Laravel使用MrShan0\PHPFirestore时FirestoreDocument对象调用报错问询

解决方案 #

你使用的MrShan0\PHPFirestore\FirestoreDocument类封装了公开的字段读取方法，无需直接访问私有属性，以下两种写法都可以正常获取字段值： #

方案1：直接调用get()方法读取单个字段

这是最推荐的写法，直接指定字段名即可获取对应值：

foreach ($collection['documents'] as $user) {
    $age = [
        "name" => $user->get('data1'),
        "gender" => $user->get('data3'),
        "martial" => $user->get('data4'),
        "education" => $user->get('data5'),
        "home" => $user->get('data6'),
        "phone" => $user->get('data14'),
        "date" => $user->get('data15'),
        "record" => $user->get('data71'),
        "status" => $user->get('data75'),
        "totalpoint" => $user->get('data73'),
        "monitorypoint" => $user->get('data74')
    ];
    $data[] = $age;               
}

方案2：先转为关联数组再访问

如果需要批量读取多个字段，可以先调用toArray()方法将整个文档对象转为普通关联数组，之后就可以用数组语法访问：

foreach ($collection['documents'] as $user) {
    $userData = $user->toArray();
    $age = [
        "name" => $userData['data1'],
        "gender" => $userData['data3'],
        "martial" => $userData['data4'],
        "education" => $userData['data5'],
        "home" => $userData['data6'],
        "phone" => $userData['data14'],
        "date" => $userData['data15'],
        "record" => $userData['data71'],
        "status" => $userData['data75'],
        "totalpoint" => $userData['data73'],
        "monitorypoint" => $userData['data74']
    ];
    $data[] = $age;               
}

报错原因说明 #

1. 第一个报错Cannot use object of type MrShan0\PHPFirestore\FirestoreDocument as array是因为遍历得到的$user是对象实例，不是数组，不能用$user['键名']的语法取值。
2. 第二个报错Cannot access private property MrShan0\PHPFirestore\FirestoreDocument::$fields是因为$fields是类的私有属性，仅允许类内部访问，外部必须通过类提供的公开方法读取数据。

内容的提问来源于stack exchange，提问作者amanuel dessie