我有一行，其中包含以下数据:
{
"_id" : ObjectId("5bcef76b0c9a4c194cf6d0a7"),
"userid" : ObjectId("5bc5ae4355418805b8caabb3"),
"transactionid" : "ch_1DON67EzCa9AoDtY51kialzs",
"adminid" : [
"5b5af339bc69c511816e8a2f",
"5b87948d97b752099c086708"
],
"amount" : 3220,
"ispaid" : true,
"products" : [
{
"productid" : ObjectId("5bceba35003c87043997a1d4"),
"quantity" : 2,
"price" : 200,
"type" : "product",
"isCanceled" : false,
"isDeliverd" : false,
"createdby" : "schooladmin",
"userid" : ObjectId("5b87948d97b752099c086708"),
"isReadyToPickup" : false,
"name" : "The Second Product",
"description" : " "
},
{
"productid" : ObjectId("5bc5b2df55418805b8caabbd"),
"quantity" : 2,
"price" : 100,
"type" : "product",
"isCanceled" : false,
"isDeliverd" : false,
"createdby" : "superadmin",
"userid" : ObjectId("5b5af339bc69c511816e8a2f")
},
{
"productid" : ObjectId("5bc5bc5fe84c3d028aaa269c"),
"quantity" : 2,
"price" : 100,
"type" : "product",
"isCanceled" : false,
"isDeliverd" : false,
"createdby" : "superadmin",
"userid" : ObjectId("5b5af339bc69c511816e8a2f")
}
],
"paymentUsing" : "card",
"cardBrand" : "Visa",
"country" : "US",
"paymentDate" : "2018-10-23T10:26:51.856Z"
}
我想对产品对象的所有元素执行搜索。如果其中任何一个匹配，则整个对象将存储在数组变量中。
假设，我尝试从 name 对象中搜索 The Second Product 字符串 产品数组。那么它就会给我所有元素。喜欢
[
{
"productid" : ObjectId("5bceba35003c87043997a1d4"),
"quantity" : 2,
"price" : 200,
"type" : "product",
"isCanceled" : false,
"isDeliverd" : false,
"createdby" : "schooladmin",
"userid" : ObjectId("5b87948d97b752099c086708"),
"isReadyToPickup" : false,
"name" : "The Second Product",
"description" : " "
}
]
如果找到两个或多个元素，那么它将相应地返回它的数组。
请给我建议解决方案。 先感谢您。 :)
最佳答案
类似这样的事情:
db.collection.find({products: {$elemMatch: {name:'The Second Product'}}})
关于node.js - 如何从mongodb中的对象数组中获取特定的数组元素，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/52949486/