Node.js的MongoDB驱动Mongoose基本使用教程_node.js

npm install mongoose

var mongoose = require("mongoose"); var Schema = mongoose.Schema; var db = mongoose.connection; mongoose.connect('mongodb://localhost/animal'); db.on('error', console.error); db.once('open', function() { //这里建立模式和模型 }

//这里建立一个动物的模式，所有动物都拥有这个模式下的所有属性 var animalSchema = new Schema({ name: String, age: Number, });

var animalMode = db.model('Animal', animalSchema);

var cat = new animalMode({ name: 'catName', age: '7', //这里依然使用字符串，mongoose会自动转换类型 }); cat.save(function(err, thor) { if (err) return console.log(err); console.log(thor); }); //或者可以使用create //cat.create(function(err, thor) { // if (err) return console.log(err); // console.log(thor); //}); //执行查找 animalMode.find(function(err, people){ if(err) console.log(err); console.log(people); }); //查找符合条件数据 animalMode.findOne({title: 'catName'}, function(err, cat){ if(err) console.log(err); console.log(cat); });

var animalMode = mongoose.model('Animal', schema); var cat = new animalMode; cat.name = 'Statue of Liberty' //String cat.age = '7'; //Number cat.updated = new Date; //Date cat.binary = new Buffer(0); //Buffer cat.living = false; //Boolean cat.mixed = { any: { thing: 'i want' } }; //Mixed cat._someId = new mongoose.Types.ObjectId; //ObjectId cat.ofString.push("strings!"); //Array

var animalSchema = new Schema({any: {}}); var animalSchema = new Schema({any: {Schema.Types.Mixed}});

var animalSchema = new Schema({ name: String, age: Number, }); animalSchema.methods.findSimilarTypes = function (cb) { return this.model('Animal').find({ name: this.name }, cb); } var animalMode = db.model('Animal', animalSchema); cat.findSimilarTypes(function(err, cat){ if(err) console.log(err); console.log(cat); });

animalSchema.statics.findByName = function (name, cb) { return this.find({ name: new RegExp(name, 'i') }, cb); } var animalMode = db.model('Animal', animalSchema); animalMode.findByName('catName', function (err, animals) { console.log(animals); });

var animalSchema = new Schema({ name: String, age: Number, tags: { age: [String], index: true } // field level }); animalSchema.index({ name: 1, age: -1 }); // schema level

animalSchema.set('autoIndex', false); // or new Schema({..}, { autoIndex: false });

cat.save(function(err, thor) { if (err) return console.log(err); console.log(thor); }); //或者可以使用create cat.create(function(err, thor) { if (err) return console.log(err); console.log(thor); });

//find animalMode.find(function(err, cat){ if (err) console.log(err); console.log(cat); }) //findOne animalMode.findOne({name: 'catName'}, function(err, cat){ if (err) console.log(err); console.log(cat); }) //findByID //与 findOne 相同，但它接收文档的 _id 作为参数，返回单个文档。_id //可以是字符串或 ObjectId 对象。 animalMode.findById(id, function(err, adventure){ if (err) consoel.log(err); console.log(adventure); }); //where //查询数据类型是字符串时，可支持正则 animalMode.where('age', '2').exec(function(err, cat){ if (err) console.log(err); console.log(cat); }); animalMode .where('age').gte(1).lte(10) .where('name', 'catName') .exec(function(err, cat){ if (err) console.log(err); console.log(cat); });

animalMode.update({name: 'catName'}, {age: '6'}, {multi : true}, function(err, numberAffected, raw){ if (err) return console.log(err); console.log('The number of updated documents was %d', numberAffected); console.log('The raw response from Mongo was ', raw); });

animalMode.remove({age: 6}, function(err){ if (err) console.log(err); })

animalMode.count({age: 2}, function(err, cat){ if (err) console.log(err); console.log(cat); })