尝试使用Rails 3注册一个表单时出现以下错误，并且在验证过程进行时会出现此错误。
错误：
1 error prohibited this post from being saved:
Password digest can't be blank
我在登录页面中还记得我的功能。请检查我的以下代码，并尝试帮我解决此错误。
class AdminsController < ApplicationController
def create_registration
@admin=Admin.new(params[:admin])
if @admin.save
flash[:notice]="User has created successfully"
flash[:color]="valid"
redirect_to :action => "index" , :controller => 'homes'
else
flash[:alert]="User could not created"
flash[:color]="invalid"
render 'homes/index'
end
end
def forget
@admin=Admin.new
end
def resetpass
@admin=Admin.find_by_email(params[:admin][:email])
if @admin.email==params[:admin][:email]
UserMailer.registration_confirmation(@admin).deliver
flash[:notice]="Check your email to reset the password"
flash[:color]="valid"
redirect_to :action => "index" , :controller => 'homes'
else
flash[:alert]="Invalid email id"
flash[:color]="invalid"
render 'homes/index'
end
end
def editpass
@admin=Admin.new
end
def setpass
@admin=Admin.find(params[:id])
if @admin.update_attributes(params[:admin])
flash[:notice]="Your password has updated successfully"
flash[:color]="valid"
redirect_to :action => "index" , :controller => 'homes'
else
flash[:alert]="Your password could not updated"
flash[:color]="invalid"
render 'editpass'
end
end
end
class Admin < ActiveRecord::Base
attr_accessible :email, :password_hash, :password_salt, :picture, :user_name,:password_confirmation,:password, :remember_me
attr_accessor :password
attr_accessor :remember_token
before_save :encrypt_password
mount_uploader :picture, PictureUploader
EMAIL_REGEX = /\A[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}\z/i
validates :email, :presence => true, :uniqueness => true, :format => EMAIL_REGEX
validates :password, presence: true, length: { minimum: 6 }
validates :password_confirmation, presence: true
has_secure_password
def encrypt_password
if password.present?
self.password_salt = BCrypt::Engine.generate_salt
self.password_hash = BCrypt::Engine.hash_secret(password, password_salt)
end
end
def self.authenticate(email, password)
user = find_by_email(email)
if user && user.password_hash == BCrypt::Engine.hash_secret(password, user.password_salt)
user
else
nil
end
end
def Admin.digest(string)
cost = 10
BCrypt::Password.create(string, cost: cost)
end
# Returns a random token.
def Admin.new_token
SecureRandom.urlsafe_base64
end
# Remembers a user in the database for use in persistent sessions.
def remember
self.remember_token = Admin.new_token
update_attribute(:remember_digest, Admin.digest(remember_token))
end
def forget
update_attribute(:remember_digest, nil)
end
end
<div class="container">
<div style="text-align:center;"><img src="/assets/admin.png" style="width:100px; height:120px; " /></div>
<div class="text-div" style="text-align:center;">Swargadwar, Puri Municipality,govt of odisha</div>
<section>
<% if !current_user %>
<div id="container_demo" >
<!-- hidden anchor to stop jump http://www.css3create.com/Astuce-Empecher-le-scroll-avec-l-utilisation-de-target#wrap4 -->
<a class="hiddenanchor" id="toregister"></a>
<a class="hiddenanchor" id="tologin"></a>
<div id="wrapper">
<div id="login" class="animate form">
<%= form_for :admin,:url => {:action =>'loginadmin',:controller => 'sessions' } do |f| %>
<h1>Log in</h1>
<p>
<label for="username" class="uname" data-icon="u" > Your email or username </label>
<%= f.email_field :email,placeholder:"mysupermail@mail.com",:id => "username" %>
</p>
<p>
<label for="password" class="youpasswd" data-icon="p"> Your password </label>
<%= f.password_field :password,placeholder:"eg. X8df!90EO",:id => "password" %>
</p>
<p class="keeplogin">
<%= f.check_box :remember_me,:id => "loginkeeping" %>
<label for="loginkeeping">Keep me logged in</label>
<%= link_to 'Forgetting password ?',admins_forget_path %>
</p>
<p class="login button">
<%= f.submit "Login" %>
</p>
<p class="change_link">
Not a member yet ?
<a href="#toregister" class="to_register">Join us</a>
</p>
<% end %>
</form>
</div>
<div id="register" class="animate form">
<%= form_for :admin,:url => {:action => 'create_registration',:controller => "admins" } do |f| %>
<h1> Sign up </h1>
<p>
<label for="usernamesignup" class="uname" data-icon="u">Your username</label>
<%= f.text_field :user_name,placeholder:"mysuperusername690",:id => "usernamesignup" %>
</p>
<p>
<label for="emailsignup" class="youmail" data-icon="e" > Your email</label>
<%= f.email_field :email,placeholder:"mysupermail@mail.com",:id => "emailsignup" %>
</p>
<p>
<label for="passwordsignup" class="youpasswd" data-icon="p">Your password </label>
<%= f.password_field :password,placeholder:"eg. X8df!90EO",:id => "passwordsignup" %>
</p>
<p>
<label for="passwordsignup_confirm" class="youpasswd" data-icon="p">Please confirm your password </label>
<%= f.password_field :password_confirmation,placeholder:"eg. X8df!90EO",:id => "passwordsignup" %>
</p>
<p>
<label for="usernamesignup" class="uname" data-icon="u">Add Image</label>
<%= f.file_field :picture %>
</p>
<p class="signin button">
<%= f.submit "Sign Up"%>
</p>
<p class="change_link">
Already a member ?
<a href="#tologin" class="to_register"> Go and log in </a>
</p>
<% end %>
</div>
<div class="error-div">
<% if @admin.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@admin.errors.count, "error") %> prohibited this post from being saved:</h2>
<ul>
<% @admin.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
</div>
</div>
</div>
<% end %>
</section>
</div>
source 'https://rubygems.org'
gem 'rails', '3.2.19'
# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'
gem 'mysql'
# Gems used only for assets and not required
# in production environments by default.
group :assets do
gem 'sass-rails', '~> 3.2.3'
gem 'coffee-rails', '~> 3.2.1'
# See https://github.com/sstephenson/execjs#readme for more supported runtimes
# gem 'therubyracer', :platforms => :ruby
gem 'uglifier', '>= 1.0.3'
end
gem 'jquery-rails'
# To use ActiveModel has_secure_password
# gem 'bcrypt-ruby', '~> 3.0.0'
#gem 'bcrypt-ruby', :require => 'bcrypt'
gem 'bcrypt-ruby', '~> 3.0.0'
# To use Jbuilder templates for JSON
# gem 'jbuilder'
# Use unicorn as the app server
# gem 'unicorn'
# Deploy with Capistrano
# gem 'capistrano'
# To use debugger
# gem 'debugger'
gem 'carrierwave'
我还在admin模块中添加了remember_me，remember_digest，password_digest等字段。请帮我解决上述错误。