发布实体时注册用户

Question

Rails 4 +设计。

想象一下，我们有一些实体形式。有用户字段名称，电子邮件，未登录用户的密码和实体中的少数字段（对于已登录的用户，没有名称/电子邮件/密码字段）。换句话说，我需要将两个动作（注册和发布问题）合二为一。如何在后端（控制器）内解决这个问题？

UPD 从控制器/视图添加了一些代码，但不认为它会有所帮助。

questions_controller.rb

class QuestionsController < ApplicationController

  def index
    @questions = Question.all
  end

  def new
    @user = User.new unless user_signed_in?
    @question = Question.new

    render "new"
  end
end

new.html.slim

= form_for @question do |f| # Don't know how to combine form for user and question
  - unless user_signed_in?
    = text_field @user, :name
    = text_field @user, :email
    = text_field @user, :password
  = f.text_field :title
  = f.text_area :summary

Answer 1

在QuestionsController中，您可以先设置一些逻辑来创建用户，然后使用创建的用户登录。最后处理问题的创建。

def create
  # Permit the strong parameters as you're using rails 4
  params.require(:question).permit(:title, :summary)
  params.require(:user).permit(:name, :email, :password)

  logged_in = false #initialize a logged_in flag
  if user_signed_in?
    logged_in = true #set the flag to true if logged in.
  else
    @user = User.new(params[:user])
    if @user.save
      sign_in(@user) #sign in the user if the creation was a success
      logged_in = true #set the flag to true if the user created.
    end
  end

  if logged_in
    @question = current_user.questions.new(params[:question])

    if @question.save
      redirect_to questions_path #put in your logic after successful creation of question
    else
      render :new
    end
  else
    render :new
  end

end

您需要更改new.html.slim以构建我们上面使用的确切参数。

= form_for @question do |f|
 - unless user_signed_in?
   = text_field :user, :name
   = text_field :user, :email
   = text_field :user, :password
 = f.text_field :title
 = f.text_area :summary

Answer 2

您可以使用rails nested attributes接受参数。 在User和Question模型之间添加嵌套属性关系

class QuestionsController < ApplicationController

  def new
    @user = current_user || User.new 
    @question = @user.questions.new

    render "new"
  end

  def create
    user_params = params['user']
    question_params = user_params.delete('questions_attributes')['0']
    @user = current_user || User.new(user_params)
    @question = @user.questions.new(question_params)
    if @user.valid? && @question.valid?
      @user.save && @question.save
      sign_in(@user)
      redirect_to :index
    else
      render 'new'
    end
  end

end


= form_for @user do |user|
  - unless user_signed_in?
    = user.text_field :name
    = user.text_field :email
    = user.text_field :password
  = user.fields_for :questions do |question|
    = question.text_field :title
    = question.text_area :summary