设计：允许用户注册为“UsErNaMe”但是用“用户名” [英] Devise: Allow users to register as "UsErNaMe" but login with "username"

问题描述

以同样的方式，大多数网站都可以在数据库中存储UsErNaMe，但让用户使用username登录。

这是一个相当明显的和必要的功能，并且大量的人似乎已经问了，但是我保持绊倒的解决方案似乎与Devise自己的文档断开连接。

例如，考虑这个博文： http://anti-pattern.com/2011/5/16/case -inensitive-keys-with-devise

[...]你可能遇到了一些用户的问题喜欢在他们的登录（电子邮件和/或用户名）中键入
某些字母大写，
，但希望在尝试登录时不区分大小写。不是
不合理的请求[ ...]

很酷！这就是我想要的。

他的解决方案：

 ＃config / initializer / devise.rb 
 Devise.setup do | config | 
 config.case_insensitive_keys = [：email，，username] 
 end 
  

我一直在找的解决方案。但是以下是该配置选项的文档：

 ＃配置哪些验证密钥不区分大小写。 
＃这些键将在创建或修改用户时使用
＃来进行身份验证或查找用户。默认是：电子邮件。 
 config.case_insensitive_keys = [：username，：email] 
  

特别是：这些键将在创建/修改用户后下载。换句话说，数据库中的用户名正在缩减。

要验证：

 code> User.create用户名：UsErNaMe，密码：secret，电子邮件：[e-mail]
＃=> < User username =username...> 
  

我错过了一些令人痛苦的事情吗？

解决方案

从 devise wiki ：您需要在模型中覆盖devise的 find_first_by_auth_conditions 方法。

ActiveRecord示例：

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

如果您不需要电子邮件，也可以删除或更低（电子邮件）=：value 部分。

这样你不需要在 case_inse中列出 username nsitive_keys ，它不会在数据库中下载。

In the same way most websites work, I was to store "UsErNaMe" in the database but let users login with "username".

This is a fairly obvious and necessary feature, and plenty of people seem to have asked it, but the solution I keep stumbling upon seems disconnected from Devise's own documentation.

For instance, consider this blog post: http://anti-pattern.com/2011/5/16/case-insensitive-keys-with-devise

[...]you’ve probably run into the problem that some users like to type certain letters in their logins (email and/or username) in uppercase, but expect it to be case-insensitive when they try to sign in. A not unreasonable request[...]

Cool! That's what I want.

His solution:

# config/initializers/devise.rb
Devise.setup do |config|
  config.case_insensitive_keys = [:email, :username]
end

That's the solution I keep finding. But here's the documentation for that config option:

# Configure which authentication keys should be case-insensitive.
# These keys will be downcased upon creating or modifying a user and when used
# to authenticate or find a user. Default is :email.
config.case_insensitive_keys = [ :username, :email ]

In particular: "These keys will be downcased upon creating/modifying a user." In other words, the username is being downcased in the database.

To verify:

User.create username: "UsErNaMe", password: "secret", email: "[e-mail]"
#=> <User username="username"...>

Am I missing something painfully obvious?

解决方案

From devise wiki: you need to overwrite devise's find_first_by_auth_conditions method in your model.

ActiveRecord example:

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

You can remove OR lower(email) = :value part if you don't need auth by email too.

That way you don't need to list username in case_insensitive_keys and it wouldn't be downcased in the database.

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