Rails/ Devise - 如何通过同一个表单创建用户和帖子

Question

我有一个名为 user 的设计模型。

我还有一个名为项目的模型。

我希望用户在创建用户帐户时创建一个项目。我的功能正常工作；但是，用户项目没有保存到数据库中。

这里是 projects_controller.rb

class ProjectsController < ApplicationController
  before_action :set_project, only: [:show, :edit, :update, :destroy]
  before_action :authenticate_user!
  # GET /projects
  # GET /projects.json
  def index
    @projects = current_user.projects
  end

  # GET /projects/1
  # GET /projects/1.json
  def show
  end

  # GET /projects/new
  def new
    @project = Project.new
  end

  # GET /projects/1/edit
  def edit
  end

  # POST /projects
  # POST /projects.json
  def create
    @project = Project.new(project_params)
    @project.user = current_user
    respond_to do |format|
      if @project.save
        format.html { redirect_to root_path, notice: 'Thanks! Your project has been saved. Please check your email inbox now.' }
        format.json { render :show, status: :created, location: @project }
      else
        format.html { render :new }
        format.json { render json: @project.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /projects/1
  # PATCH/PUT /projects/1.json
  def update
    respond_to do |format|
      if @project.update(project_params)
        format.html { redirect_to @project, notice: 'Project was successfully updated.' }
        format.json { render :show, status: :ok, location: @project }
      else
        format.html { render :edit }
        format.json { render json: @project.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /projects/1
  # DELETE /projects/1.json
  def destroy
    @project.destroy
    respond_to do |format|
      format.html { redirect_to projects_url, notice: 'Project was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_project
      @project = Project.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def project_params
      params.require(:project).permit(:service, :location, :details, :email)
    end
end

和用户.rb

class User < ActiveRecord::Base
  has_many :projects, :dependent => :destroy
  accepts_nested_attributes_for :projects, :reject_if => lambda { |a| a[:content].blank}, allow_destroy: true
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable,
         :confirmable, :lockable, :timeoutable
end

和项目模型

class Project < ActiveRecord::Base
  belongs_to :user
end

以及创建用户/他们的第一个帖子的表单

= form_for(resource, as: resource_name, url: registration_path(resource_name)) do |u|

  = devise_error_messages!

  = u.fields_for :project do |p|
    .field = p.text_field :service, placeholder: "What service do you need?"
    .field = p.text_field :location, placeholder: "What's the project location?"


  .field = u.email_field :email, autofocus: true, placeholder: "What's your email address?"

  .actions = u.submit "Click to continue"

关于如何让我的项目索引视图仅显示属于当前用户的帖子有什么想法吗？

Answer 1

由于您的用户模型 has_many 项目，您需要将表单修改为

 = u.fields_for :projects do |p|
   .field = p.text_field :service, placeholder: "What service do you need?"
   .field = p.text_field :location, placeholder: "What's the project location?"

并在您的应用程序控制器中添加 projects_attributes 到用户允许的参数中，为此使用一个块

before_action :configure_permitted_parameters, if: :devise_controller?

  protected

  def configure_permitted_parameters
    devise_parameter_sanitizer.for(:sign_up) do |u|
      u.permit(projects_attributes: [:service, :location])
    end
  end

更多信息请查看

http://apidock.com/rails/ActionView/Helpers/FormHelper/fields_for

https://github.com/plataformatec/devise/blob/7b33a8ef5749e0b593d785a1cd4787d2979cdee5/lib/devise/parameter_sanitizer.rb

Answer 2

当您创建帖子时，您并没有传递用户。您可以在保存之前传入用户：

@project = Project.new(params[:project])
@project.user = current_user

或者您可以根据关系创建帖子：

@project = current_user.posts.new(params[:project])

Answer 3

我从您的问题中怀疑您没有配置用户创建以允许您的嵌套项目参数。您似乎专注于 Project 控制器和代码，但您的用户将由 Devise::RegistrationsController 创建（除非您指定了自己的版本）。

您需要告诉设计您将允许用户创建哪些参数（请参阅Devise Strong Parameters）

你可能需要这样的东西：

class ApplicationController < ActionController::Base
  before_action :configure_permitted_parameters, if: :devise_controller?

  protected

  def configure_permitted_parameters
    devise_parameter_sanitizer.permit(:sign_up, keys: [project_attributes: [:service, :location]])
  end
end

或for devise 3:

def configure_permitted_parameters
  devise_parameter_sanitizer.for(:sign_up) << { project_attributes: [:service, :location] }
end