我有一个User和Document模型，它们都有tag_lists（来自acts_as_taggable）
我想查找具有某个用户的任何标记的文档。例如，
user.tag_list = ["ceo" , "sales"]
documentA.tag_list = ["ceo"]
documentB.tag_list = ["all-users']
documentC.tag_list = ["sales", "marketing"]
documentD.tag_list = ["marketing"]
我想做一些类似的事情
Document.where(tag_list.includes_any?("all-users" || user.tag_list))
->其将检索文档A、B、C。
显然语法是错误的，但你明白了。我该如何有效地做到这一点？
-------更新
请注意，tag_list不是User或Document模型的直接属性，而是来自acts_as_taggable gem的活动记录关系：我如何在.where运算符中调用它？
2.1.1 :036 > Document.last.tag_list
Document Load (3.7ms) SELECT "assignable_objects".* FROM "assignable_objects" WHERE "assignable_objects"."type" IN ('Document') ORDER BY "assignable_objects"."id" DESC LIMIT 1
ActsAsTaggableOn::Tag Load (3.5ms) SELECT "tags".* FROM "tags" INNER JOIN "taggings" ON "tags"."id" = "taggings"."tag_id" WHERE "taggings"."taggable_id" = $1 AND "taggings"."taggable_type" = $2 AND (taggings.context = 'tags' AND taggings.tagger_id IS NULL) [["taggable_id", 52], ["taggable_type", "AssignableObject"]]
=> []
这可能会对您有所帮助：
Document.where((tag_list-["all-users", user.tag_list].flatten).size != tag_list.size)