $this->morphTo();
}
public function user()
{
return $this->morphOne(self::class, 'userable');
}
But when I tried do like this:
$category = Category::first();
$user = User::first();
$category->user()->save($user);
Get error with message:
Illuminate\Database\QueryException with message 'SQLSTATE[42S22]:
Column not found: 1054 Unknown column 'userable_id' in 'field list'
(SQL: update users set userable_id = 1, userable_type =
App\Models\Category, users.updated_at = 2021-04-27 12:13:22 where
id = 1)'
How I can correctly create self morph relationship in laravel?

Answer 1

So I think that what you should be doing is adding to the User model and the Admin model the relation user you've added to the category, those models that have this relationship can be morphed into the category
class User {
...
public function user() {
return $this->morphOne(Category::class, 'userable');
}
...
}
class Admin {
...
public function user() {
return $this->morphOne(Category::class, 'userable');
}
...
}
so you can do your logic this way
$category = Category::first();
$user = User::first();
$user->user()->save($category);
and it will update you category record with userable_type beeing App\Models\User and userable_id beeing 1 or whatever the user id is
id
name
userable_type
userable_id
1
Category Test
App\Models\User
1
to make things easier you can create a trait and add that relationship to the trait
trait IsUserable {
public function user() {
return $this->morphOne(Category::class, 'userable');
}
}
and instead of adding the relationship to User and Admin model, you just use the trait instead
class User {
use IsUserable;
}
class Admin {
use IsUserable;
}