nodejs 使用mongoose 操作mongodb
nodejs操作mongodb可以使用mongoose：
MongooseisaMongoDBobjectmodelingtooldesignedtoworkinanasynchronousenvironment.
安装mongoose：
npminstallmongoose
///获取mongodb连接
varconn=mongoose.connect('mongodb://localhost/mytest');
varSchema=mongoose.Schema
,ObjectId=Schema.ObjectId;
varPerson=newSchema({
title:{type:String}
,age:{type:Number,min:5,max:20}
,meta:{
likes:[String]
,birth:{type:Date}
}
});
varp=mongoose.model('ModelName22',Person);
varBlog=mongoose.model("ModelName22");
//保存新纪录
varblog1=newBlog();
blog1.id22=4;
blog1.title="ully";
blog1.save(function(err){
if(err){
console.log('savefailed');
}
console.log('savesuccess');
});
///查找记录
Blog.find({_id:'4f8678891256c4b819000002'},function(err,docs){
console.log(docs);
});
//修改记录
varconditions={name:'borne'}
,update={$set:{title:'xxxxb'}}
,options={};
Blog.update({_id:'4f866f35311977a81b000001'},update,options,function(err,docs){
console.log(docs+","+err);
});
//删除记录
Blog.remove({_id:'4f8678891256c4b819000002'},function(err,docs){
console.log(docs);
});