在mongo插入期间插入数组

Question

如何进行以下操作？插入操作是否可行（不要求更新）？

var items = db.items.find({});
var bulkShopInsert = db.shop.initializeUnorderedBulkOp();

bulkShopInsert.insert({
 'shopName' : 'My shop',
 'items' : items <- here is what I would like to achieve
});