问透视表中具有列的Laravel多对多

EN

public function privates()
{
    return $this->belongsToMany('App\Private')->withPivot('amount');
}

public function workers()
{
    return $this->belongsToMany('App\Worker')->withPivot('amount');
}

$private = Private::create();
$worker = Worker::create();
$amount = 1000;
$private->workers()->attach($worker->id, ['amount' => '$amount']);
                                            ^^^-column in your payment table.

public function privates()
{
    return $this->belongsToMany(Private::class, 'payments', 'worker_id', 'private_id')
        ->withPivot('amount');
}

public function workers()
{
    return $this->belongsToMany(Worker::class, 'payments', 'worker_id', 'private_id')
        ->withPivot('amount');
}

$privates = $worker->privates;
// this '$privates' contains the 'pivot' table values which contains the 'amount'.

// first $private and $worker need to have saved.
// and then attach particular $worker as below.
$private->attach($worker_id, ['amount' => 1200.00]);