试图通过电子邮件找到一个用户获得"被叫id为nil"

Question

嗨,我正在进行重置密码操作.但点击按钮后我收到此错误:

被称为nil的id,错误地为4 - 如果你真的想要id为nil,请使用object_id

这是我的password_reset_controller

 class PasswordResetsController < ApplicationController

    layout "sessions"

  def new
  end

  def create
    user = User.find_by_email(params[:email])
    user.send_password_reset if user
    redirect_to root_url, :notice => "#{user.id}Las instrucciones para reestrablecer la contrasena fueron enviadas."
  end

end

这是我的用户模型

class User < ActiveRecord::Base
  attr_accessible :email, :password, :password_confirmation
  has_secure_password

  before_save { |user| user.email = email.downcase }
  before_save :create_remember_token

  VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
  validates :email, presence: true, format: { with: VALID_EMAIL_REGEX }, uniqueness: { case_sensitive: false }
  validates :password, presence: true, length: { minimum: 6 }
  validates :password_confirmation, presence: true

    def send_password_reset
        self.password_reset_token = SecureRandom.urlsafe_base64
        self.password_reset_at = Time.zone.now
        save!
    end

  private

    def create_remember_token
        self.remember_token = SecureRandom.urlsafe_base64
    end

end

这是观点:

<% provide(:title, "Reiniciar Password") %>

<div class="row">
    <div class="span4">
        &nbsp
    </div>
    <div class="span4" id="login-box">  
        <div id="login-controls">
            <%= link_to(image_tag("logo.png"), root_path) %>
            <br>
            <br>

            <%= form_for(:password_resets, url: password_resets_path) do |f| %>
                <%= f.text_field :email, :placeholder => "Correo Electronico", :tabindex => 1, :style => "height:25px;" %>
                <%= f.button "<i class=\"icon-lock icon-white\"></i> Reiniciar Password".html_safe, :tabindex => 2,  class: "btn btn-warning", :style => "width:220px;margin-bottom:5px;" %>
            <% end %>
      </div>
    </div>
    <div class="span4">
    </div>
</div>

我不知道为什么我找不到用户; 我尝试在rails控制台上做同样的事情,我可以通过电子邮件找到用户,但我可以生成password_reset_token.

我感谢你的帮助.

谢谢

Answer 1

使用params [:password_resets] [:email]

请看User.all,看看.检查您调用password_reset_token方法的用户记录

这意味着您的数据库中没有此电子邮件的用户.

使用,

user = User.find_by_email!(params[:email])

带爆炸(!)的方法会触发异常.find_by_email如果找不到电子邮件,则返回nil对象