Rails fixtures :has_many and :belongs_to

How do I create sample data in my .yml for has_many and belongs_to variables.

This is a sample adding these files into a simple rails new lab command in the terminal. I don't really know how to explain this in english. But I hope my code shows enough detail to get the point across.

man.rb

class Man < ActiveRecord::Base
  attr_accessible :name
  has_many :items
end

item.rb

class Item < ActiveRecord::Base
  attr_accessible :name
  belongs_to :man
end

men.yml

one:
  name: ManOne
  #items: one, two

two:
  name: ManTwo
  #items: one, two

items.yml

one:
  name: ItemOne

two:
  name: ItemTwo

man_test.rb

require 'test_helper'

class ManTest < ActiveSupport::TestCase
  def test_man
    Man.all.each do |man|
      puts man.name.to_s + ": " + man.items.to_s
    end
    assert true
  end
end

Have a look to fixtures docs, you can do something like:

men.yml

man_one:
  name: ManOne

man_two:
  name: ManTwo

items.yml

item_one:
  name: ItemOne
  man: man_one

item_two:
  name: ItemTwo
  man: man_one

item_three:
  name: ItemThree
  man: man_two

Update

It seems you don't have the man_id in the table column. You should create a migration to do so:

rails g migration AddManIdToItem man_id:integer

and run the migration: bundle exec rake db:migrate