我正在尝试在嵌套的嵌入式文档中进行查询。我试图“填充”结果,但失败了。
如何在 find 调用中取回所有书籍详细信息?我想要用户架子上的所有书籍对象,我可以从中获取数据?
###
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()