メモ

var mongoose=require("mongoose");
mongoose.connect('mongodb://localhost/my_database');

var Comment=new Schema({
  name:{type:String,default:"hahaha"},//default 
  age:{type:Number},
  sex:{type:String},
  buff:Buffer
});

var monModel=db.model("user",Comment);

var content={name:" ",age:18,sex:" "};
var monInsert=new monModel(content);
monInsert.save(function(err){
  if(err){
    console.log(err); 
  }else{
    console.log(" ");
  }
  db.close();
});

var content={};// 
var field={name:" "};// 
monModel.find(content,fied,function(err,result){
  if(err){
    console.log(err); 
  }else{
    console.log(" ");
  }
  db.close();
})

var tiaojian={name:" "};
var gengxi={$set:{name:" "}};
monModel.find(tiaojian,gengxi,funtion(err){
  if(err){
    console.log(err); 
  }else{
    console.log(" ");
  }
  db.close();
})

var tiaojian={name:" "};
monModel.remove(tiaojian,function(err){
  if(err){
    console.log(err); 
  }else{
    console.log(" ");
  }
  db.close();
})