gistfile1.rb

require 'mongo_mapper'
require 'spec'

MongoMapper.connection = Mongo::Connection.new('localhost')
MongoMapper.database = 'tmp'

class Cast
  include MongoMapper::EmbeddedDocument
  key :person, Integer
  key :name, String
end

class Movie
  include MongoMapper::Document
  key :name, String
  many :casts
end

describe 'Movie' do
  before :each do
    Movie.collection.clear
    movie = Movie.create(:name => 'Support Your Local Gunfighter')
    movie.casts << Cast.new(:name => 'James Garner', :person => 16896)
    movie.casts << Cast.new(:name => 'Suzanne Pleshette', :person => 8231)
    movie.casts << Cast.new(:name => 'Jack Elam', :person => 4965)
    movie.casts << Cast.new(:name => 'Harry Morgan', :person => 4073)
    movie.save
  end
  
  it "should delete embedded documents" do
    movie = Movie.all(:conditions => {:name => /Support Your Local/}).first
    movie.should_not be_nil
    movie.casts.size.should == 4
    movie.casts.delete_if{|cast| cast.person == 4965}
    movie.save
    movie.casts.size.should == 3
  end
end