gistfile1.txt

begin
    content.save!
    content.sources.create(
        {
        # bla
        }
    )
rescue ActiveRecord::RecordNotUnique
    next
rescue ActiveRecord::RecordInvalid => e
    Base.error("Error during creation #{content.attributes} from #{meta}")
    raise e
end

=> #<ActiveRecord::RecordNotUnique: Mysql2::Error: Duplicate entry '35291380' for key 'index_content_meta_on_content_id'