ArgumentError in UsersController＃引数の数が間違っている（0、予想される1）

Question

最初に、私はrails 5.1.2を使用しています。私は、Webアプリケーションの出発点としてMichael Hartlのチュートリアルを使用しました。私は問題にぶつかりました。

localhostでdevサーバーを実行しているときにWebサイトにサインアップしようとすると、ユーザーの詳細を送信するとエラーが発生します。

ArgumentError in UsersController#create wrong number of arguments (given 0, expected 1) 
Extracted source (around line #21): 

    def create 
    @user = User.new(user_params) 
    if @user.save 
     @user.send_activation_email 
     flash[:info] = "Please check your email to activate your account." 
     redirect_to root_url 

Rails.root: /home/krefey/workspace/gaming-sonar 
Application Trace | Framework Trace | Full Trace 

app/controllers/users_controller.rb:21:in `create' 

私はActiveAdminと工夫をインストールしているし、それが設定されているユーザモデルの問題を引き起こしているのでそれだと思う。

user.rb

class User < ApplicationRecord 
    # Include default devise modules. Others available are: 
    # :confirmable, :lockable, :timeoutable and :omniauthable 
    devise :database_authenticatable, 
     :recoverable, :rememberable, :trackable, :validatable 
    attr_accessor :remember_token, :activation_token, :reset_token 
    before_save :downcase_email 
    before_create :create_activation_digest 
    validates :name, presence: true, length: { maximum: 50 } 
    VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-]+(\.[a-z\d\-]+)*\.[a-z]+\z/i 
    validates :email, presence: true, length: { maximum: 255 }, 
        format: { with: VALID_EMAIL_REGEX }, 
      uniqueness: { case_sensitive: false } 
    has_secure_password 
    validates :password, presence: true, length: { minimum: 10 }, allow_nil: true 

    # Returns the hash digest of the given string. 
    def User.digest(string) 
    cost = ActiveModel::SecurePassword.min_cost ? BCrypt::Engine::MIN_COST : 
                BCrypt::Engine.cost 
    BCrypt::Password.create(string, cost: cost) 
    end 

    # Returns a random token. 
    def User.new_token 
    SecureRandom.urlsafe_base64 
    end 

    # Remembers a user in the database for use in persistent sessions. 
    def remember 
    self.remember_token = User.new_token 
    update_attribute(:remember_digest, User.digest(remember_token)) 
    end 

    # Returns true if the given token matches the digest. 
    def authenticated?(attribute, token) 
    digest = send("#{attribute}_digest") 
    return false if digest.nil? 
    BCrypt::Password.new(digest).is_password?(token) 
    end 

    # Forgets a user. 
    def forget 
    update_attribute(:remember_digest, nil) 
    end 

    # Activates an account. 
    def activate 
    update_columns(activated: true, activated_at: Time.zone.now.to_datetime) 
    end 

    # Sends activation email. 
    def send_activation_email 
    UserMailer.account_activation(self).deliver_now 
    end 

    # Sets the password reset attributes. 
    def create_reset_digest 
    self.reset_token = User.new_token 
     update_columns(reset_digest: User.digest(reset_token), reset_sent_at: Time.zone.now) 
    end 

    # Sends password reset email. 
    def send_password_reset_email 
    UserMailer.password_reset(self).deliver_now 
    end 

    # Returns true if a password reset has expired. 
    def password_reset_expired? 
    reset_sent_at < 2.hours.ago 
    end 


    private 

    # Converts email to all lower-case. 
    def downcase_email 
     email.downcase! 
    end 

    # Creates and assigns the activation token and digest. 
    def create_activation_digest 
     self.activation_token = User.new_token 
     self.activation_digest = User.digest(activation_token) 
    end 
end 

user_controller

class UsersController < ApplicationController 
    before_action :logged_in_user, only: [:index, :edit, :update, :destroy] 
    before_action :correct_user, only: [:edit, :update] 
    before_action :admin_user,  only: :destroy 

    def index 
    @users = User.where(activated: true).paginate(page: params[:page]) 
    end 

    def show 
    @user = User.find(params[:id]) 
    redirect_to root_url and return unless @user.activated? 
    end 

    def new 
    @user = User.new 
    end 

    def create 
    @user = User.new(user_params) 
    if @user.save 
     @user.send_activation_email 
     flash[:info] = "Please check your email to activate your account." 
     redirect_to root_url 
    else 
     render 'new' 
    end 
    end 

    def edit 
    @user = User.find(params[:id]) 
    end 

    def update 
    @user = User.find(params[:id]) 
    if @user.update_attributes(user_params) 
     flash[:success] = "Profile updated" 
     redirect_to @user 
    else 
     render 'edit' 
    end 
    end def create 
    @user = User.new(user_params) 
    if @user.save 
     @user.send_activation_email 
     flash[:info] = "Please check your email to activate your account." 
     redirect_to root_url 



    def destroy 
    User.find(params[:id]).destroy 
    flash[:success] = "User deleted" 
    redirect_to users_url 
    end 

    private 

    def user_params 
     params.require(:user).permit(:name, :email, :password, :password_confirmation) 
    end 

    # Confirms a logged-in user. 
    def logged_in_user 
     unless logged_in? 
     flash[:danger] = "Please log in." 
     redirect_to login_url 
     end 
    end 

    # Confirms the correct user. 
    def correct_user 
     @user = User.find(params[:id]) 
     redirect_to(root_url) unless current_user?(@user) 
    end 

    # Confirms an admin user. 
    def admin_user 
     redirect_to(root_url) unless current_user.admin? 
    end 
end 

_form.html.erb

<%= form_for(@user) do |f| %> 
    <%= render 'shared/error_messages', object: @user %> 

    <%= f.label :name %> 
    <%= f.text_field :name, class: 'form-control' %> 

    <%= f.label :email %> 
    <%= f.email_field :email, class: 'form-control' %> 

    <%= f.label :password %> 
    <%= f.password_field :password, class: 'form-control' %> 

    <%= f.label :password_confirmation %> 
    <%= f.password_field :password_confirmation, class: 'form-control' %> 

    <%= f.submit yield(:button_text), class: "btn btn-primary" %> 
<% end %> 

new.html.erb

<% provide(:title, 'Sign up') %> 
<% provide(:button_text, 'Create my account') %> 
<h1>Sign up</h1> 
<div class="row"> 
    <div class="col-md-6 col-md-offset-3"> 
    <%= render 'form' %> 
    </div> 
</div> 

今、私が知ることから、create関数が呼び出されているときに、パラメータ（user_params）を@user変数に代入すると考えられるように感じます。

私が追加したuser.rbファイルの先頭にあるdevise行が原因だと強く思っていますが、その理由はわかりません。

Answer 1

User.digest関数で正しくないパラメータが渡されました。activation_tokenはself.activation_tokenです。

はuser.rbモデルで線の下に変更しよう：

self.activation_digest = User.digest(activation_token) 

self.activation_digest = User.digest(self.activation_token)