请求投资投资文件 Mongoose

###



Trying to query nested embedded documents using Mongoose.



Database Outline for example



An Owner has multiple bookshelves which each have an array of books.

A book is not unique, and the same book could be on many different shelves.



###



mongoose = require/"mongoose"/

Schema = mongoose.Schema

mongoose.connect "localhost", "d1"



bookSchema = new Schema/title: String/

Book = mongoose.model/"Book", bookSchema/



shelfBookSchema = new Schema/

 book:

 type: Schema.ObjectId

 ref: "Book"

 /



shelfSchema = new Schema/

 name: String

 books: [ shelfBookSchema ]

 /



Shelf = mongoose.model/"Shelf", shelfSchema/



ownerSchema = new Schema/

 firstName: String

 shelves: [ shelfSchema ]

 /



Owner = mongoose.model/"Owner", ownerSchema/



mongoose.connection.on "open", ->

 book1 = new Book/title:"How to make stuff"/

 book1.save /err/ ->

 throw err if err



 owner = new Owner/firstName:"John"/

 shelf = new Shelf/name:"DIY Shelf"/

 shelf.books.push

 _id: book1._id

 book: book1._id

 owner.shelves.push shelf

 owner.save /err/ ->

 throw err if err



 #Let's find one owner and get all of his bookshelves and the books they containa

 Owner.findOne//.populate/"shelves.books.book"/.exec /err, owner/ ->

 console.error owner.shelves[0].books



 ### Log shows:



 { book: 4fe3047401fc23e79c000003,

 _id: 4fe3047401fc23e79c000003 }]



 Great but how do I get the values of book like the title etc??



 ###



 mongoose.connection.db.dropDatabase ->

 mongoose.connection.close//