Select 记录是否与数组中的任何 ID 具有相同的 ID

Question

我无法找到正确的语法和运算符来检查记录的 ID 是否与存储在数组中的任何 ID 相同。是否有 has any? 函数或类似函数？

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

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

我已将代码更新为：

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

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

但是我现在得到的错误是：

     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'

Answer 1

使用 ActiveRecord，您可以从数据库中搜索匹配的记录：

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

这对 where 子句使用 Hash 语法，指定您要检索 remedies_treatment_remedy_id 包含 @problem 中任何值的任何记录。

Answer 2

既然你想匹配id，那么获取列表，并在下一个查询中使用它：

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

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

注意：你应该在Treatment中有以下关系：

class Treatment
   has_many :remedies_treatments
end

Select 记录是否与数组中的任何 ID 具有相同的 ID

Select record if the records has same id as any of the ID's in the Array

postgresql

activerecord

ruby-on-rails

has-many