红宝石刮板.如何导出为CSV? [英] Ruby scraper. How to export to CSV?

问题描述

我写了这个ruby脚本来从制造商的网站上抓取产品信息.产品对象在数组中的抓取和存储有效，但是我不知道如何将数组数据导出到csv文件中.抛出此错误: scraper.rb:45:main:Object的未定义方法"send_data"(NoMethodError)

I wrote this ruby script to scrape product info from the manufacturer website. The scraping and storage of the product objects in an array works, but I can't figure out how to export the array data to a csv file. This error is being thrown: scraper.rb:45: undefined method `send_data' for main:Object (NoMethodError)

我不理解这段代码.这是怎么做的，为什么它不能正常工作?

I do not understand this piece of code. What's this doing and why isn't it working right?

  send_data csv_data, 
            :type => 'text/csv; charset=iso-8859-1; header=present', 
            :disposition => "attachment; filename=products.csv" 

完整代码:

#!/usr/bin/ruby

require 'rubygems'
require 'anemone'
require 'fastercsv'

productsArray = Array.new

class Product
    attr_accessor :name, :sku, :desc
end

# Scraper Code

Anemone.crawl("http://retail.pelicanbayltd.com/") do |anemone|
    anemone.on_every_page do |page|

        currentPage = Product.new

        #Product info parsing
        currentPage.name = page.doc.css(".page_headers").text
        currentPage.sku = page.doc.css("tr:nth-child(2) strong").text
        currentPage.desc = page.doc.css("tr:nth-child(4) .item").text

        if currentPage.sku =~ /#\d\d\d\d/
            currentPage.sku = currentPage.sku[1..-1]
            productsArray.push(currentPage)
        end
    end
end

# CSV Export Code

products = productsArray.find(:all) 
csv_data = FasterCSV.generate do |csv| 
    # header row 
    csv << ["sku", "name", "desc"] 

    # data rows 
    productsArray.each do |product| 
      csv << [product.sku, product.name, product.desc] 
    end 
  end 

  send_data csv_data, 
            :type => 'text/csv; charset=iso-8859-1; header=present', 
            :disposition => "attachment; filename=products.csv" 

推荐答案

File.open('filename.csv', 'w') do |f|
  f.write(csv_data)
end

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