顺序数组.数组的未定义方法`order'.将数组转换为哈希? [英] Order array. undefined method `order' for Array. Convert array into hash?

问题描述

我有一个城市模型，在城市的表演动作中，我想渲染城市中特定位置附近的酒店.城市有_许多地点；正在使用 Geocoder Near 方法搜索酒店.

I have a City model and in city's show action I want to render hotels nearby specific locations in the city. Cities has_many locations; hotels are being searched using Geocoder near method.

为了添加订单功能，我关注了 Ryan Bates screencasts #228，但这种方法似乎不适用于数组，给出错误 undefined method `order' for #<数组:0x007f960d003430>

To add order functionality I've followed Ryan Bates screencasts #228, but this approach doesn't seem to work with arrays, giving error undefined method `order' for #< Array:0x007f960d003430>

cities_controller.rb

helper_method :sort_column, :sort_direction
def show
  session[:search_radius] = 2 if session[:search_radius].blank?
  @city = City.find(params[:id])
  @locations = @city.locations
  @hotels = []
  @locations.each do |location|
    unless location.longitude.blank? || location.latitude.blank? 
      center_point = [location.latitude, location.longitude]
      box = Geocoder::Calculations.bounding_box(center_point, session[:search_radius])
      thotels = Hotel.near(center_point, session[:search_radius]).within_bounding_box(box)
    else
      thotels = Hotel.near(center_point, session[:search_radius])
    end
    @hotels += thotels if thotels
    @hotels = @hotels.uniq
  end
  @hotels = @hotels.order(sort_column + " " + sort_direction).paginate(:page => params[:page], :per_page => 5)
  @json = @locations.to_gmaps4rails

  respond_with @json, :location => city_url
end


private

  def sort_column
    Hotel.column_names.include?(params[:sort]) ? params[:sort] : "name"
  end

  def sort_direction
    %w[asc desc].include?(params[:direction]) ? params[:direction] : "asc"
  end

我的问题是:我应该专注于将数组转换为散列，还是应该最初创建酒店的散列，或者可能找到完全不同的方法来执行排序?

My question is: should I concentrate in converting an array into hash or should I initially create hash of hotels, or maybe find completely different approach to perform sorting?

推荐答案

order 是一种用于在数据库级别进行排序的方法.由于 @hotels 是一个数组，您将无法使用 order 进行排序.尝试以下操作(未测试，如果您还没有包含数组分页，您可能希望包含它)

order is a method used for sorting at the database level. since @hotels is an array, you won't be able to sort using order. Try the following (not tested and you may want to include array pagination if you haven't included it yet)

@hotels = @hotels.sort_by(&:"#{sort_column}")
@hotels = @hotels.reverse if sort_direction == 'DESC'
@hotels = @hotels.paginate(:page => params[:page], :per_page => 5)

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