Error when using select2 to limit user to one role - is this even possible?

[emogeekface]

Bug report

There doesn't seem to be a way to limit users to one role each.

What I did:

I have created my own UserCrudController.php and Roles Model and have changed the checklist_dependency fields for roles and permissions within the addUserFields function to:

[  // Select2
  'label'     => trans('backpack::permissionmanager.roles'),
  'type'      => 'select2',
  'name'      => 'roles', // the db column for the foreign key
  'entity'    => 'roles', // the method that defines the relationship in your Model
  'model'     => \App\Models\Role::class, // foreign key model
  'attribute' => 'name', // foreign key attribute that is shown to user
  'default'   => 1, // set the default value of the select2
],
[
  'label'          => mb_ucfirst(trans('backpack::permissionmanager.permission_plural')),
  'type'           => 'checklist',
  'name'           => 'permissions', // the method that defines the relationship in your Model
  'entity'         => 'permissions', // the method that defines the relationship in your Model
  'attribute'      => 'name', // foreign key attribute that is shown to user
  'model'          => config('permission.models.permission'), // foreign key model
  'pivot'          => true, // on create&update, do you need to add/delete pivot table entries?]
  'number_columns' => 3, //can be 1,2,3,4,6
]

What I expected to happen:

I expect to be able to select one role for a user using the select2 dropdown, and successfully create and save the user.

What happened:

I receive the error: array_values(): Argument #1 ($array) must be of type array, int given from the line return $this->traitStore(); in the store() function.

What I've already tried to fix it:

This appears to be because roles is being passed across as an integer, and not an array.

I have tried to find out whether this is a backpack or spatie issue and have a feeling it might be due to spatie permissions stating that user has a BelongsToMany relationship with roles, however, I can't figure out how to override that.

Backpack, Laravel, PHP, DB version:

Backpack v5 Laravel v9

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[tabacitu]

Hey @emogeekface ,

Indeed, this package assumes one user can have multiple roles. If that's not what you want, feel free to customize the UserCrudController to match your needs. But keep in mind users & permissions are both set using ONE field, checklist_dependency, which connects two sets of checkboxes.

If you want a select and a set of checkboxes, you can do that, but it won't be plug-and-play, you have to code it yourself. There are Backpack components that can help, though:

• the select field (or perhaps the radio field)
• the CrudField JS Library

I'm going to close this issue, as it's not really a bug - it's a custom feature that we don't plan on supporting.

Hope it helps. Cheers!