Problem with table data insertion via Aravel

Question

I have a project in Laravel at the same time I learn to use the framework, I need to insert a certain value in a table field, for this there is a condition I put in the controller:

public function setExpert()
{
    if($concessionaria->user_id = 0)
    {
        $concessionaria->expert = 0;
        $concessionaria->save();
    }
    else
    {
        $concessionaria->expert = 1;
        $concessionaria->save();
    }

The idea is to create a button where an expert can no longer be an expert at a dealership, for this I created a condition that if there is already an expert at a given dealership the value of a boolean field is set to 0(Not specialist, this when he presses this button) automatically, and if it does not exist will be set as 1 (when pressing the button), I do not know if it was clear, if necessary I explain again. This is the model with the data I need:

class ConcessionariaDelete extends Model
{
public $table = "concessionaria";

public $fillable = [
    'user_id',
    'expert',
    'nome',
    'expert_da_concessionaria',
    'slug',
    'tipo',
    'area',
    'cep',
    'endereco',
    'view_count',
    'status',
    'created_at',
    'updated_at'
];

These are the fields that need to be changed

What I did create was a model to manage the database table, and a controller connected to the model with the conditions to set whether or not it is expert, my problem being to perform the function, I just need to reload the page? Is it necessary to put it on some page to be executed? I didn’t understand correctly how to make changes to my controller’s conditions in my database.

Answer 1

Eloquent should not be identifying the primary key of the table.

class ConcessionariaDelete extends Model
{
 ...
 protected $primaryKey = "sua chave primária"
 ...

Answer 2

If an update follows an example:

public function setExpert($id)
{
   $concessionaria =  Model::find($id);
   if($concessionaria->expert === 0){
        $concessionaria->expert = 0;  
   }else{
     $concessionaria->expert = 1;
   }


   $concessionaria->save();

}