從.csv文件導入記錄在數據庫中創建完全空白的行

Question

所有源代碼都托管在我的GitHub上的cloud_contacts存儲庫中。

我正在使Rails Cast＃396與Rails 4一起使用。我已經使它工作了-sort--，它將導入一個充滿測試數據的文件。 然后，它將在數據庫中為.csv文件中的每個對應行（或聯系人）創建一條記錄。

我還可以在視圖中手動添加新聯系人，這是我自己構建的功能，與Rails Cast不相關。

我的問題是，為什么每個聯系記錄都為空白？ 我認為問題出在我的聯系模型的導入方法上，也許是當每條記錄轉置時，標題中的列名與我數據庫中的列名不匹配。 如果是這種情況（我完全猜到了……），我該如何解決？

所有源代碼都托管在我的GitHub上的cloud_contacts存儲庫中。

但是如果您不喜歡聖誕節和GitHub，並且不想看回購，則這里是我的Contact.rb模型：

class Contact < ActiveRecord::Base
  # attr_accessible :first_name, :last_name, :email_address

  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]
      contact = find_by_id(row["id"]) || new
      contact.attributes = row.to_hash.slice(*accessible_attributes)
      # contact.attributes = row.to_hash.slice(*row.to_hash.keys)
      contact.save!
    end
  end

  def self.open_spreadsheet(file)
    case File.extname(file.original_filename)
      when ".csv" then Roo::CSV.new(file.path, csv_options: {col_sep: ";"})
      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

  private

  def self.accessible_attributes
    [:first_name, :last_name, :email_address]
  end

end

這是我的csv文件中數據的子集：

First Name  Last Name   Email Address   Phone Number    Company Name
Gerhard Kautzer gerhardkautzer@cronabayer.com   1-207-643-1816  Hodkiewicz-Lynch
Myra    Crona   myracrona@schinner.info (724)196-9470 x998  Champlin-Hahn
Josh    Donnelly    joshdonnelly@macejkovic.us  081-799-3139 x248   Casper Group
Verna   Farrell vernafarrell@schillercorkery.name   731.101.6219    Rosenbaum-Hane
Lauriane    Stracke laurianestracke@tremblayturner.biz  1-033-511-1831 x471 Prohaska-Sporer
Kaya    Luettgen    kayaluettgen@christiansen.name  (511)745-9273   Wyman, Trantow and Hane
Steve   Davis   stevedavis@shields.info 787.315.2611 x747   Kuhic-Lowe
Citlalli    Pfeffer citlallipfeffer@lemkeblanda.co.uk   329-584-6962 x047   Gorczany and Sons
Litzy   Turcotte    litzyturcotte@weber.name    1-084-641-4078 x4410    Hintz-Schmitt
River   Lockman riverlockman@shieldsgrant.ca    1-967-129-8359  Rowe LLC
Juvenal Berge   juvenalberge@nienow.co.uk   037-748-7238    Hane Inc

Answer 1

我對您的聯系人模型進行了一些更改，請在下面查看我的評論。

附言 您可能會發現使用better_errors gem有助於您隨時了解變量的外觀。

class Contact < ActiveRecord::Base

  MAPPING = {
    "First Name" => "first_name",
    "Last Name" => "last_name",
    "Email Address" => "email_address"
  }

  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]
      # Convert the keys from the csv to match the database column names
      row.keys.each { |k| row[ MAPPING[k] ] = row.delete(k) if MAPPING[k] }
      # Remove company and phone number fields as these aren't in the database:
      create(row.except!('Company Name', 'Phone Number'))
    end
  end

  def self.open_spreadsheet(file)
    case File.extname(file.original_filename)
      # You're using a tab seperated file, so specify seperator as a tab with \t
      when ".csv" then Roo::CSV.new(file.path, csv_options: {col_sep: "\t"})
      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

end