在蛋糕php中的非对象上调用成员函数find（）

Question

我收到错误

  

致命错误：在非对象上调用成员函数find（）

当我添加以下代码时。虽然其余的工作除了sale_channel，当我尝试与其他人一样时，然后得到此错误。

public function beforeFilter() {
        parent::beforeFilter();

        $zones = $this->{$this->modelClass}->Zone->find("list", [
            'conditions' => ['is_active' => 1],
            'order' => ['name' => 'ASC']
        ]);
        $states = $this->{$this->modelClass}->State->find("list", [
            'conditions' => ['is_active' => 1],
            'order' => ['name' => 'ASC']
        ]);
        $cities = $this->{$this->modelClass}->City->find("list", [
            'conditions' => ['is_active' => 1],
            'order' => ['name' => 'ASC']
        ]);
        $sale_channel = $this->{$this->modelClass}->SaleChannel->find("list", [
            'conditions' => ['is_active' => 1],
            'order' => ['name' => 'ASC']
        ]);
        //$sale_channel = $this->SaleChannel->find("list", array('conditions' => array('is_active' => 1)));
        $this->set(compact('zones', 'states', 'cities', 'sale_channel'));
    }

型号代码

class SaleChannel extends AppModel {

/**
 * Associations
 */
var $hasMany = array(
    'Outlets' => array(
        'className' => 'Outlet',
        'foreignKey' => 'outlet_id',
        'type' => 'INNER'
    )
);
public $validate = array(
    'name' => array(
        'notEmpty' => array('rule' => array('notEmpty'), 'message' => 'This field is required.',
        ),
    )
    );

}