undefined method `id' for #<Array:0x00007f9f20e708a8>

[amadeuspagel]

According to the readme, add_parent accepts multiple arguments, or an array. But if I try to pass an array I get this error. Just adding a single record works.

[njakobsen]

I encountered a strange bug while bringing the specs back up to passing status. See c481c82#diff-4b3866a09deeb45bab597a7d54632213R307. I believe this may solve your issue, but I don't have any more information on what is causing it. This gem was originally written for Rails 2.0 and is suffering from code rot as new versions of Rails change some of the mechanisms it relied upon. PRs are welcome.