参数缺失或值为空：任务。如何在渲染视图的同时添加 "To Do" 以创建项目？

Question

我希望当用户创建项目时 s/he 也可以向其中添加新任务。这个我已经想通了 "solution" 并且我遇到了这个我无法解决的错误。

我什至不知道 "ruby correct" 我将任务操作与项目控制器混合在一起。我采用这种方法的原因是我无法在视图中找到这样做的解决方案并使项目得以保存..

这是我的projects_controler.rb

  class ProjectsController < ApplicationController
  before_action :set_project, only: [:show, :edit, :update, :destroy]
  before_action :authenticate_user!

  def create
    @project = Project.new(project_params)
    @task = Task.new(task_params)

    respond_to do |format|
      if @project.save and @task.save
        format.html { redirect_to @project, notice: 'Project was successfully created.' }
        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
    # @list = List.find(params[:id])
    @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(:title, :description, :done, :user_id)
    end



    def set_task
      @task = Task.find(params[:id])
    end

    def task_params
      params.require(:task).permit(:title, :done, :project_id)
    end
end

project.rb

class Project < ApplicationRecord
  belongs_to :user, foreign_key: "user_id"
  has_many :tasks , dependent: :destroy
  validates_presence_of :user
  validates_uniqueness_of :title, on: :create, message: "must be unique"
  validates :title, presence: true, length: { minimum: 2 }

    def done_tasks
     tasks.where(done: true).order("updated_at DESC")
  end
end

task.rb

class Task < ApplicationRecord
  belongs_to :project, foreign_key: "project_id"#, class_name: "List"
  validates_presence_of :title

  def completed?
    !completed_at.blank?
  end 
end

routes.rb

Rails.application.routes.draw do

  devise_for :users, :controllers => { :omniauth_callbacks => "users/omniauth_callbacks" }

    resources :projects do
        resources :tasks
    end


  authenticated :user do
    root to: 'projects#index'
  end
  unauthenticated :user do
    root 'welcome#home'
  end
end

new.html.erb

<h1>New Project</h1>

<%= render 'form', project: @project, task: @task %>
<%# render 'form', project: @project, task: @task %>

  <!-- custom -->
  <!-- shall I ADD ID TO THE projrct t be trackable by the task????? and describe that in task.rb -->
  <!-- <h1>Tasks</h1> -->
  <%# f.button %>
<!-- button to add a new task -->
<%# f.button "add a new task to the current project" %>

<!-- if else mechanism for adding a new task via a button  -->
<!-- when button pressed, tasks/_form will appear down here -->
<!-- button to save the task while at the same moment  .....  override "create task" and "create project" to save "save project to task" -->

<%# render '../tasks/_form' %>

<%= link_to 'Back', projects_path %>

_form.html.erb

<%= simple_form_for(@project, @task) do |f| %>
<%# form_for([@post, @comment]) do |f| %>

  <% f.error_notification %>

  <div class="form-inputs">
    <%= f.input :title %>
    <%= f.input :description %>
    <%= f.input :done %>
    <%= f.association :user %>
  </div>



  <div class="form-actions">
    <%= f.button :submit %>
  </div>
<% end %>

Answer 1

在task_params

params.require(:task).permit(:title, :done)

创建方法应该像

def create
  @project = Project.new(project_params)
  @project.tasks.build(task_params)

  respond_to do |format|
    if @project.save and @task.save
      format.html { redirect_to @project, notice: 'Project was successfully created.' }
      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