如果记录具有与数组中任何ID相同的ID，则选择记录 [英] Select record if the records has same id as any of the ID's in the Array

问题描述

我很难找到正确的语法和运算符来检查记录是否具有与数组中存储的任何ID相同的ID。是否有有功能？函数或类似功能？

I am having trouble finding the right syntax and operator to check if a record has the same ID of any of the ID's stored in an Array. Is there a has any? function or similar?

@problem = Remedy.where(["LOWER(\"remedyName\") LIKE?", "%#{params[:searchremedy]}%".downcase]).pluck(:id)

@pretreatments =  Treatment.joins(:remedies_treatment).where(:remedies_treatment_remedy_id == @problem)

I已将代码更新为：

 ids = Remedy.where(["LOWER(\"remedyName\") LIKE?", "%#{params[:searchremedy]}%".downcase]).pluck(:id)

 @pretreatments = Treatment.joins(:remedies_treatments).where(remedies_treatments: { remedy_id: @problem })

但是我现在遇到的错误是：

However the error I am getting now is:

     SELECT "treatments".* FROM "treatments" INNER JOIN "remedies_treatments" ON "remedies_treatments"."treatment_id" = "treatments"."id" WHERE "remedies_treatment"."remedy_id" IS NULL
Completed 500 Internal Server Error in 157ms (ActiveRecord: 17.0ms)

ActiveRecord::StatementInvalid (PG::UndefinedTable: ERROR:  missing FROM-clause entry for table "remedies_treatment"
LINE 1: ...atments"."treatment_id" = "treatments"."id" WHERE "remedies_...
                                                             ^
: SELECT "treatments".* FROM "treatments" INNER JOIN "remedies_treatments" ON "remedies_treatments"."treatment_id" = "treatments"."id" WHERE "remedies_treatment"."remedy_id" IS NULL):
  app/controllers/treatments_controller.rb:116:in `index'



ActiveRecord::StatementInvalid: PG::UndefinedTable: ERROR:  missing FROM-clause entry for table "remedies_treatment"
LINE 1: ...atments"."treatment_id" = "treatments"."id" WHERE "remedies_...
                                                             ^
: SELECT "treatments".* FROM "treatments" INNER JOIN "remedies_treatments" ON "remedies_treatments"."treatment_id" = "treatments"."id" WHERE "remedies_treatment"."remedy_id" IS NULL
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.2.5/lib/active_record/connection_adapters/postgresql_adapter.rb:592:in `async_exec'

推荐答案

由于您希望匹配ID，因此请获取列表，并在下一个查询中使用它：

Since you wish to match ids, so get the list, and use it in next query:

ids = Remedy.where(["LOWER(\"remedyName\") LIKE?", "%#{params[:searchremedy]}%".downcase]).pluck(:id)

Treatment.joins(:remedies_treatments).where(remedies_treatments: { remedy_id: ids })

注意：在治疗：

class Treatment
   has_many :remedies_treatments
end

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