如何在Rails中将分页的XML(plist)数据插入数据库?

时间:2012-12-07 21:06:03

标签: ruby-on-rails xml ruby-on-rails-3 mongodb mongoid

我从外部API获取大量XML数据。

它为我提供了所有分页数据,每页有20条记录。

它还为我提供了每个文档的总记录数。

我正在使用Typhoeus gem获取XML -in plist数据,我正在用Plist gem转换它,我将它们插入到数据库中。

问题是;我可以轻松插入前20条记录 - 这意味着第一页。但是,如何计算每个文档的页数以及如何动态查询其他页面?

这是我的控制器和动作。它适用于第一页,但不适用于其他页面。

class Admin::VideosController < ApplicationController
def index


      @videos = Video.where(program_id: params[:p_id])
      @program = Program.find(params[:p_id])


    if params[:cmd]=="get_videos_from_outer"
        @page=1
        @fetch = Typhoeus::Request.post("URL", :params => {:commandtype=>"getprogramepisodes", :feedtype=>"plist",:id=>@program.kid, :page=>@page})
        @plist = Plist::parse_xml(@fetch.body.force_encoding 'utf-8')

        import_outer_videos(@plist)
        redirect_to :action=>"index", :p_id=>params[:p_id]

    end


  end
end

在这里,我正在分析数据:

private

def import_outer_videos(plist)
  @total_count = plist.second.first['totalCount']
  if !plist.blank?

        plist.second.each_with_index do |t, i| 



                if @page==1
                   if i > 0
                   @new = Video.create(:thumb_path=>t['tnPath'], :vid=>t['id'], :title=>t['title'], :type=>t['type'], :kid=>@program.kid, :program_id=>@program.id)

                    end
                else
                  @new = Video.create(:thumb_path=>t['tnPath'], :vid=>t['id'], :title=>t['title'], :type=>t['type'], :kid=>@program.kid, :program_id=>@program.id)       

                end

        end
        @page = @page + 1 unless @page >=  @total_count/20 rescue 0
        puts "###############################    #{@page}   - #{@total_count}  ###############################"
          if @new.errors.blank?
          flash[:notice]="Videos has been uploaded."
          else
            flash[:notice]="No new video."
          end

      end

end

PS:我正在使用MongoDB和Mongoid。

提前感谢您的帮助。

1 个答案:

答案 0 :(得分:1)

我自己解决了这个问题。对于任何可能需要做类似事情的人来说,这是我的解决方案。

def get_videos_from_outer(page=params[:page], kid=params[:kid], totalCount="")

        @videos = Video.where(program_id: params[:p_id])
        @program = Program.find(params[:p_id])

        @fetch = Typhoeus::Request.post("URL", :params => {:commandtype=>"getprogramepisodes", :feedtype=>"plist",:id=>kid.to_i, :page=>page.to_i})
        @plist = Plist::parse_xml(@fetch.body.force_encoding 'utf-8')



          @totalCount = @plist.second.first['totalCount']

          if !totalCount.blank?
            @totalCount = totalCount
          end
        import_outer_videos(@plist, kid, page.to_i, @totalCount.to_i)

  end

import_outer_videos方法。

private

def import_outer_videos(plist, kid, page, totalCount)

         @totalCount = totalCount

        plist.second.each_with_index do |t, i| 
        # First page has odd data and here we're getting rid off them
                if page.to_i==1
                   if i > 0
                   @new = Video.create(:thumb_path=>t['tnPath'], :vid=>t['id'], :title=>t['title'], :type=>t['type'], :kid=>kid, :program_id=>@program.id)

                    end
                else
                  @new = Video.create(:thumb_path=>t['tnPath'], :vid=>t['id'], :title=>t['title'], :type=>t['type'], :kid=>kid, :program_id=>@program.id)       

                end

        end

        if page.to_i < (@totalCount.to_i/20) + 1
        page = page.to_i + 1 

        get_videos_from_outer(page.to_i, kid.to_i, @totalCount)
        else
          redirect_to :action=>"index", :p_id=>params[:p_id]
        end

          if @new.errors.blank?
          flash[:notice]="#{@totalCount} videos has been transfered."
          else
            flash[:notice]="No new video."
          end
end