rails 3 - FactoryGirl create associated records - ruby-on-rails-3

Question

I am trying to create some test data to fill my tables with so that i can test functionality on my site.
The tables in question are: songs, song_arrangements, and song_arrangement_files. The are associated in this way.
Songs:
has_many :song_arrangements, :dependent => :destroy
has_many :song_arrangement_files, :through => :song_arrangements
Song Arrangements:
belongs_to :song
has_many :song_arrangement_files, :dependent => :destroy
Song Arrangement Files:
belongs_to :song
belongs_to :song_arrangement
I have been able to create 25 songs with FactoryGirl with this code:
Code in my spec file:
before { FactoryGirl.create_list(:song, 25) }
Code in the factory:
FactoryGirl.define do
factory :song do |s|
s.sequence(:title) { |n| "Song Title #{n}" }
s.sequence(:artist) { |n| "Song Artist #{n}" }
end
end
Any thoughts on how to create song_arrangements and song_arrangement_files that are correctly assciated with their respective song_arrangement or song record?
I'm guessing i could use after(:create) nested in my factory somehow. I'm very new to FactoryGirl and still fairly new to Rails in general. Any help is much appreciated!

Answer 1

So my other answer helped me do what i needed to do; however, i was needing to basically go one level of associations deeper and i was hitting walls with that solution. I ended re-reading the FactoryGirl documentation for associations and came up with this solution that works in all my cases. It creates songs, song_arrangements, and song_arrangement_files. I'm sure the code isn't pretty, but it works and can be improved upon later. Hope this helps anyone running into the same type of roadblocks.
FactoryGirl.define do
factory :song do |s|
s.sequence(:title) { |n| "Song Title #{n}" }
s.sequence(:artist) { |n| "Song Artist #{n}" }
factory :song_with_song_arrangements do
ignore do
song_arrangements_count 100
end
after(:create) do |song, evaluator|
FactoryGirl.create_list(:song_arrangement, evaluator.song_arrangements_count, song: song)
end
end
end
factory :song_arrangement do |sa|
song
sa.sequence(:title) { |n| "Arrangement #{n}" }
original_key 'A'
bpm 75
sa.sequence(:chart_content) { |n| "This is the chart content for Arrangement #{n}." }
chart_mapping 'V1, C, V2, C, B, C, C'
sa.sequence(:notes) { |n| "These are notes for the Arrangement #{n}." }
factory :song_arrangement_with_song_arrangement_files do
ignore do
song_arrangement_files_count 100
end
after(:create) do |song_arrangement, evaluator|
FactoryGirl.create_list(:song_arrangement_file, evaluator.song_arrangement_files_count, song_arrangement: song_arrangement)
end
end
end
factory :song_arrangement_file do |saf|
song_arrangement
song
saf.sequence(:title) { |n| "Attachment #{n}" }
url 'http://www.google.com'
saf.sequence(:description) { |n| "This is the description of Attachment #{n}." }
end
end
Code used to call these factories:
Songs:
before(:each) { FactoryGirl.create_list(:song, 25) }
Song Arrangements:
before(:each) { FactoryGirl.create(:song_with_song_arrangements) }
Song Arrangement Files:
before(:each) { FactoryGirl.create(:song_arrangement_with_song_arrangement_files) }

Answer 2

For anyone else running in to this issue, here's the solution i came up with. As i said, i am new to FactoryGirl so if there's a better way to do this please share!
FactoryGirl.define do
factory :song do |s|
s.sequence(:title) { |n| "Song Title #{n}" }
s.sequence(:artist) { |n| "Song Artist #{n}" }
before(:create) do |song|
song.song_arrangements << FactoryGirl.build_list(:song_arrangement, 10)
end
end
factory :song_arrangement do |sa|
sa.sequence(:title) { |n| "Arrangement #{n}" }
original_key 'A'
bpm 75
sa.sequence(:chart_content) { |n| "This is the chart content for Arrangement #{n}." }
chart_mapping 'V1, C, V2, C, B, C, C'
sa.sequence(:notes) { |n| "These are notes for the Arrangement #{n}." }
end
end
Giving credit where credit is due, i actually found the answer after a lot of searching from this post: How to user factory girl to create associated lists with a has_many with a validation that requires it on create
It was Blizzo's answer that i pulled the solution from.