流星更新多个嵌套数组元素

Question

let items = [
     {
         name: "Choco",
         id: "12344",
         qty: 24,
         status: "open"
     },
     {
         name: "Mils",
         id: "12346",
         qty: 5,
         status: "open"
     },
     {
         name: "boom",
         id: "12345",
         qty: 10,
         status: "open"
     }
 ];

Given the array above, is it possible to update the document without calling a forEach on each of them.

For instance what i am currently doing is this

  _.each(items, function( item ) {
Orders.update({_id: doc.orderId, "items.id": item.id},
                   {
                     "$set": {
                       'items.$.status': item.status,
                       'items.$.qty': item.qty,
                     }
                   })
})

is it possible to just update the entire array at once without create a new mongo db transaction

Answer 1

You can read all the order:

 var order = Orders.findOne({_id: doc.orderId});

Than adjust order.items with the new data and then update in a single operation:

Orders.update({_id: doc.orderId },{"$set": {items:order.items}});