exports = mongoose = require('mongoose')
Creates a variable named moongoose and sets it equal to require('mongoose') .
mongoose.connect(config.db.uri)
Starts a connection to the database.
exports = Schema = mongoose.Schema
This makes the module export require('mongoose').Schema for any reason.
This could simply be written as:
var mongoose = require('mongoose') mongoose.connect(config.db.uri) exports = Schema = mongoose.Schema
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