Ruby on rails ActiveRecord:：ReportsController中的UnknownAttributeError#导入未知属性''；卫报

我想导入监护人详细信息的excel。但当我选择excel导入时，它会给我错误信息 监护人的未知属性

这是我的代码：

卫报.rb

class Guardian < ActiveRecord::Base
  COLUMNS_TO_STRING = ["student_id"] # and so on
  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]
      row = clean_for row, COLUMNS_TO_STRING
      record = Guardian.find_by(:student_id => row["student_id"]) || new
      record.attributes = row.to_hash.slice(*row.to_hash.keys)
      record.create!
    end
  end

  def self.clean_for row_as_hash, string_columns_array
    row_as_hash.each do |key, value|
      if string_columns_array.include?key
        row_as_hash[key] = value.to_i.to_s
      end
    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
end

import.html.erb

<h1>IMPORT</h1>
<div class = "well">
<p>
<%= form_tag import_reports_path,url:{action:   'import_excel',controller: 'reports'}, multipart: true do %>
    <%= file_field_tag :file%>
    <br>
  <%= submit_tag "Import",class: "btn btn-primary" %>
<% end %>
</p>
</div>

导入

excel中的值为零，因此我在ReportsController中得到了一个错误，即为Guardian导入未知属性“”

Debugging solved my problem:
`pry(Guardian)> header = spreadsheet.row(1)
 => ["first_name",
 "last_name",
 "relation",
 "student_id",
 "email",
 "office_phone1",
 "office_phone2",
 "mobile_phone",
 "office_address_line1",
 nil,
 "office_address_line2",
 "city",
 "state",
 "country_id",
 "dob",
 "occupation",
 "income",
 "education"]`

---

你能把错误的全部信息都发出去吗？更容易看出错误的确切来源。还有一件事：我想表单标记中的url散列是不必要的。我在这一行得到了错误

record.attributes=row.to\u hash.slice（*row.to\u hash.keys）

你能检查一下row.to\u hash.slice（*row.to\u hash.keys）返回的是什么吗？问题可能出在：：clean_for中，因此您可以尝试对其进行调试。

[“名字”、“姓氏”、“关系”、“学生id”、“电子邮件”、“办公电话1”、“办公电话2”、“手机”、“办公地址1”、“无”、“办公地址2”、“城市”、“州”、“国家id”、“dob”、“职业”、“收入”、“教育”]

谢谢你的回答excel中的值为零，我调试了它并完成了。

Debugging solved my problem:
`pry(Guardian)> header = spreadsheet.row(1)
 => ["first_name",
 "last_name",
 "relation",
 "student_id",
 "email",
 "office_phone1",
 "office_phone2",
 "mobile_phone",
 "office_address_line1",
 nil,
 "office_address_line2",
 "city",
 "state",
 "country_id",
 "dob",
 "occupation",
 "income",
 "education"]`