Nodejs模块导出使用情况

Question

In a sample application I saw a module with a code like this:

exports = mongoose = require('mongoose')
mongoose.connect(config.db.uri)
exports = Schema = mongoose.Schema

Can someone explain what the above code means? After these three lines I can see that mongoose and Schema functions can be called from anywhere in the application but I can't get the logic behind this.

Answer 1

exports = mongoose = require('mongoose')

This creates a variable called moongoose and sets it to be equal to require('mongoose') .

mongoose.connect(config.db.uri)

This starts a connection with a database.

exports = Schema = mongoose.Schema

This makes the module export require('mongoose').Schema for whatever reason.

This could be more simply written as:

var mongoose = require('mongoose')
mongoose.connect(config.db.uri)
exports = Schema = mongoose.Schema