Ruby on rails 396导入CSV和Excel找不到没有ID的员工

我正在使用rails 4。我遵循Railscast教程并选择了该文件，但在导入时，我在/employees/import处发现了以下错误：ActiveRecord:：RecordNotFound 找不到没有ID的员工

宝石路

路由文件

 resources :employees do
      collection { post :import }
      end

模型

员工控制员

class EmployeesController < ApplicationController
  before_action :set_employee, only: [:show, :edit, :update, :destroy, :import]

  # GET /employees
  # GET /employees.json
  def index
  @employee = Employee.where(:status => true)
  @turnover_employee = Employee.where(:status => false)
   respond_to do |format|
    format.html
    format.csv { send_data @employee.to_csv}
    format.xls #{ send_data @employee.to_csv(col_sep: "\t") } /// Alternativa ///

   end
  end


  def import
  Product.import(params[:file,:id])
  redirect_to root_url, notice: "Products imported."
end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_employee
      @employee = Employee.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def employee_params
      params.require(:employee).permit(:identifier, :first_name, :last_name, :address, :phone, :status, :service_company_id)
    end
end

进口索引表

<%= form_tag import_employees_path, multipart: true do %>
  <%= file_field_tag :file, :class=> "btn  icon-upload"  %> |
  <%= submit_tag "Importar", :class=> "btn  icon-upload" %>
<% end %>

---

在模型的导入类方法中类似：

employee = Employee.where(id: employee_hash["id"]) || new

在employee_哈希[id]中找不到值。因此，您实际上是在做Employee.whereid:nil

---

我看不到employee\u hash设置到任何位置。

我使用以下代码使其工作：

def self.import(file)
  allowed_attributes = ["identifier","first_name","last_name","address","phone"]
  spreadsheet = open_spreadsheet(file)
  header = spreadsheet.row(1)
  (2..spreadsheet.last_row).each do |i|
    row = Hash[[header, spreadsheet.row(i)].transpose]
    employee = find_by_identifier(row["identifier"]) || new
    employee.attributes = row.to_hash.select { |k,v| allowed_attributes.include? k }
    employee.save!
  end
end

def self.open_spreadsheet(file)
  case File.extname(file.original_filename)
  when ".csv" then Roo::Csv.new(file.path, :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

我更改id以搜索标识符。因为在excel中 员工没有id，但有标识符。并删除 没有帮助。 另一个变化是' 发件人：

.csv然后csv.newfile.path，nil，：忽略

致：

删除rails 4所需的“iconv”工程

---

让它为csv工作，我会发布一个代码更新，看看我是否能在代码上得到一些帮助。谢谢你的回复，如果你能解释一下你做了什么，而不仅仅是发布代码，fastIt会让你的回答更好。

def self.import(file)
  allowed_attributes = ["identifier","first_name","last_name","address","phone"]
  spreadsheet = open_spreadsheet(file)
  header = spreadsheet.row(1)
  (2..spreadsheet.last_row).each do |i|
    row = Hash[[header, spreadsheet.row(i)].transpose]
    employee = find_by_identifier(row["identifier"]) || new
    employee.attributes = row.to_hash.select { |k,v| allowed_attributes.include? k }
    employee.save!
  end
end

def self.open_spreadsheet(file)
  case File.extname(file.original_filename)
  when ".csv" then Roo::Csv.new(file.path, :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

".csv" then Roo::Csv.new(file.path, :ignore)