如何將項目推送到laravel查詢中的數組？

Question

我有幾個查詢正在運行，我需要能夠將項目推入數組，然後將數組項目分配到該對象的更新查詢中。下面是功能，我認爲背後的理念應該是：

"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對象時，我們不只是添加一個我們添加多達我們可以基於這樣的特定條件如：

• 如果報價一天是明天
• 如果報價一天開始時間晚於當前時間 等

到目前爲止，我CA n運行查詢並將其添加到offer_when對象字段中，但它只添加一個值而不是多個值，這是我所需要的。

功能到目前爲止是在foreach循環，我做的所有查詢像這樣的下面：

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; 

    } 

} 

上述作品查詢和我得到的輸出的東西，它似乎拿起正確值，但我需要這個工作的基礎上，一些優惠屬於相同的查詢事實。這是一個提供輸出：

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

但是這個對象字段應該有2個對象，但我不能做到這一點，我希望它成爲的方式查詢權。任何人都可以將我指向正確的方向嗎？

Answer 1

當您使用$model->update()，它覆蓋當前值。所以你永遠不會得到多個孩子。

首先，不要使用json_encode()存儲陣列。使用attribute casting。

class Offer extends Model { 
    // ... 

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

    // ... 
} 

現在你可以把$offer->offer_when當成一個數組。請注意，您不能直接修改屬性值，如$offer->offer_when[0] = 1，這是不可能的，系統會拋出異常。您必須獲取當前值，操作並分配回該屬性。

$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]); 

我建議使用您的when場爲方便訪問和操作的關鍵。

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

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