Rails 4 + Devise登录电子邮件或用户名和强大的参数 [英] Rails 4 + Devise Login with email or username and strong parameters

问题描述

我很喜欢RoR，并坚持这个设计问题。
我想允许用户使用电子邮件或用户名登录（用用户名注册已经可以）。

我遵循这些文章：
第1条和第2条，您可以看到以下结果：

application_controller.rb

  class ApplicationController< ActionController :: Base 
 protect_from_forgery with：：exception 
 before_filter：configure_permitted_pa​​rameters，如果：：devise_controller？ 
 
 protected 
 
 def configure_permitted_pa​​rameters 
 devise_parameter_sanitizer.for（：sign_up）{| u | u.permit（：username，：email，，password）} 
 devise_parameter_sanitizer.for（：sign_in）{| u | u.permit（：login，：password，：remember_me）} 
 end 
 end 
  

user.rb

  class User< ActiveRecord :: Base 
 devise：database_authenticatable，：可注册，：可恢复，可记忆，可追踪，可验证，：authentication_keys => [：login] 
 
 validates_uniqueness_of：username 
 validates_presence_of：username 
 validates：username，length：{in：4..20} 
 
 def self .find_first_by_auth_conditions（warden_conditions）
 conditions = warden_conditions.dup 
如果login = conditions.delete（：login）
其中（conditions）.where（[lower（username）=：value OR lower （email）=：value，{：value => login.downcase}]）首先
 else 
其中（条件）.first 
 end 
 end 
 end 
  

new.html.erb

 <％= form_for（resource，：as => resource_name，：url => session_path（resource_name））do | f | ％GT; 
< div><％= f.label：login，伪电子邮件％>< br /> 
<％= f.text_field：login，：autofocus => true％>< / div> 
 ... 
  

devise.rb

...
config.authentication_keys = [：login]
...

结果

 显示/home/action/workspace/rchq/app/views/devise/sessions/new.html.erb第5行上升的位置：
 
未定义的方法`login'for＃< User：0x000000033996a0> 
  

我不明白为什么它不起作用，因为我指定了sign_in许可证：

解决方案

问题在于login字段，删除：authentication_keys => ;在您的用户模型中添加
attr_accessor：login 。

I'm new to RoR and stuck with this devise problem. I want to allow users to sign in with email OR username (registration with username is already ok).

I followed these articles: Article 1 and Article 2 and you can see the result below:

application_controller.rb

class ApplicationController < ActionController::Base
  protect_from_forgery with: :exception
  before_filter :configure_permitted_parameters, if: :devise_controller?

  protected

  def configure_permitted_parameters
    devise_parameter_sanitizer.for(:sign_up) { |u| u.permit(:username, :email, :password) }
    devise_parameter_sanitizer.for(:sign_in) { |u| u.permit(:login, :password, :remember_me) }
  end
end

user.rb

class User < ActiveRecord::Base
    devise :database_authenticatable, :registerable, :recoverable, :rememberable, :trackable, :validatable, :authentication_keys => [:login]

  validates_uniqueness_of :username
  validates_presence_of :username
  validates :username, length: { in: 4..20 }

  def self.find_first_by_auth_conditions(warden_conditions)
    conditions = warden_conditions.dup
    if login = conditions.delete(:login)
      where(conditions).where(["lower(username) = :value OR lower(email) = :value", { :value => login.downcase }]).first
    else
      where(conditions).first
    end
  end      
end

new.html.erb

<%= form_for(resource, :as => resource_name, :url => session_path(resource_name)) do |f| %>
  <div><%= f.label :login, "Pseudo ou email" %><br />
  <%= f.text_field :login, :autofocus => true %></div>
...

devise.rb

... config.authentication_keys = [ :login ] ...

result

Showing /home/action/workspace/rchq/app/views/devise/sessions/new.html.erb where line #5 raised:

undefined method `login' for #<User:0x000000033996a0>

I don't understand why it doesn't work because I specified that for "sign_in" permit :login for User.

解决方案

The problem is with the field "login", remove :authentication_keys => [:login] and add attr_accessor :login in your User model.

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