Laravel 5.1 - 组合来自输入的数组

Question

我有一个创建 3 个数组的订单：

产品 ID
数量
行总计（数量 x 产品价格）

我在产品和销售之间有一个名为 Product_Sale 的枢轴 table，它还具有列数量和 line_total。

我努力工作的第一件事是将所有三个数组组合成一个合理的单个数组。以下是我目前拥有的：

    $keys = $request->product_id;
    $quantities = $request->quantity;
    $line_totals = $request->line_total;

    $order = array();

    foreach ($keys as $key => $id) {
            $order[$key] = array(
                'quantity'  => $quantities[$id],
                'line_total' => $line_totals[$id]
            );
    }

    print_r ($order);

我在这里得到一个错误：未定义的偏移量：53

非常感谢任何帮助 - 谢谢！

===更新：

var_dump 个数组：

PRODUCT IDS
array (size=51)
  10 => string '10' (length=2)
  5 => string '5' (length=1)
  53 => string '53' (length=2)
  15 => string '15' (length=2)
  19 => string '19' (length=2)
  39 => string '39' (length=2)
  27 => string '27' (length=2)
  29 => string '29' (length=2)
  48 => string '48' (length=2)
  30 => string '30' (length=2)
  23 => string '23' (length=2)
  43 => string '43' (length=2)
  16 => string '16' (length=2)
  14 => string '14' (length=2)
  36 => string '36' (length=2)
  51 => string '51' (length=2)
  8 => string '8' (length=1)
  25 => string '25' (length=2)
  28 => string '28' (length=2)
  24 => string '24' (length=2)
  22 => string '22' (length=2)
  38 => string '38' (length=2)
  26 => string '26' (length=2)
  49 => string '49' (length=2)
  41 => string '41' (length=2)
  12 => string '12' (length=2)
  31 => string '31' (length=2)
  20 => string '20' (length=2)
  4 => string '4' (length=1)
  6 => string '6' (length=1)
  17 => string '17' (length=2)
  47 => string '47' (length=2)
  44 => string '44' (length=2)
  50 => string '50' (length=2)
  34 => string '34' (length=2)
  7 => string '7' (length=1)
  35 => string '35' (length=2)
  46 => string '46' (length=2)
  40 => string '40' (length=2)
  11 => string '11' (length=2)
  33 => string '33' (length=2)
  21 => string '21' (length=2)
  45 => string '45' (length=2)
  18 => string '18' (length=2)
  42 => string '42' (length=2)
  52 => string '52' (length=2)
  37 => string '37' (length=2)
  32 => string '32' (length=2)
  3 => string '3' (length=1)
  9 => string '9' (length=1)
  13 => string '13' (length=2)

QUANTITIES
array (size=51)
  0 => string '0' (length=1)
  1 => string '0' (length=1)
  2 => string '0' (length=1)
  3 => string '0' (length=1)
  4 => string '0' (length=1)
  5 => string '0' (length=1)
  6 => string '0' (length=1)
  7 => string '0' (length=1)
  8 => string '0' (length=1)
  9 => string '2' (length=1)
  10 => string '2' (length=1)
  11 => string '0' (length=1)
  12 => string '0' (length=1)
  13 => string '0' (length=1)
  14 => string '0' (length=1)
  15 => string '0' (length=1)
  16 => string '0' (length=1)
  17 => string '0' (length=1)
  18 => string '0' (length=1)
  19 => string '0' (length=1)
  20 => string '0' (length=1)
  21 => string '0' (length=1)
  22 => string '0' (length=1)
  23 => string '0' (length=1)
  24 => string '0' (length=1)
  25 => string '0' (length=1)
  26 => string '0' (length=1)
  27 => string '0' (length=1)
  28 => string '0' (length=1)
  29 => string '0' (length=1)
  30 => string '0' (length=1)
  31 => string '0' (length=1)
  32 => string '0' (length=1)
  33 => string '0' (length=1)
  34 => string '0' (length=1)
  35 => string '0' (length=1)
  36 => string '0' (length=1)
  37 => string '0' (length=1)
  38 => string '0' (length=1)
  39 => string '0' (length=1)
  40 => string '0' (length=1)
  41 => string '0' (length=1)
  42 => string '0' (length=1)
  43 => string '0' (length=1)
  44 => string '0' (length=1)
  45 => string '0' (length=1)
  46 => string '0' (length=1)
  47 => string '0' (length=1)
  48 => string '1' (length=1)
  49 => string '0' (length=1)
  50 => string '0' (length=1)

