rails association belongs_to -

rails association belongs_to -

i know sty must wrong in way build db please take min answering : building supermarket model, 1 user has shopping list, each list has many products. :

class user < activerecord::base has_many :lists end class list < activerecord::base belongs_to :user has_many :products end class product < activerecord::base ???? end

a list has several products products don't belong lists. should have users having many lists, , lists having many products ? regards,

have class links them via has_many through.

class listitem < activerecord::base belongs_to :list belongs_to :product end class list < activerecord::base belongs_to :user has_many :list_items has_many :products, through: :list_items end

ruby-on-rails associations belongs-to