Cakephp3查询包含返回0结果

Question

这是我的查询：

$query = $appointments->find();
$query->where(['Appointments.id =' => '786']);
$query->order(['date' => 'ASC']);

这会返回1个结果。现在，当我想要与另一个属于＆＃39;属于＆＃39;表我使用此查询：

$query = $appointments->find();
$query->select(['Appointments.id', 'Appointments.start', 'Clients.name', 'Services.Name']);
$query->where(['Appointments.id =' => '786']);
$query->contain(['Clients', 'Users', 'Services']);
$query->order(['date' => 'ASC']);

这会返回0结果，我做错了吗？

这是我的AppointmentsTable.php：

 public function initialize(array $config)
{
    parent::initialize($config);

    $this->table('appointments');
    $this->displayField('id');
    $this->primaryKey('id');

    $this->belongsTo('Users', [
        'foreignKey' => 'user_id',
        'joinType' => 'INNER'
    ]);
    $this->belongsTo('Clients', [
        'foreignKey' => 'client_id',
        'joinType' => 'INNER'
    ]);
    $this->belongsTo('Services', [
        'foreignKey' => 'service_id'
    ]);
}