Railscasts：从头开始进行身份验证 - Rails 4 中缺少 :session 参数问题

Question

我正在 Railscast: authentication from scratch in Rails 4，尽管本教程是为 Rails 3 构建的. 因此，必须对原始教程说明进行一些更改。

教程：http://railscasts.com/episodes/250-authentication-from-scratch?autoplay=true

当前运行进入错误

param is missing or the value is empty: session

想法：

我比较了下面的 2 个控制器。我对教程的更改是将参数移动到 session_params 方法中。
我知道这个错误是因为被 posted 的散列不包含像 "session" => { } 这样的散列。但是我对Rails的理解还不够深入，无法解决。

推荐控制器(rails3)

def create
  user = User.authenticate(params[:email], params[:password])
  if user
    session[:user_id] = user.id
    redirect_to root_url, :notice => "Logged in!"
  else
    flash.now.alert = "Invalid email or password"
    render "new"
  end
end

我的控制器（转换为Rails 4）

  def create
    user = User.authenticate(session_params)
    if user
      session[:user_id] = user.id
      redirect_to root_url, :notice => "Logged in!"
    else
      flash.now.alert = "Invalid email or password"
      render "new"
    end
  end

  private
  def session_params
    params.require(:session).permit(:email, :password)
  end

到目前为止，我只使用 Devise 进行身份验证，如果您能分享任何建议，在此先感谢您。

更新

根据要求，形成 post 会话

<h1>Log in</h1>
<%= form_tag sessions_path do %>
    <p>
        <%= label_tag :email %> <br/>
        <%= text_field_tag :email, params[:email] %>
    </p>
    <p>
        <%= label_tag :password %> <br/>
        <%= password_field_tag :password %>
    </p>
    <p class="button"> <%= submit_tag %> </p>
<% end %>

更新 2

同时添加 user.rb 型号

class User < ActiveRecord::Base
    attr_accessor :password
    before_save :encrypt_password

    validates_confirmation_of :password
    validates_presence_of :password, :on => :create
    validates_presence_of :email
    validates_uniqueness_of :email

    def self.authenticate(email, password)
        user = find_by_email(email)
        if user && user.password_hash == BCrypt::Engine.hash_secret(password, password_salt)
            user
        end
    end

    def encrypt_password
        if password.present?
            self.password_salt = BCrypt::Engine.generate_salt
            self.password_hash = BCrypt::Engine.hash_secret(password, password_salt)
        end
    end
end

Answer 1

试试这个：

在sessions_controller.rb

def create
    @user = User.find_by(email: params[:session][:email].downcase)
    if @user && @user.authenticate(params[:session][:password])
        session[:user_id] = @user.id
        flash[:success] = "#{@user.email}, Successfully Logged In"
        redirect_to root_url, :notice => "Logged in!"
    else
        flash.now[:danger] = "Incorrect User/Password"
        render 'new'
    end
end

html形式

<%= form_for :session, url: :sessions do |f| %>

    <div class="field">
        <%= f.label :email %>
        <%= f.email_field :email %>
    </div>

    <div class="field">
        <%= f.label :password %>
        <%= f.password_field :password %>
    </div>

    <%= f.submit "Sign In", class: "button" %>
<% end %>

routes.rb

post 'sessions'  => 'sessions#create'

User.rb

class User < ActiveRecord::Base
    has_secure_password

    validates_confirmation_of :password
    validates_presence_of :password, :on => :create
    validates_presence_of :email
    validates_uniqueness_of :email

end

Railscasts：从头开始进行身份验证 - Rails 4 中缺少 :session 参数问题

Railscasts: authentication from scratch - missing :session param issue in Rails 4

ruby-on-rails

authentication

railscasts