Rails, how to setup a one to many relationship?
I have the following models:
User (id, name, network_id) Network(id, title)
What kind of Rails model assoc do I need to add so that I can do:
so network has_may users and user belongs_to network.
Just add a network_id to users table if you still haven't and also since it's a foreign_key is worth indexing it.
rails generate migration AddNetworkIdToUsers
class AddNetworkIdToUsers < ActiveRecord::Migration def change add_column :users, :network_id, :integer add_index :users, :network_id end end
In the network model do
class Network < ActiveRecord::Base has_many :users
in the user model:
class User < ActiveRecord::Base belongs_to :network
According to your database-setup, you just have to add the following lines to your models:
class User < ActiveRecord::Base belongs_to :network # Rest of your code here end class Network < ActiveRecord::Base has_many :users # Rest of your code here end
In case you have a setup without network_id, you should go with daniels answer.