RUBY ON RAILS ADVANCED

    // ASSOCIATIONS <
    Connect tables
    Models concerns > tablas de friends y users (o los nombres que les hayamos dado)

    class Friend < Application Record
     belongs_to :user
    end

    class User < Application Record
        #...other code
        has_many :friends
    end

    Create new field in friends table
    check db > schema.rb // you can see the columns of the tables

    #Add a column
    rails g migration add_user_id_to_friends user_id:integer:index    #add user id to the table friends
    rails db:migrate

    2:39
    <=% form.number_field :user_id, id: :friend_user_id class:"form-control", value: current_user.id, type: :hidden %>

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