ruby-on-rails - ActionController::ParameterMissing(参数缺失或值为空:名称):

Question

在为 Ruby on Rails 应用程序实现我认为是简单的注册/登录 系统时，结果与教程中显示的不符。

我正在尝试使用 bcrypt 进行身份验证，并使用 PostgreSQL 进行数据库。

我不断收到“ActionController::ParameterMissing(缺少参数或值为空:name):”，即使它显示输入的是 name。 '"users"=>{"name"=>"asdf", "password"=>"Qq!1asdfasdf", "password_confirmation"=>"Qq!1asdfasdf"}, "commit"=>"提交"}(0.1 毫秒)

output from the console when attempting to sign in

用户 Controller

class UsersController < ApplicationController


def new
end

def create
  user = User.new(
    name: params[:name],
    password: params[:password],
    password_confirmation: params[:password_confirmation])
  if user.save
    session[:user_id] = user.id
    redirect_to '/'
  else
    redirect_to '/signup'
  end
end

private

end

表格

class UsersController < ApplicationController


def new
end

def create
  user = User.new(
    name: params[:name],
    password: params[:password],
    password_confirmation: params[:password_confirmation])
  if user.save
    session[:user_id] = user.id
    redirect_to '/'
  else
    redirect_to '/signup'
  end
end

private

end

和注册表单

class UsersController < ApplicationController


def new
end

def create
  user = User.new(
    name: params[:name],
    password: params[:password],
    password_confirmation: params[:password_confirmation])
  if user.save
    session[:user_id] = user.id
    redirect_to '/'
  else
    redirect_to '/signup'
  end
end

private

end

用户模型

class User < ActiveRecord::Base


    PASSWORD_FORMAT = /\A
    (?=.{10,})          # Must contain 10 or more characters
    (?=.*\d)           # Must contain a digit
    (?=.*[a-z])        # Must contain a lower case character
    (?=.*[A-Z])        # Must contain an upper case character
    (?=.*[[:^alnum:]]) # Must contain a symbol
    /x

    #formatting for password

    USERNAME_FORMAT = /\A[a-z0-9A-Z\-_]{2,15}\z/ #Can contain lowercase and upercase letters, numbers, - and _, must be between 2 and 15 length

    #username formatting

    validates :name,
    :presence => true,
    :uniqueness => true,
    :format => USERNAME_FORMAT

    validates :password, 
    :presence => true, 
    :format => PASSWORD_FORMAT,
    :confirmation => true, 
    :on  => create 

  has_secure_password
end

我已尝试故障排除，所有类似的问题都没有得到答案或修复。

编辑:问题更清晰

Answer 1

您需要使用 rails Strong Parameter喜欢下面的

class UsersController < ApplicationController

    def new
    end

    def create
      user = User.new(user_params)
      if user.save
        session[:user_id] = user.id
        redirect_to root_path
      else
        redirect_to new_user_path
      end
    end

    private

    def user_params
        params.require(:user).permit(:name, :password, :password_confirmation)
    end

end