Relationships and Deleting

Rails
1

I am playing around with relationships at the moment and am hitting a
wall.

I have a group.

class Group < ActiveRecord::Base
has_many :contacts
end

and a contact.

class Contact < ActiveRecord::Base
belongs_to :group
end

If I destroy group it doesn’t destroy contacts in the group.

Am I missing something obvious?

Thanks!

2

To delete contacts when the group is deleted:

has_many :contacts, :dependent => :destroy

or if you don’t use callbacks (before_destroy, after_destroy) in
Contact,
this is faster:

has_many :contacts, :dependent => :delete_all

3

Thanks lx Quic!

Very informative.