Rails Geocoder 按距离排序

问题描述

我无法按距离对地理编码结果进行排序。对于我现在拥有的实现来说，实现非常简单，但我似乎无法按距离对其进行排序，因为距离是在对象序列化时计算的。我正在尝试按 distance_to_user 属性排序，但结果只是以随机顺序返回。

locations_controller.rb

def index
        max = 250
        per_page = [(params[:per_page] || max).to_i,max].min
        offset   = params[:offset]
        @language ||= helpers.current_language

        location_scope = apply_scopes(Location).includes(store: [:language,:offers]).references(:stores)
                            .where('stores.language_id = ?',@language.id)
                            .reorder('locations.updated_at desc')
                            .assigned
        total_count = location_scope.count(:all)
        locations = location_scope.limit(per_page).offset(offset)
        render jsonapi: locations,include: [:store],expose: { user_location: user_location,language: @language },links: pagination_links(total_count,offset.to_i,per_page.to_i,@language,controller_name,action_name)
end

serializable_location.rb

class SerializableLocation < JSONAPI::Serializable::Resource
  type 'locations'
  attribute :shop_name
  attribute :full_address
  attribute :latitude
  attribute :longitude
  belongs_to :store
  attribute :distance_to_user do
    if @user_location.present?
      locale = @language.locale
      distance = Geocoder::Calculations.distance_between([@object[:longitude],@object[:latitude]],@user_location)
      converted_distance = LocationsHelper.convert_distance(locale,distance)
      ActionController::Base.helpers.number_to_human(converted_distance,units: :distance,format: "%n%u")
    end
  end
end

解决方法

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