Rails has_and_belongs_to_many migration

Question

I have two models restaurant and user that I want to perform a has_and_belongs_to_many relationship.

I have already gone into the model fil

Answer 1

For HABTM relationships, you need to create a join table. There is only join table and that table should not have an id column. Try this migration.

def self.up
  create_table :restaurants_users, :id => false do |t|
    t.integer :restaurant_id
    t.integer :user_id
  end
end

def self.down
  drop_table :restaurants_users
end

You must check this relationship rails guide tutorials