Laravel updateExistingPivot Keeps Returning false - laravel

Question

I have the following with many to many relationship and pivot table. So I would like to update the user_id to 1 pivot table where trophy_id = 3 . However it keeps returning 0 or false.
Trophy.php
public function users()
{
return $this->belongsToMany('App\User', 'trophies_users', 'trophy_id', 'user_id');
}
User.php
public function trophies()
{
return $this->belongsToMany('App\Trophy', 'trophies_users', 'user_id', 'trophy_id');
}
Pivot Table
public function up()
{
Schema::create('trophies_users', function (Blueprint $table) {
$table->id();
$table->integer('trophy_id');
$table->integer('user_id');
$table->timestamps();
});
}
In My controller , I am trying to update the pivot's table
UserController#index
public function index(Request $request)
{
$user = User::find(1);
$trophyId = 3;
$attributes = ['user_id' => 1];
$res = $user->trophies()->updateExistingPivot($trophyId , $attributes);
dd($res); //Keeps returning 0 or false
}

Answer 1

You are passing attribute to updateExistingPivot which is for updating extra attribute on a pivot table.
For example, assume we want to store a color for each companion of user and trophy, we can achieve that by adding an extra column in pivot table and saving color data on it as below:
|---------------------|
| column |
|---------------------|
| id |
|---------------------|
| user_id |
|---------------------|
| trophy_id |
|---------------------|
| color |
|---------------------|
If you want to update a relationship on pivot table, use sync method.
$user=User::find(1);
$trophies_id=[1, 2, 3];
$user->trophies()->sync($trophies_id);