我试图通过文件导入格式创建记录可以是csv excel等 我在Railscast396之后实现了它。但是当我导入文件时,它说 “验证失败:电子邮件不能为空,密码不能为空。这是我的代码
class Student < ActiveRecord::Base
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
has_many :quizzes
has_many :classrooms
#to import file
**def self.attr_names
[:email, :password, :password_confirmation]
end**
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.inspect
student = find_by_id(row["id"]) || new
student.attributes = row.to_hash.slice(*attr_names)
student.save!
end
end
def self.open_spreadsheet(file)
case File.extname(file.original_filename)
when ".csv" then Roo::CSV.new(file.path, file_warning: :ignore)
when ".xls" then Roo::Excel.new(file.path, file_warning: :ignore)
when ".xlsx" then Roo::Excelx.new(file.path, file_warning: :ignore)
else raise "Unknown file type: #{file.original_filename}"
end
end
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
end
查看
<%= form_tag addStudents_classrooms_path, multipart: true do %>
<%= file_field_tag :file %>
<%= submit_tag "Import" %>
<% end %>
的routes.rb 资源:教室做 集合{post:addStudents}
csv文件我正在尝试加载
id,email,password,password_confirmation
22,jim@gmail.com,password,password
23,jimhanks@gmail.com,password,password
答案 0 :(得分:0)
这可能是因为#to_hash
没有返回具有无差别访问权限的哈希值。您正在尝试将符号化的键和#to_hash
创建的键切片为字符串。
试试这个:
def self.attr_names
%w(email password password_confirmation)
end