function() { this.$locals.start = Date.now();});schema.post('save', function() { console.log('Saved in', Date.now() - this.$locals.start, 'ms');});const Person = mongoose.model('Person', schema);const doc = ne
一般来说,mongoose是通过回调函数来进行增删改查的,如下列save所示: product.sold = Date.now(); product.save(function (err, product) { if (err) .. }) 如果不加回调函数,就会返回一个promise。 product.save().then(function(product) { ... }); 对于其它一些返回query的操作来说,不加回调函数,...
参考示例,用save方法为集合“test1”添加一条数据(包含属性name、age、email),并console输出返回值? varTestEntity=newTestModel({name:"jerry",age:28,email:"jerry@qq.com"});TestEntity.save(function(error,doc){console.log(doc);}); Model的create方法保存MongoDB数据 update更新MongoDB数据...
const{username,password,type} =req.body //判断用户是否存在,如果存在,返回提示错误的信息,如果不存在,保存 //查询(根据username) UserModel.findOne({username},function(err,user){ //如果user有值(已存在 ) if(user){ res.send({code:1,msg:'此用户已存在'}) }else{ //保存 new UserModel({username,...
mongoose-unique-validator is a plugin which adds pre-save validation for unique fields within a Mongoose schema. - mongoose-unique-validator/mongoose-unique-validator
for循环可以把字符串里面的元素都依次取出来，自动赋值给变量i然后再执行循环体内的代码块对于Spark SQL的...
数据是一种资产，将面临损坏、删除甚至存储介质退化的风险。组织必须采取措施消除这些风险以维护数据完整性...
Mongoose: ^6.1.1 MongoDB: Docker image: mongo:4.2 constmongoose=require('mongoose');letpairSchema=newmongoose.Schema({ask:Number,bid:Number,last:Number,code:String},{versionKey:false});constmodel=mongoose.model('pairs',pairSchema);asyncfunctiontest(){awaitmongoose.connect('mongodb://localhost:27...
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a分批发货英文 Delivers goods in turn English [translate] aCustomer doe not requirements stereo and mono function 顾客母鹿要求立体声和不是单音作用 [translate] a按照颜色收取,不分尺寸,订单中的三种颜色一起收900元染色费用。 According to the color collection, does not divide the size, in the order ...