在 ruby​​ on rails 中使用 roo gem 导入 .xlsx 文件时出错

Question

我收到以下错误：

NoMethodError in ClientsController#table
undefined method `phone' for nil:NilClass

当我尝试将 .xlsx、.xls 或 .csv 文件导入 ruby​​ on rails 应用程序时会发生这种情况。

型号代码如下：

attr_accessible :name, :kind, :address_attributes, :emails_attributes, :phones_attributes, :attachments_attributes

  def self.import(file)
    spreadsheet = open_spreadsheet(file)
    header = spreadsheet.row(1)
    (2..spreadsheet.last_row).each do |i|
      row = Hash[[header, spreadsheet.row(i)].transpose]
      client = find_by_id(row["id"]) || new
      client.attributes = row.to_hash.slice(*accessible_attributes)
      client.save!
    end
  end

  def self.open_spreadsheet(file)
    case File.extname(file.original_filename)
      when '.csv' then Roo::Csv.new(file.path)
      when '.xls' then Roo::Excel.new(file.path)
      when '.xlsx' then Roo::Excelx.new(file.path)
    else
      raise "Unknown file type: #{file.original_filename}"
    end
  end

控制器代码如下：

  def import
    Client.import(params[:file])
    redirect_to clients_path, notice: "Clients imported."
  end

apps/Services/config/application.rb 文件包含以下代码：

require 'csv'
require 'iconv'

gem 文件包括以下内容：

gem 'roo', '~> 2.1.0'
gem "iconv", "~> 1.0.3"
gem 'roo-xls'

Answer 1

我认为您应该为 Roo gem 使用这种语法：

def self.open_spreadsheet(file)
  case File.extname(file.original_filename)
  when ".csv" then Roo::CSV.new(file.path, nil, :ignore)
  when ".xls" then Roo::Excel.new(file.path, nil, :ignore)
  when ".xlsx" then Roo::Excelx.new(file.path, nil, :ignore)
  else 
    raise "Unknown file type: #{file.original_filename}"
  end
end