revision: b890f60e0e1d6b57900eaafff5c5d77433e03504
  branch: 4.0.0-dev

require 'spec_helper'

class Book
  include       Mongoid::Document
  embeds_many   :pages

  def num_pages=(num)
    pages.destroy_all
    num.times() { pages.new }
  end
end

class Page
  include       Mongoid::Document
  embedded_in   :book
end


describe Book do
  it "should only ever have 3 pages" do
    # Create a book with 3 pages
    book = Book.create(num_pages: 3)
    expect(book).to have(3).pages               # Pass

    # Fetch the same book and give it
    # 3 new pages.
    same_book = Book.find(book.id)
    same_book.update_attributes(num_pages: 3)
    expect(same_book).to have(3).pages          # Pass

    # Fetch it one more time...
    expect(Book.find book.id).to have(3).pages  # Uh oh... 6 :\
  end
end

INSERT database=test collection=books documents=[{
  "_id"=>"5121d770e454a36825000001",
  "pages"=>[
    {"_id"=>"5121d770e454a36825000002"},
    {"_id"=>"5121d770e454a36825000003"},
    {"_id"=>"5121d770e454a36825000004"}
  ]
}] flags=[] (0.1688ms)


QUERY database=test collection=books selector={
  "_id"=>"5121d770e454a36825000001"
} flags=[] limit=0 skip=0 batch_size=nil fields=nil (0.7050ms)


UPDATE database=test collection=books selector={
  "_id"=>"5121d770e454a36825000001"
  }
  update={
    "$pushAll"=>{
      "pages"=>[
        {"_id"=>"5121d770e454a36825000005"},
        {"_id"=>"5121d770e454a36825000006"},
        {"_id"=>"5121d770e454a36825000007"}
      ]
    }
} flags=[] (0.1609ms)


QUERY  database=test collection=books selector={
  "_id"=>"5121d770e454a36825000001"
} flags=[] limit=0 skip=0 batch_size=nil fields=nil (0.4468ms)

book.pages.destroy_all if params[:book][:num_pages] # sucks
book.update_attributes(params[:book])