在laravel中将对象转换为数组

2022-01-13 00:00:00 arrays object type-conversion php laravel

我查询了这样的数据库，得到了一个数组:

i queried a DB like this which got me an array:

foreach($oid as $orderid) {
    $orderdetailData[] = DB::table('order_details')
        ->join('orders', 'order_details.oid', '=', 'orders.oid')
        ->select('order_details.oid', 'orders.ostatus')
        ->where('order_details.oid', $orderid)->get();
    }

    $data = array_flatten($orderdetailData);
    return $data;

这是我得到的数组

array (size=2)
  0 => 
    object(stdClass)[174]
      public 'oid' => int 1
      public 'ostatus' => string 'Placed' (length=6)
  1 => 
    object(stdClass)[158]
      public 'oid' => int 2
      public 'ostatus' => string 'Placed' (length=6)

我正在尝试以表格形式获取此数组

I am trying to get this array in the form

array (size=2)
  0 => 
    array (size=2)
      public 'oid' => int 1
      public 'ostatus' => string 'Placed' (length=6)
  1 => 
    array (size=2)
      public 'oid' => int 2
      public 'ostatus' => string 'Placed' (length=6)

我试过这样做:

foreach($orderdetailData as $key => $value){
    $data[] = array_flatten($orderdetailData[$key]);
}

但是这样做会得到一个这种形式的数组:

But doing this gets me an array in this form: 

array (size=2)
  0 => 
    array (size=1)
      0 => 
        object(stdClass)[174]
          public 'oid' => int 1
          public 'ostatus' => string 'Placed' (length=6)
  1 => 
    array (size=1)
      0 => 
        object(stdClass)[158]
          public 'oid' => int 2
          public 'ostatus' => string 'Placed' (length=6)

这不是我想要的.有人能告诉我这样做的简单方法是什么吗?谢谢

Which is not i what i am looking for. Can someone tell me what would be an easy way to do this ? Thanks

推荐答案

使用 array_map 并强制转换为数组就足够了:

Using array_map and casting to an array should be sufficient:

$data = array_map(function($object){
    return (array) $object;
}, $data);

我也不会在循环中运行查询.您应该尝试从数据库的一个查询中获取该数据.像这样的东西可以工作:

I also wouldn't run queries inside a loop. You should try getting that data in one query from the db. Something like this could work:

$data = DB::table('order_details')
    ->join('orders', 'order_details.oid', '=', 'orders.oid')
    ->select('order_details.oid', 'orders.ostatus')
    ->whereIn('order_details.oid', $oid)->get();

编辑

正如在另一个答案中提到的那样，让我解释一下如何通过将 PDO 设置为 FETCH_ASSOC 来完成同样的任务:

DB::setFetchMode(PDO::FETCH_ASSOC);
$data = DB::table('order_details') .... ->get();

但是，这会更改请求其余部分的全局获取模式(至少在您不打开新连接的情况下).为了保存，您应该在之后将其更改回来:

However this changes the fetch mode globally for the rest of the request (at least if you don't open a new connection). To be save you should change it back afterwards:

DB::setFetchMode(PDO::FETCH_ASSOC);
$data = DB::table('order_details') .... ->get();
DB::setFetchMode(PDO::FETCH_CLASS);

如果您不确定使用的是什么默认值，甚至可以先备份它:

Or even back it up first if you can't be sure what default is used:

$fetchModeBefore = DB::getFetchMode();
DB::setFetchMode(PDO::FETCH_ASSOC);
$data = DB::table('order_details') .... ->get();
DB::setFetchMode($fetchModeBefore);

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