TypeError：无法将数组转换为字符串

Question

我在尝试使用nokogiri运行rake任务时遇到这个错误。

namespace :tops do
  desc "Get Tops Description"
  task get_description: :environment do
  require 'nokogiri'
  require 'open-uri'

 doc = Nokogiri::HTML(open("http://ceratoboutique.com/collections/tops"))

  price = Array.new 
  items = Array.new
  brands = Array.new
  sale_price = Array.new
  image = Array.new
  item_url = Array.new

  price = doc.xpath("//del").collect {|node| node.text.strip}
  items = doc.xpath("//div/a/h4").collect {|node| node.text.strip}
  brands = doc.xpath("//span[contains(@class,'vendor')]").collect {|node| node.text.strip}
  sale_price = doc.xpath("//span[contains(@class, 'price')]/text()").collect {|node| node.text.strip}
  image = doc.xpath("/div/a/img/@src").collect {|node| node.text.strip}
  item_url = doc.css('div.details a').map { |link| link['href'] }.collect 

  price.each do |prices|
      Tops.create(description: price)
    end
  end
end

编辑：顶部表架构

    ActiveRecord::Schema.define(version: 20140824150641) do

      create_table "tops", force: true do |t|
        t.string   "brand"
        t.string   "description"
        t.string   "image"
        t.decimal  "price"
        t.datetime "created_at"
        t.datetime "updated_at"
        t.string   "url"
      end
end

Answer 1

您将price设置为一个数组（而不是将其称为price)，这可能是导致您出现以下错误的一个原因

price.each do |prices|
  Tops.create(description: price)
end

您要为迭代的数组赋值，而不是为生成的单个元素赋值。