Rails ActiveRecord How to make foreign key in second table? -

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simple question: how can make 'rateable_id' foreign key bboys table?

db schema:

activerecord::schema.define(version: 20140331112614)    create_table "bboys", force: true |t|     t.string   "name"     t.string   "crew"     t.string   "country"     t.datetime "created_at"     t.datetime "updated_at"     t.string   "avatar_file_name"     t.string   "avatar_content_type"     t.integer  "avatar_file_size"     t.datetime "avatar_updated_at"   end    create_table "rates", force: true |t|     t.integer  "rater_id"     t.integer  "rateable_id"     t.string   "rateable_type"     t.float    "stars",         null: false     t.string   "dimension"     t.datetime "created_at"     t.datetime "updated_at"   end

thank you!

check gem foreigner, can you. don't know want. try write more description question.


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