nodeJS 操作 mongodb 增删改查

config.js

module.exports={
dbName_test:"test",//测试数据库表
logUrl:'logs/dbErr.log',//错误日志
}

timeFormat.js

let date=new Date();
let Y=date.getFullYear();
let m=date.getMonth()+1;
let d=date.getDate();
let h=date.getHours();
let M=date.getMinutes();
let s=date.getSeconds();
module.exports=Y+"-"+(m>9 ? m : '0'+m)+"-"+(d>9 ? d :'0'+d)+" "+(h>9? h:'0'+h)+":"+(M>9? M:'0'+M)+":"+(s>9?s:'0'+s)+'\n';

db.js

const mongodb=require('mongodb');
const logs=require('./log');
const timeFormat=require('./timeFormat');
const MongoClient = require('mongodb').MongoClient;
const config=require('./../config/index');
// Connection URL
const url = 'mongodb://root:root123@localhost:27017';

const logUrl=config.logUrl;

//连接数据库
const db=function (dbName) {
new Promise(function (resolve,reject) {
// Use connect method to connect to the server
MongoClient.connect(url, function(err, client) {
if(err){
logs(logUrl,timeFormat+'数据库连接失败\n');
return false
}
const db = client.db(dbName);
resolve(db);
});
});
};

//插入一条数据
exports.insertOne=function(dbName,collection,json) {
return new Promise(function (resolve,reject) {
//插入之前先查询
find(collection,json).then(function (data) {
if(data.length===0){
db(dbName).then(function (db) {
db.collection(collection).insertOne(json,function (err,res) {
if(err){
logs(logUrl,timeFormat+'数据插入失败'+err+'\n');
return false
}
resolve(res);
});
})
}else {
resolve('已存在，请勿重复添加')
}
});
})
};

//插入多条数据
exports.insertMany=function (dbName,collection,Arr) {
return new Promise(function (resolve, reject) {
db(dbName).then(function (db) {
db.collection(collection).insertMany(Arr,function (err,res) {
if(err){
logs(logUrl,timeFormat+'数据插入失败'+err+'\n');
return false
}
resolve(res);
})
})
})
};

//查询数据
function find(dbName,collection,whereStr={}) {
return new Promise(function (resolve, reject) {
db(dbName).then(function (db) {
db.collection(collection).find(whereStr).toArray(function (err,res) {
if(err){
logs(logUrl,timeFormat+'数据查询失败'+err+'\n');
return false
}
resolve(res);
});
})
})
}
exports.find=find;

//更新一条数据
exports.updateOne=function (dbName,collection,whereStr, updateStr) {
return new Promise(function (resolve,reject) {
db(dbName).then(function (db) {
db.collection(collection).updateOne(whereStr,{$set: updateStr},function (err,res) {
if(err){
logs(logUrl,timeFormat+'数据更新失败'+err+'\n');
resolve('数据更新失败');
return false
}
resolve(res);
})
})
})
};

//更新多条数据
exports.updateMany=function (dbName,collection,whereStr,updateStr) {
return new Promise(function (resolve,reject) {
db(dbName).then(function (db) {
db.collection(collection).updateMany(whereStr,{$set:updateStr},function (err,res) {
if(err){
logs(logUrl,timeFormat+'批量更新数据失败'+err+'\n');
resolve('批量更新数据失败');
return false
}
resolve(res)
});
})
})
};

//删除一条数据
exports.deleteOne=function (dbName,collection,whereStr) {
return new Promise(function (resolve, reject) {
db(dbName).then(function (db) {
db.collection(collection).deleteOne(whereStr,function (err,res) {
if(err){
logs(logUrl,timeFormat+'数据删除失败'+err+'\n');
resolve('数据删除失败');
return false
}
resolve(res);
})
})
})
}

//删除多条数据
exports.deleteMany=function (dbName,collection,whereStr) {
return new Promise(function (resolve, reject) {
db(dbName).then(function (db) {
db.collection(collection).deleteMany(whereStr,function (err, res) {
if(err){
logs(logUrl,timeFormat+'批量删除数据失败'+err+'\n');
resolve('批量删除数据失败');
return false
}
})
});
})
}

app.js 调用

const db=require('./untils/db');
const dbName = config.dbName_test;

//插入一条数据
db.insertOne('haha',{"name":"this is haha"}).then(function (data) {
console.log(data)
})

//查找数据
db.find(dbName,'haha').then(function (data) {
console.log(data)
});

//插入多条数据
db.insertMany(dbName,'haha',[
{"name":"this is haha"},
{"name1":"this is haha 1"},
{"name2":"this is haha 2"},
]).then(function (data) {
console.log(data)
})

//更新多条数据
db.updateMany(dbName,'haha',{"name":"改成中文的了"},{'name':"change english"}).then(function (data) {
console.log(data)
})

//删除多条数据
db.deleteMany(dbName,'haha',{name:"change english"}).then(function (data) {
console.log(data)
})

nodeJS 操作 mongodb 增删改查

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