Javascript 连接单个数据单元中存在的多个json对象

Javascript 连接单个数据单元中存在的多个json对象,javascript,php,arrays,json,laravel-5.2,Javascript,Php,Arrays,Json,Laravel 5.2,我有一个列sayplaceditems,每次用户下订单时,都会存储一个json对象。因此,我能够成功显示第一个json对象(第一个订单)。它为第二个和第四个对象的foreach()提供了一个as无效参数` Collection {#207 ▼ #items: array:1 [▼ 0 => Order {#211 ▼ #casts: array:1 [▶] #fillable: array:8 [▶] #connection: null #table: null

我有一个列sayplaceditems,每次用户下订单时,都会存储一个json对象。因此,我能够成功显示第一个json对象(第一个订单)。它为第二个和第四个对象的foreach()提供了一个as无效参数`

Collection {#207 ▼
  #items: array:1 [▼
  0 => Order {#211 ▼
  #casts: array:1 [▶]
  #fillable: array:8 [▶]
  #connection: null
  #table: null
  #primaryKey: "id"
  #keyType: "int"
  #perPage: 15
  +incrementing: true
  +timestamps: true
  #attributes: array:10 [▶]
  #original: array:10 [▼
    "id" => 1
    "tableno" => "9"
    "noofitems" => 2
    "placeditems" => ""[{\"item\":\" Cafe Latte\",\"qty\":\"2\"}][{\"item\":\" Egg Sandwich\",\"qty\":\"3\"}]""
    "total" => 106
    "paidstatus" => 0
    "deliveredstatus" => 0
    "created_at" => "2017-07-14 11:32:29"
    "updated_at" => "2017-07-14 11:36:37"
    "username" => "harish"
  ]
  #relations: []
  #hidden: []
  #visible: []
  #appends: []
  #guarded: array:1 [▶]
  #dates: []
  #dateFormat: null
  #touches: []
  #observables: []
  #with: []
  #morphClass: null
  +exists: true
  +wasRecentlyCreated: false
    }
  ]
}
` 左视图叶片

 @foreach($orders as $order)
      @foreach(json_decode($order->placeditems, true) as $item)
      <p>
          {{ $item['item'] }}
          <span>
          ( {{ $item['qty'] }} )
          </span>
      </p>
      @endforeach
    @endforeach
@foreach($orders作为$order)
@foreach(json_解码($order->placeditems,true)为$item)

{{$item['item']}
({{$item['qty']}})

@endforeach @endforeach
如何更新第二个订单的字段?显示相关代码和数据结构。没有人会猜测为什么你的代码在看不到的时候会抛出错误。花些时间阅读和阅读