讓我舉個例子，假設我的收藏是這樣的，
products = [
{
id: 1,
name: "a",
offer: true,
expiryDate: "23-03-2022"
},
{
id: 2,
name: "b",
offer: false,//no offer
},
{
id: 3,
name: "c",
offer: true,
expiryDate: "01-01-2021"//already expired
},
{
id: 4,
name: "d",
offer: true,
expiryDate: "01-06-2022"
},
]
我想在這里，提供的專案按降序排列，它不應該過期，然后剩余的專案應該按降序排列，所以結果會是這樣的
[
{
id: 4,
name: "d",
offer: true,
expiryDate: "01-06-2022"
},
{
id: 1,
name: "a",
offer: true,
expiryDate: "23-03-2022"
},
{
id: 3,
name: "c",
offer: true,
expiryDate: "01-01-2021"
},
{
id: 2,
name: "b",
offer: false,
},
]
uj5u.com熱心網友回復：
db.collection.aggregate([
{
"$match": {}
},
{
"$set": {
"offer": {
"$cond": {
"if": {
"$lt": [
{
"$toDate": "$expiryDate"
},
"$$NOW"
]
},
"then": false,
"else": true
}
},
"expiryDate": {
"$toDate": "$expiryDate"
}
}
},
{
"$sort": {
"expiryDate": -1,
"offer": -1
}
}
])
mongoplayground
轉載請註明出處，本文鏈接：https://www.uj5u.com/net/433617.html
標籤：javascript 节点.js 数据库 mongodb 走