mongoseデータベースまとめ

var mongoose = require('mongoose')
var mongodb = 'mongodb://localhost/root/data/db'

mongoose.Promise = global.Promise
var db = mongoose.connect(mongodb);


// model
var BookSchema = new mongoose.Schema({
    name: String,
    author: String,
    newTime: Date
})
// model
mongoose.model('Book', BookSchema)
//-------------------------------------------------------------------


// model
var Book = mongoose.model("Book")

// 
var book = new Book({
    name: "MEAN Web Development",
    author: "liang",
    newTime: new Date()
})

book.save(function(err){
    console.log('save status:', err ? 'failed' : 'success')
})

Book.find({},function(err,data){
    if(err){
        console.log(err)
        return
    }
    console.log(data)
    console.log("find  success")
})

Book.findOne({author:"liang"},function(err, data){
    if(err){
        console.log(err)
        return
    }
    console.log(data)
})
// ID 
Book.findOne({author:"liang"},function(err, data){
    if(err){
        console.log(err)
        return
    }
    if(data){
        data.remove()
    }

    console.log(data)
})


//  or   and 
var cond = {
    $or:[
        {author: 'Jane'},
        {author: 'lin'}
    ]
}

Book.find(cond, function(err,data){
    if(err){
        console.log(err)
        return
    }
    console.log(data)
})