导出mongoose数据库模块 [英] Exporting a mongoose database module
问题描述
我需要导出我的mongoose数据库模块,所以我可以使用我程序中每个模块的定义模型。
I need to export my mongoose database module, so I could use my defined models from every module in my program.
例如,我的database.js模块看起来类似的东西:
For example, my database.js module looks something like that:
var mongoose = require('mongoose'),
db = mongoose.createConnection('mongodb://localhost/newdb'),
Schema = mongoose.Schema;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', function callback () {
console.log("Connected to database newdb");
var dynamicUserItemSchema = new mongoose.Schema({
userID: Number,
rank: Number,
});
var staticUserItemSchema = new mongoose.Schema({
_id: Schema.Types.Mixed,
type: Schema.Types.Mixed,
});
var DynamicUserItem = db.model('DynamicUserItem', dynamicUserItemSchema);
var StaticUserItem = db.model('StaticUserItem', staticUserItemSchema);
});
我希望能够添加 var db = require('../ my_modules / database');
到我的程序的任何其他模块 - 所以我将能够使用这样的模型:
I want to be able adding var db = require('../my_modules/database');
to any other module my program - so I will be able to use the models like that:
db.DynamicUserItem.find();
或 item = new db.DynamicUserItem({});
是否有可能使用出口或模块出口来做到这一点?谢谢。
Is it possible doing that using "exports" or "module exports" ? Thanks.
推荐答案
我通常不使用错误
和打开
事件并按照 mongoosejs 中的示例创建与我的连接D b。使用该示例,您可以执行以下操作。
I usually don't use the error
and open
events and follow the example from mongoosejs to create a connection to my db. Using the example you could do the following.
db.js
var mongoose = require('mongoose');
var db = mongoose.createConnection('localhost', 'test');
var schema = mongoose.Schema({ name: 'string' });
var Cat = db.model('Cat', schema);
module.exports = Cat; // this is what you want
然后在你的app.js中你可以做类似
and then in your app.js you can do something like
var Cat = require('db');
var peter = new Cat();
希望有所帮助!
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