[英]Rails: How would I retrieve records where child element includes any of another array?
我有一個用戶和文檔模型,都具有tag_lists(來自acts_as_taggable)
我想查找具有某個用戶具有的任何標簽的文檔。 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"]
我想做類似的事情
Document.where(tag_list.includes_any?("all-users" || user.tag_list))
->將檢索文檔A,B,C。
顯然語法是錯誤的,但是您可以理解。 我將如何有效地做到這一點?
-------更新
只是,tag_list既不是User模型也不是User模型的直接屬性,而是來自acts_as_taggable gem的活動記錄關系:如何在.where運算符中調用它?
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"]]
=> []
這可能對您有幫助:
Document.where((tag_list-["all-users", user.tag_list].flatten).size != tag_list.size)
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