在 rails 中链接范围以获得一个或两个范围的结果

如何解决在 rails 中链接范围以获得一个或两个范围的结果

所以我目前正在尝试使用 graphql ruby​​ 在 rails 中创建一些可链接的范围。我有以下代码：

查询解析器：

module Queries
  class Objectives < Queries::ListQuery
    description 'Find objectives'

    type Types::Objectives::ObjectiveType.connection_type,null: false
    argument :filter,Types::Filters::ObjectiveRansackType,required: false,default_value: {}
    argument :owner_id,String,required: false
    argument :status,Types::Objectives::ObjectiveStatus,required: false

    def resolve(**args)
       filter = return_filter(args[:filter])
       super(::Objective.ransack((filter || {}).to_hash).result,**args)
    end

    def return_filter(filter)
      if filter[:status_eq] && filter[:status_eq] == "AWAITING_REVIEW"
        new_filter = filter.to_hash
        if filter[:stakeholder_id_eq] 
          new_filter[:awaiting_review_by_stakeholder_id] = filter[:stakeholder_id_eq]
          if filter[:awaiting_review]
            new_filter[:awaiting_review] = filter[:owner_id_eq] || current_user.id
          end
        else
          new_filter[:awaiting_review] = filter[:owner_id_eq]
        end
        new_filter = new_filter.except(:status_eq)
        return new_filter
      else
        return filter
      end
    end
  end
end

在我的模型中：

  scope :awaiting_review,lambda { |user_id| 
    joins(
      "LEFT JOIN reviews on reviews.reviewable_id = objectives.id and reviews.user_id = #{ActiveRecord::Base.connection.quote(user_id)}"
    )
    .where(
      "reviews.id is NULL and objectives.owner_id = #{ActiveRecord::Base.connection.quote(user_id)} and objectives.status = 'COMPLETED'"
    )
}

scope :awaiting_review_by_stakeholder_id,lambda { |stakeholder_id| 
  joins(
    "LEFT JOIN objective_stakeholders as stakeholder_objectives on objectives.id = stakeholder_objectives.objective_id and stakeholder_objectives.stakeholder_id = #{ActiveRecord::Base.connection.quote(stakeholder_id)}"
  )
  .joins(
    "LEFT JOIN reviews on reviews.reviewable_id = objectives.id and (stakeholder_objectives.stakeholder_id = reviews.user_id)"
  )
  .where(
    "reviews.id is NULL and (stakeholder_objectives.stakeholder_id = #{ActiveRecord::Base.connection.quote(stakeholder_id)}) and objectives.status = 'COMPLETED'"
  )
}

如果这些字段之一在我的过滤器中传递（我使用 ransackable_scopes 来应用范围），我希望它返回其中一个，如果两个字段都存在，则返回两者的结果。现在，如果我传递过滤器参数 awaiting_review: current_user_id 或 awaiting_review_by_stakeholder_id: some_provided_id，这两个参数将分别工作。但它不会同时返回，因为我得到 “PG::Duplicatealias：错误：多次指定表名“评论””。我怎样才能使它正常工作？

非常感谢任何帮助！