查询构建器在cakephp 3.2中获取数据

Question

我使用下面的代码来总结我所有的钱包余额.

$query = $this->Wallets->find();
$query->select([
    'count' => $query->func()->count('id'), 
    'total_price' => $query->func()->sum('amount')
])
->where(['status' => 4, 'user_id' => $user_id]);
pj($query);
echo $query->total_price;
exit;

出来的 pj($query);

[
    {
        "count": 2,
        "total_price": 700
    }
]

在这里,我试图使用下面的查询获得单个单独的价值

echo $query->total_price;

我没有得到它.什么是正确的语法,plz建议我.感谢名单.

Answer 1

添加first()到您的查询,请参阅手册

$query->select([
    'count' => $query->func()->count('id'), 
    'total_price' => $query->func()->sum('amount')
])
->where(['status' => 4, 'user_id' => $user_id]);

$wallet = $query->first();

debug($wallet);

debug($wallet->total_price);