Question

我正在尝试使用mongoose js程序来执行插入操作，但是我想使用1,2,3,4等作为ID不要使用为我自动创建的BSON ObjectID。

var mongoose = require('mongoose');

var dbHost = 'mongodb://localhost:27017/mong_db';

//var newID = mongoose.model('bookSchema', { _id: Number, name: String });

 mongoose.connect(dbHost);

 //Create a schema for Book

  var bookSchema = mongoose.Schema({

  _ id: Number, 

  name: String,

  //Also creating index on field isbn

  isbn: {type: String, index: true},

  author: String,

   pages: Number

  });

>Updated 


var book1 = new Book({

 _id = 1
name:"Mongoose Demo 1",

isbn: "MNG123",

author: "Author1,  Author2",

pages: 123

});

Answer 1

您可以在调用模型构造函数时指定模式中使用的类型。

var Cat = mongoose.model('Cat', { _id: Number, name: String });

然后在存储对象时传入_id字段。

var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/test-mongo-id');

var Cat = mongoose.model('Cat', { _id: Number, name: String });

var kitty = new Cat({ _id: 1, name: 'Zildjian' });
kitty.save(function (err) {
  console.log(err || 'meow');
  Cat.findOne({_id: 1}, function (err, cat) {
    console.log(err || 'Cat:', cat)
  });
});

输出：

meow
Cat: { _id: 1, name: 'Zildjian', __v: 0 }

您的架构应该包含_id: Number，如下所示：

var bookSchema = mongoose.Schema({
  _id: Number,    // <-- You're missing this
  name: String,    
  //Also creating index on field isbn    
  isbn: {type: String, index: true},    
  author: String,    
  pages: Number    
});

如何在Mongoose中将_id从ObjectID更改为Number

1 个答案: