ROR：undefined method`authenticate'

Question

我想在我的rails應用程序中添加'更改密碼'功能，我從這裏研究它（207.44.138.58/~rorexper/viewtopic.php?t=690 & highlight = & sid = 16f7417dcbb3cb8960912c8134351fd9）

在我看來，我頁補充： -

= form_tag :action => 'update' do 
    - flash.each do |key, value| 
    %div.TxtRed{:class => "flash #{key}"}= value 
    %p 
    %label Current password 
    %br 
    = password_field_tag "user[current_password]", nil 
    %p 
    %label New password 
    %br 
    = password_field_tag "user[password]", nil 
    %p 
    %label Confirm password 
    %br 
    = password_field_tag "user[password_confirmation]", nil 
    %P 
    = button_tag "Save", :class => "btn-custom ML10", :type => :submit 

並在控制器： -

def update 
    return unless request.post? 
    @user = Refinery::User.find_by_id(current_user.id) 
    if current_user = Refinery::User.authenticate(@user.username, params[:user][:current_password]) 

     if (params[:user][:password] == params[:user][:password_confirmation]) 

      current_user.encrypted_password = crypted_password(params[:user] [:password] ,current_user.salt) 

      flash[:notice] = current_user.save ?"Password changed" :"Password not changed" 
      redirect_to my_page_path 

     else 

      flash[:notice] = "Password mismatch" 
      @current_password = params[:current_password] 

     end 

    else 

     flash[:notice] = "Wrong password" 

    end 
end 

def crypted_password(password, salt) 
    string_to_hash = password + "nyros" + salt 
    Digest::SHA1.hexdigest(string_to_hash) 
end 

但它不能正常工作並給出了一個錯誤： 「未定義的方法`驗證'爲＃」

Answer 1

如果從其調用的對象爲零，則authenticate方法將引發異常。換句話說，find_by未找到匹配的用戶。

在if結構的條件下測試@user不是零，而不是在if條件中調用authenticate方法。所以改變：

@user = Refinery::User.find_by_id(current_user.id) 
if !@user.nil? 
    current_user = Refinery::User.authenticate(@user.username, params[:user][:current_password]) 
. 
. 
. 

到

@user = Refinery::User.find_by_id(current_user.id) 
current_user = Refinery::User.authenticate(@user.username, params[:user][:current_password])