database design - Rails complex association: has_and_belongs_to_many from two classes to one -

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in application, have user model , artist model. both users , artists should able "follow" multiple artists. i'm not sure how describe relationship, , i'm lost regarding underlying migration.

i've tried having has_and_belongs_to_many :artists in both classes, , additional has_and_belongs_to_many :users in artist, seems messy, , don't know how write migration.

i've looked @ association docs migration; i'm not sure if simpler have third-class , use :through association, or if need 1 user-to-artist , artist-to-artist, or if 1 additional class enough.

help appreciated, in advance!


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