Yii2 设置场景不起作用

Question

我想为我的休息应用程序使用场景添加额外的字段。这就是我所做的

控制器动作

$model =(new Job(['scenario' => Job::SCENARIO_MORE]))->findOne(['id'=>$id]);
if ($model){
    return $model;
}

型号代码

const SCENARIO_LESS = 'index';
const SCENARIO_MORE = 'view';

public function scenarios()
{
    return [
        self::SCENARIO_LESS => ['field1', 'field2'],
        self::SCENARIO_MORE => ['field1', 'field2', 'field3'],
    ];
}

但它仍然返回默认字段，没有任何想法发生变化？

Answer 1

我认为场景仅用于在将数据插入表之前验证数据

场景特征主要用于验证和海量属性分配。但是，您可以将其用于其他目的。例如，您可以根据当前场景声明不同的属性标签。

但是如果你想要特定的字段，你应该在模型中使用fields 方法：

// explicitly list every field, best used when you want to make sure the changes
// in your DB table or model attributes do not cause your field changes (to keep API backward compatibility).
public function fields()
{
    return [
        // field name is the same as the attribute name
        'id',

        // field name is "email", the corresponding attribute name is "email_address"
        'email' => 'email_address',

        // field name is "name", its value is defined by a PHP callback
        'name' => function () {
            return $this->first_name . ' ' . $this->last_name;
        },
    ];
}

// filter out some fields, best used when you want to inherit the parent implementation
// and blacklist some sensitive fields.
public function fields()
{
    $fields = parent::fields();

    // remove fields that contain sensitive information
    unset($fields['auth_key'], $fields['password_hash'], $fields['password_reset_token']);

    return $fields;
}

见：http://www.yiiframework.com/doc-2.0/guide-structure-models.html#fields