Rails/Grape 应用程序中的排序错误 ActiveRecord::StatementInvalid PG::UndefinedColumn

Question

I want to sort all Campaign by campaign_code in my admin panel, to do so I've created code below in my endpoint and serializer which front will be have in response. The same logic works well for sorting by id or name but it wont worked for sorting of existing campagin_code number.

endpoint

optional :sort, type: Hash do
 optional :sort, type: Hash do
  optional :total, type: String, values: %w[asc desc]
 end
end

get do
  scoped_collection = scope_admin_resource(filter(Campaign.all))
  admin_serialize paginate(filter(sort(scoped_collection)))
end

serializer

class CampaignSerializer
  attributes :id, :total,

  attribute :total do |campaign|
    campaign.campaign_codes.count
  end
end

With that code I've an error:

ActiveRecord::StatementInvalid (PG::UndefinedColumn: ERROR: column campaigns.total does not exist

Answer 1

There is no such column in campaigns table