Ruby on rails 为什么我会得到；未初始化的常量ApplicationController:：SessionHelper“；错误？

我没有会话模型，只有用户和任务模型

app/helpers/sessions\u helper.rb

module SessionsHelper

  def sign_in(user)
    session[:user_id] = user.id
    self.current_user = user
  end

  def current_user=(user)
    @current_user = user
  end

  def current_user
    if session[:user_id]
    @current_user ||= User.find(session[:user_id])
    end
  end

  def signed_in?
    !current_user.nil?
  end

  def sign_out
    session[:user_id] = nil
    self.current_user = nil
  end

  def current_user?(user)
    user == current_user
  end

  def deny_access
    redirect_to signin_path, notice: "Please sign in to access this page."
  end

end

class ApplicationController < ActionController::Base
  protect_from_forgery with: :exception
  include SessionHelper
end

class User < ActiveRecord::Base
 has_many :tasks

  attr_accessor :password
  EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
  validates :first_name, presence: true,
            length: {maximum: 20}
  validates :last_name,  presence: true,
            length: {maximum: 40}
  validates :email, presence: true,
            format: {with: EMAIL_REGEX},
            uniqueness:  {case_sensitive: false}
  validates :password, presence: true,
            confirmation: true,
            length: {within: 6..40}

  before_save :encrypt_password

  def has_password?(submitted_password)
    encrypted_password == encrypt(submitted_password)
  end

  def self.authenticate(email, submitted_password)
    user = find_by_email(email)

    return nil if user.nil?
    return user if user.has_password?(submitted_password)
  end

  private
    def encrypt_password
      self.salt = Digest::SHA2.hexdigest("#{Time.now.utc}--#{password}") if self.new_r

      self.encrypted_password = encrypt(password)
    end

    def encrypt(pass)
      Digest::SHA2.hexdigest("#{self.salt}--#{pass}")
    end

  end

我将SessionHelper包含在应用程序控制器中

app/controllers/application\u controller.rb

module SessionsHelper

  def sign_in(user)
    session[:user_id] = user.id
    self.current_user = user
  end

  def current_user=(user)
    @current_user = user
  end

  def current_user
    if session[:user_id]
    @current_user ||= User.find(session[:user_id])
    end
  end

  def signed_in?
    !current_user.nil?
  end

  def sign_out
    session[:user_id] = nil
    self.current_user = nil
  end

  def current_user?(user)
    user == current_user
  end

  def deny_access
    redirect_to signin_path, notice: "Please sign in to access this page."
  end

end

class ApplicationController < ActionController::Base
  protect_from_forgery with: :exception
  include SessionHelper
end

class User < ActiveRecord::Base
 has_many :tasks

  attr_accessor :password
  EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
  validates :first_name, presence: true,
            length: {maximum: 20}
  validates :last_name,  presence: true,
            length: {maximum: 40}
  validates :email, presence: true,
            format: {with: EMAIL_REGEX},
            uniqueness:  {case_sensitive: false}
  validates :password, presence: true,
            confirmation: true,
            length: {within: 6..40}

  before_save :encrypt_password

  def has_password?(submitted_password)
    encrypted_password == encrypt(submitted_password)
  end

  def self.authenticate(email, submitted_password)
    user = find_by_email(email)

    return nil if user.nil?
    return user if user.has_password?(submitted_password)
  end

  private
    def encrypt_password
      self.salt = Digest::SHA2.hexdigest("#{Time.now.utc}--#{password}") if self.new_r

      self.encrypted_password = encrypt(password)
    end

    def encrypt(pass)
      Digest::SHA2.hexdigest("#{self.salt}--#{pass}")
    end

  end

class ApplicationController

app/models/user.rb

module SessionsHelper

  def sign_in(user)
    session[:user_id] = user.id
    self.current_user = user
  end

  def current_user=(user)
    @current_user = user
  end

  def current_user
    if session[:user_id]
    @current_user ||= User.find(session[:user_id])
    end
  end

  def signed_in?
    !current_user.nil?
  end

  def sign_out
    session[:user_id] = nil
    self.current_user = nil
  end

  def current_user?(user)
    user == current_user
  end

  def deny_access
    redirect_to signin_path, notice: "Please sign in to access this page."
  end

end

class ApplicationController < ActionController::Base
  protect_from_forgery with: :exception
  include SessionHelper
end

class User < ActiveRecord::Base
 has_many :tasks

  attr_accessor :password
  EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
  validates :first_name, presence: true,
            length: {maximum: 20}
  validates :last_name,  presence: true,
            length: {maximum: 40}
  validates :email, presence: true,
            format: {with: EMAIL_REGEX},
            uniqueness:  {case_sensitive: false}
  validates :password, presence: true,
            confirmation: true,
            length: {within: 6..40}

  before_save :encrypt_password

  def has_password?(submitted_password)
    encrypted_password == encrypt(submitted_password)
  end

  def self.authenticate(email, submitted_password)
    user = find_by_email(email)

    return nil if user.nil?
    return user if user.has_password?(submitted_password)
  end

  private
    def encrypt_password
      self.salt = Digest::SHA2.hexdigest("#{Time.now.utc}--#{password}") if self.new_r

      self.encrypted_password = encrypt(password)
    end

    def encrypt(pass)
      Digest::SHA2.hexdigest("#{self.salt}--#{pass}")
    end

  end

class用户

---

问题可能是什么？

有输入错误，应该是

SessionHelper

而不是

SessionHelper

 include SessionsHelper

---

希望这有帮助

有输入错误，应该是

SessionHelper

而不是

SessionHelper

 include SessionsHelper

---

希望这有帮助

我完全疯了。thanks@AlexanderShmatko如果答案有帮助，请将其标记为正确。很高兴它有帮助，请接受答案！：）我完全疯了。thanks@AlexanderShmatko如果答案有帮助，请将其标记为正确。很高兴它有帮助，请接受答案！：）