Has_many + habtm on same model

Rails
1

Hello,

In a situation where a user has_many :groups (it owns the group) but
also
has_and_belongs_to_many :groups, how is this most easily represented?

The only way i have found is

user.rb:
has_many :groups
has_and_belongs_to_many :memberships, ,:join_table => ‘memberships’,
:class => ‘group’

group.rb
belongs_to :user
has_and_belongs_to_many :memberships, , :join_table => ‘memerships’,
:class => ‘user’

I think there is an opportunity to have a new model membership.rb that
belongs_to :user, belongs_to :group where a user has_many :groups,
:through
=> :membership but not 100% sure.

What is the cleanest approach here?

Adam

2

unknown wrote:

Hello,

In a situation where a user has_many :groups (it owns the group) but
also
has_and_belongs_to_many :groups, how is this most easily represented?

The only way i have found is

user.rb:
has_many :groups
has_and_belongs_to_many :memberships, ,:join_table => ‘memberships’,
:class => ‘group’

group.rb
belongs_to :user
has_and_belongs_to_many :memberships, , :join_table => ‘memerships’,
:class => ‘user’

I think there is an opportunity to have a new model membership.rb that
belongs_to :user, belongs_to :group where a user has_many :groups,
:through
=> :membership but not 100% sure.

What is the cleanest approach here?

User:
has_many :owned_groups, :class_name => “Group”
has_many :memberships, :dependent_destroy
has_many :groups, :through => :memberships

Group:
belongs_to :owner, :class_name => “User”
has_many :memberships, :dependent_destroy
has_many :users, :through => :memberships

That’s how I’d do it. You want to keep the association names distinct
(and meaningful too).

–
Josh S.
http://blog.hasmanythrough.com