// 给model添加一个findByName方法 animalSchema.statics.findByName = function (name, cb) { //这里的this 指的就是Model return this.find({ name: new RegExp(name, 'i') }, cb); } var Animal = mongoose.model('Animal', animalSchema); Animal.findByName('fido', function (err, animals) ...
collection.distinct(field, castQuery, tick(callback)); return this; };update Casts the doc according to the model Schema and sends an update command to MongoDB. All paths passed that are not $atomic operations will become $set ops so we retain backwards compatibility. Example Model.update({...
Cant & Field, 2001) suggest that nonbreeding males will allocate a greater fraction of resources to survival and somatic repair compared to breeding females of the same age, with the consequence that females should undergo earlier or more rapid senescence than males. We are currently testing this...
// 给model添加一个findByName方法animalSchema.statics.findByName=function(name, cb) {//这里的this 指的就是Modelreturnthis.find({name:newRegExp(name,'i') }, cb); }varAnimal= mongoose.model('Animal', animalSchema);Animal.findByName('fido',function(err, animals) {console.log(animals); }...
Dwarf mongoose will break eggs by throwing them backwards through their legs at hard objects. They can spot both aerial and terrestrial predators by having a pupil which is horizontally elongated. This gives them an elongated field of vision. When there is a dispute over who should take over ...
Model.distinct(field, [conditions], [callback])//去重 Model.findOne(conditions, [fields], [options], [callback])//查找一条记录 Model.findOneAndRemove(conditions, [options], [callback])//查找一条记录并删除 Model.findOneAndUpdate([conditions], [update], [options], [callback])//查找一条记...
function getByConditions(){ var wherestr = {'username' : 'Tracy McGrady'}; var opt = {"username": 1 ,"_id": 0}; User.find(wherestr, opt, function(err, res){ if (err) { console.log("Error:" + err); } else { console.log("Res:" + res); ...
const mySchema = new Schema({ field: Number }, { strict: true }); const MyModel = mongoose.model('Test', mySchema); // Mongoose will filter out `notInSchema: 1` because `strict: true`, meaning this query will return // _all_ documents in the 'tests' collection MyModel.find({ ...
两个 Collection const mongoose = require('mongoose'); const { Schema } = mongoose; const chemListChemSchema...的 field 一定要记得保存成 ObjectID 的模式 populate() 对应的 ref field 如果一直返回 null 的话那么就很可能 schema 出错, 可能的错误原因: ref...field 不是 ObjectID 的类型, 保存的...
Model.find(conditions, [fields], [options], [callback]) var User = require("./user.js"); function getByConditions(){ var wherestr = {'username' : 'Tracy McGrady'}; User.find(wherestr, function(err, res){ if (err) { console.log("Error:" + err); } else { console.log("Res:...