如何将项目推送到laravel查询中的数组？

Question

我有几个查询正在运行，我需要能够将项目推入数组，然后将数组项目分配到该对象的更新查询中。下面是功能，我认为背后的理念应该是：

"offer_when”: [ 
    { 
     “when”: “later”, 
     "offer_end_time": "19:00", 
     "offer_start_time": "17:00"  
    }, 
    { 
     “when”: “tomorrow”, 
     "offer_end_time": "18:00", 
     "offer_start_time": "17:00"  
    } 
] 

的想法是，更新offer_when对象时，我们不只是添加一个我们添加多达我们可以基于这样的特定条件如：

• 如果报价一天是明天
• 如果报价一天开始时间晚于当前时间 等

到目前为止，我CA n运行查询并将其添加到offer_when对象字段中，但它只添加一个值而不是多个值，这是我所需要的。

功能到目前为止是在foreach循环，我做的所有查询像这样的下面：

public function getOffers(Offer $offer) 
{ 

    $mytime = Carbon::now('Europe/London'); 
    $currentTime = $mytime->format('H:i'); 
    $today = $mytime->format('m/d/Y'); 
    $day = $mytime->format('l'); 
    $tomorrow = Carbon::now()->addDay(1)->format('l'); 
    $thisDay = strtolower($day); 

    DB::table('offers')->update(['current_time' => $currentTime]); 
    DB::table('offers')->update(['current_date' => $today]); 
    DB::table('offers')->update(['current_day' => $thisDay]); 

    foreach(Offer::all() as $offerObject){ 
     $when = $offerObject['offer_when']; 
     $the_days = $offerObject['days']; 
     $featured = $offerObject['current_date']; 
     $featured_date = $offerObject['featured_date']; 
     $start_time = $offerObject['offer_start_time']; 
     $current_time = $offerObject['current_time']; 
     $end_time = $offerObject['offer_end_time']; 
     $whens = array(); 

     $whenDataTomorow = 
      [ 
       array(
       'when' => 'tomorrow', 
       'start_time' => $start_time, 
       'end_time' => $end_time 
      ) 
      ]; 
     $whenDataNow = 
      [ 
       array(
       'when' => 'now', 
       'start_time' => $start_time, 
       'end_time' => $end_time 
      ) 
      ]; 
     $whenDataLater = 
       [ 
       array(
       'when' => 'later', 
       'start_time' => $start_time, 
       'end_time' => $end_time 
      ) 
      ]; 

     $isTomorrow = json_encode($whenDataTomorow); 
     $isNow = json_encode($whenDataNow); 
     $isLater = json_encode($whenDataLater); 

     $offerObject::where('days', 'LIKE', '%' . strtolower($tomorrow) . '%') 
       ->update(['offer_when' => $isTomorrow]); 

     $offerObject::where('days', 'LIKE', '%' . $thisDay . '%') 
       ->where('current_time', '>', $start_time) 
       ->update(['offer_when' => $isNow]); 

     $offerObject::where('days', 'LIKE', '%' . $thisDay . '%') 
       ->where('offer_start_time', '>', $current_time) 
       ->update(['offer_when' => $isLater]); 

     $offerObject::whereBetween('offer_start_time', array('07:00','12:00')) 
       ->update(['types' => 'breakfast']); 
     $offerObject::whereBetween('offer_start_time', array('11:00','14:00')) 
       ->update(['types' => 'lunch']); 
     $offerObject::whereBetween('offer_start_time', array('14:00','21:00')) 
       ->update(['types' => 'dinner']); 

      $offersAll = $offerObject 
       ::where('days', 'LIKE', '%' . $thisDay . '%') 
       ->orWhere('days', 'LIKE', '%' . strtolower($tomorrow) . '%') 
       ->orWhere('featured_date', 'LIKE', '%' . $featured . '%') 
       ->get(); 

     return $offersAll; 

    } 

} 

上述作品查询和我得到的输出的东西，它似乎拿起正确值，但我需要这个工作的基础上，一些优惠属于相同的查询事实。这是一个提供输出：

"offer_when": [ 
{ 
"when": "now", 
"start_time": "08:50", 
"end_time": "08:50" 
} 
], 

但是这个对象字段应该有2个对象，但我不能做到这一点，我希望它成为的方式查询权。任何人都可以将我指向正确的方向吗？

Answer 1

当您使用$model->update()，它覆盖当前值。所以你永远不会得到多个孩子。

首先，不要使用json_encode()存储阵列。使用attribute casting。

class Offer extends Model { 
    // ... 

    protected $casts = [ 
     'offer_when' => 'array', 
    ]; 

    // ... 
} 

现在你可以把$offer->offer_when当成一个数组。请注意，您不能直接修改属性值，如$offer->offer_when[0] = 1，这是不可能的，系统会抛出异常。您必须获取当前值，操作并分配回该属性。

$offerWhen = $offer->offer_when; 

// Add 
$offerWhen[] = [ 
    'when' => 'now', 
    'start_time' => $start_time, 
    'end_time' => $end_time, 
]; 

// Remove 
unset($offerWhen[0]); 

// Finish? Assign back to the attribute 
$offer->offer_when = $offerWhen; 
$offer->save(); 
// Or this also works 
$offer->update(['offer_when' => $offerWhen]); 

我建议使用您的when场为方便访问和操作的关键。

// Add 
$offerWhen['now'] = [ 
    'when' => 'now', 
    'start_time' => $start_time, 
    'end_time' => $end_time, 
]; 

// Remove 
unset($offerWhen['now']);