MongooseJS Notes

MongooseNotes.md

Connection to MongoDB

Connect to different MongoDB database depending on enviornment

# server.coffee
mongoose = require "mongoose"
app.configure "development", ->
	mongoose.connect "localhost", "app-dev"

Models

# Todo.coffee
mongoose = require "mongoose"
Schema = mongoose.Schema

todoSchema = mongoose.Schema
	name: String
	...

module.exports = mongoose.model "Todo", todoSchema

Don't need to put in connection.on "open", -> as Mongoose will buffer queries until connection is made

Relationships

TodoLists has many Todos:

# Todo.coffee
todoSchema = mongoose.Schema
	...
	list: { type: Schema.Types.ObjectId, ref: "TodoList" }

# TodoList.coffee
listSchema = mongoose.Schema
	name: String
	todos: [{ type: Schema.Types.ObjectId, ref: "Todo" }]

Usage:

# define a list
l1 = new TodoList
	name: "List 1"
# define child todos
t1 = new Todo 
	...
	list: l1._id # link to parent
t2 = new Todo 
	...
	list: l1._id
t3 = new Todo 
	...
	list: l1._id
# link from parent to children
l1.todos.push t1._id, t2._id, t3._id

Tip: save in parallel

# using async.js
async.parallel [
	(done) -> l1.save(done)
	(done) -> t1.save(done)
	(done) -> t2.save(done) 
	(done) -> t3.save(done)
	(done) -> t4.save(done)
], (err) -> ...