1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
| // db.js
const MongoClient = require('mongodb').MongoClient;
const dburl = "mongodb://localhost:27017";
const dbCollectionName = 'yyy'
const dbName = "xxx"
// 连接数据库
let dbo = null
async function dbconnect(){
const db = await MongoClient.connect(dburl, {
useNewUrlParser: true,
useUnifiedTopology: true
})
dbo = db.db(dbName);
}
// 查找数据
async function find(cod){
const dbData = await dbo
.collection(dbCollectionName)
.find({
// 查询条件
...cod
}).toArray();
console.log(dbData)
}
// 获取最新索引下标
async getNextSequence() {
const res = await dbo.collection(dbCollectionName).findOneAndUpdate(
{
increase: 1,
},
{
$inc: {
id: 1,
},
$set: {
des: "This line record total num",
},
},
{
upsert: true,
new: true,
// "returnOriginal": false
}
);
return res.value ? res.value.id : 0;
}
// 插入
async function inset(){
dbo.collection(dbCollectionName).insertOne({
id: getNextSequence() + 1,
// 其他需要插入的数据
});
}
// 更新
async function update(){
const recordItem = await find({...})
await dbo.collection(dbCollectionName).updateOne({
_id: recordItem._id
}, {
$set: {
// 需更新数据
}
});
}
|