我可以在 Rails 中的其他设备之前加载一些设备以在连接表中循环它们吗？

Question

My Rails (4.2.11.1) application has a User model and a Role model. In my fixtures, I have a users_roles.yml file that I would like to populate by looping through all the fixtures in roles.yml , and assign them to a specific user. I'm doing this with the block below:

users_roles.yml

<% Role.all.each do |role| %>
<%= 'super_test_user' + role.name %>:
  user_id: <%= ActiveRecord::FixtureSet.identify(:super_test_user) %>
  role_id: <%= ActiveRecord::FixtureSet.identify(role.name.to_sym) %>
<% end %>

My issue is that when I run RAILS_ENV=test rake db:fixtures:load , Rails hits the users_roles.yml file first, and so there is nothing in the Role object for it to loop through. I've got hundreds of roles, so want to avoid doing this manually if possible.

Is there a way that I can force Rails to load the roles.yml fixtures before the user_roles.yml file when I call RAILS_ENV=test rake db:fixtures:load ? I've tried the answer at Loading Rails Fixtures in a Specific Order when Testing , but can't get this to work unfortunately. I've adapted this answer in the following way in my test_helper.rb file:

test_helper.rb

class ActiveRecord::FixtureSet
  class << self
    alias :orig_create_fixtures :create_fixtures
  end

  def self.create_fixtures f_dir, fs_names, *args
    Role.delete_all
    User.delete_all

    reset_cache

    fs_names = %w(role user) & fs_names | fs_names

    orig_create_fixtures f_dir, fs_names, *args
  end
end

Have I done something wrong in the above? Or is there another way I could achieve this?

EDIT: I should also add the reason I am loading fixtures in such a way is because this Rails application (let's call it 'A') is being called from another Rails application (B). As such, the test fixtures in 'A' need to be loaded into the test database before application 'B' calls it in the test environment.

Answer 1

OK - so I've found a solution that's a bit hacky but it works. I'll post here in case anyone else runs into the same issue:

1. Run rake db:test:prepare
2. Run RAILS_ENV=test rake db:fixtures:load FIXTURES=roles
3. Now run RAILS_ENV=test rake db:fixtures:load

This ensures all the roles have been pre-loaded into the correct db table and can be referenced from the Role object in the join table fixture file.

I'd prefer to have this automated in the test_helper.rb file though. Any ideas how I could do this?