LINE TOTALS
array (size=51)
  0 => string '0.00' (length=4)
  1 => string '0.00' (length=4)
  2 => string '0.00' (length=4)
  3 => string '0.00' (length=4)
  4 => string '0.00' (length=4)
  5 => string '0.00' (length=4)
  6 => string '0.00' (length=4)
  7 => string '0.00' (length=4)
  8 => string '0.00' (length=4)
  9 => string '38.00' (length=5)
  10 => string '42.00' (length=5)
  11 => string '0.00' (length=4)
  12 => string '0.00' (length=4)
  13 => string '0.00' (length=4)
  14 => string '0.00' (length=4)
  15 => string '0.00' (length=4)
  16 => string '0.00' (length=4)
  17 => string '0.00' (length=4)
  18 => string '0.00' (length=4)
  19 => string '0.00' (length=4)
  20 => string '0.00' (length=4)
  21 => string '0.00' (length=4)
  22 => string '0.00' (length=4)
  23 => string '0.00' (length=4)
  24 => string '0.00' (length=4)
  25 => string '0.00' (length=4)
  26 => string '0.00' (length=4)
  27 => string '0.00' (length=4)
  28 => string '0.00' (length=4)
  29 => string '0.00' (length=4)
  30 => string '0.00' (length=4)
  31 => string '0.00' (length=4)
  32 => string '0.00' (length=4)
  33 => string '0.00' (length=4)
  34 => string '0.00' (length=4)
  35 => string '0.00' (length=4)
  36 => string '0.00' (length=4)
  37 => string '0.00' (length=4)
  38 => string '0.00' (length=4)
  39 => string '0.00' (length=4)
  40 => string '0.00' (length=4)
  41 => string '0.00' (length=4)
  42 => string '0.00' (length=4)
  43 => string '0.00' (length=4)
  44 => string '0.00' (length=4)
  45 => string '0.00' (length=4)
  46 => string '0.00' (length=4)
  47 => string '0.00' (length=4)
  48 => string '11.00' (length=5)
  49 => string '0.00' (length=4)
  50 => string '0.00' (length=4)

Answer 1

必须检查数量或行总计中是否存在产品 ID

$keys = $request->product_id;
$quantities = $request->quantity;
$line_totals = $request->line_total;

$order = array();

foreach ($keys as $key => $id) {
   if( in_array($key,$quantities)  && in_array($key,$line_totals) ) {

        $order[$key] = array(
            'quantity'  => $quantities[$key],
            'line_total' => $line_totals[$key]
        );
   }
}

print_r ($order);

Answer 2

好的，我注意到你代码中的一些东西..

首先，产品 ID 数组包含每个项目的匹配键值。这表明 $key 和 $id 出自同一来源并且是同一件事。在这种情况下，您可以放弃 foreach 中的键值。保存一些代码并使其更清晰。也尽量使用好的变量名； $request->product_id 是单数，但它 returns 是多个数组。更好的叫它$request->product_ids； $order = array();.

也是如此

此外，我发现产品 ID 数组没有其他两个数组中列出的所有键。在这种情况下，如果找不到该密钥，您的代码总是会崩溃。最好在为变量赋值之前进行一些检查。

这里有一个保存赋值的方法：

$keys        = $request->product_id;
$quantities  = $request->quantity;
$line_totals = $request->line_total;

$orders = [];

foreach($keys as $key => $id) 
{
    // do we have all the data?
    if( !isset($quantities[ $id ]) || !isset($line_totals[ $id ]) )
    { // nopes.
        // log error or someting about missing key..

        continue; // skip this 'bad' one and try the next.
    }

    // we have all the data, save the order.
    $orders[ $key ] = [
        'quantity'   => $quantities[ $id ],
        'line_total' => $line_totals[ $id ]
    ];
}

希望对您有所帮助！

Laravel 5.1 - 组合来自输入的数组

Laravel 5.1 - Combining arrays from input

php

arrays

laravel

eloquent

laravel-5.1