You are correct, Jeff, setting the author using the create method on a
has_many works:
test "something" do
a1 = Author.create! :name => 'author 1'
b = a1.books.create! :title => 'rails'
a2 = Author.create! :name => 'author 2'
b.update_attributes! :author_id => a2.id
assert_equal a2.id, b.author_id
end
And so does setting the author via the foreign key:
test "something" do
a1 = Author.create! :name => 'author 1'
b = Book.create! :title => 'rails', :author_id => a1
a2 = Author.create! :name => 'author 2'
b.update_attributes! :author_id => a2.id
assert_equal a2.id, b.author_id
end
So why doesn't it like it when the belongs_to is used? Seems odd.
On May 24, 6:04 am, Jeff Schoolcraft <[email protected]>
wrote:
> your Author should :have_many :books
> You also want to do something like this:
>
> dave = Author.create(:name => 'Dave Thomas')
> pickaxe = dave.books.build(:title => 'Programming Ruby 1.9')
>
>
>
> On Sun, May 24, 2009 at 3:46 AM, Sean K <[email protected]> wrote:
>
> > Under Rails 2.3.2 using a completely brand new project, I have 2
> > models:
>
> > class Author < ActiveRecord::Base
> > # name:string
> > end
>
> > class Book < ActiveRecord::Base
> > # title:string
> > belongs_to :author # author_id
> > end
>
> > And a simple test where i create a Book with an Author using the
> > belongs_to and then update the foreign key directly:
>
> > require 'test_helper'
>
> > class BookTest < ActiveSupport::TestCase
> > test "foreign key updating" do
> > a1 = Author.create! :name => 'author 1'
> > b = Book.create! :title => 'rails', :author => a1
> > a2 = Author.create! :name => 'author 2'
> > b.update_attributes! :author_id => a2.id
> > assert_equal a2.id, b.author_id # author_id is still a1.id!
> > end
> > end
>
> > The test fails on the last line. Am i doing something wrong or is
> > this expected behaviour?
>
> --
> Jeff Schoolcrafthttp://thequeue.net/blog/
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