PHP Active Record JOINS

[Phinal]

I am using PHP Active Record and i am trying to fetch the articles of specific series and book.The structure is.Four(4) tables (models).Series,Books,Chapters,ArticlesSerie has many BooksBook has many ChaptersChapter has many articles.Sql should be \[code\]SELECT a.id,a.title FROM Articles a JOIN Chapters c ON c.id=a.chapter_id JOIN Books b ON b.id=c.book_id JOIN Series s ON s.id=b.serie_id WHERE s.id=3 AND b.id=256\[/code\]I am having issues with the relations in PHP Active Record.