If I have two models:

class Post < ActiveRecord::Base
  belongs_to :user
end

and

class User < ActiveRecord::Base
  has_many :posts
end

If I do:

post = Post.new
user = User.new
post.user = user
post.save

Does the user get saved as well and the primary key properly assigned in post's user_id field?

ruby-on-rails activerecord associations
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