`id` AS t0_r0, `publications`.`shoot_id` AS t0_r1, `publications`.`slug` AS t0_r4, `publications`.`publish_on` AS t0_r5,
`publications`.`created_at` AS t0_r6, `publica
LEFT JOIN publications_have_publicationTags ON publications_have_publicationTags.publications_publicationsId= publicationTags.publicationTagId
LEFT JOIN publications_have_publicationTypes ON publications.publicationsId= publications_have_publicat
我有以下SQL语句:SELECT article_id FROM publications WHERE category_id IN (SELECT id FROM categories WHERE parent_id我已经尝试过了:Article.find(:all, :conditions => ["publications.category_id IN(?)", 3], :include => [:publications]),它返回空数组。型号:
class Article < ActiveRe