Debug session

(rdb:1) query.conditions
(book = #<Book @id=1 @name="Harry Potter">)

(rdb:1) query.conditions.first.subject
#<DataMapper::Associations::ManyToOne::Relationship:0x00000101152528 
@required=true, 
@key=false, 
@child_model=BookTag, 
@child_model_name="BookTag", 
@parent_model_name="Book", 
@name=:book, 
@instance_variable_name="@book", 
@options={:min=>1, :max=>1, :child_repository_name=>:default, :parent_repository_name=>nil},
@child_repository_name=:default, 
@parent_repository_name=nil, @min=1, @max=1, @reader_visibility=:public, @writer_visibility=:public, @default=nil,
@query={}, 
@parent_model=Book, 
@parent_key=[#<DataMapper::Property::Serial @model=Book @name=:id>], 
@child_key=[#<DataMapper::Property::Integer @model=BookTag @name=:book_id>]>

(rdb:1) query.conditions.first.value
#<Book @id=1 @name="Harry Potter">

gistfile2.rb

class Book
  include DataMapper::Resource

  property :id,   Serial
  property :name, String, :index => true

  has n, :book_tags
  has n, :tags, :through => :book_tags
end

class Tag
  include DataMapper::Resource

  property :id,   Serial
  property :name, String

  has n, :book_tags
  has n, :books, :through => :book_tags
end

class BookTag
  include DataMapper::Resource

  property :id,   Serial

  belongs_to :book
  belongs_to :tag
end


@b = Book.create(:name => "Harry Potter")
@t = Tag.create(:name => "fiction")
@t2 = Tag.create(:name => "wizards")

@b.tags << @t
@b.tags << @t2
@b.save


debugger # this is where I get the above output
@b.tags