我是 RoR 的新手，遇到了这个设计问题。我想允许用户使用电子邮件或用户名登录（使用用户名注册已经可以了）。
我关注了这些文章： 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_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
用户.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
新的.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>
...
设计.rb
... config.authentication_keys = [ :login ] ...
结果
Showing /home/action/workspace/rchq/app/views/devise/sessions/new.html.erb where line #5 raised:
undefined method `login' for #<User:0x000000033996a0>
我不明白为什么它不起作用，因为我为“sign_in”指定了允许：用户登录。