paramが見つからないか、値が空です。プロジェクトを作成するためにビューをレンダリングしながら、「To Do」を追加するにはどうしたらいいですか？

Question

私は、ユーザーがプロジェクトを作成したときに、新しいタスクを追加することもできます。私はこの "解決策"を考え出しました。私は解決できないこのエラーに遭遇しました。

私はそれを知っていませんが、私はプロジェクトのコントローラとタスクのアクションを混ぜる "ルビー正しい"です。私はこのアプローチを取った理由は

これは私の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 

プロジェクトです..私はビューでそれを実行するためのソリューションを把握し、プロジェクトを保存することが作ることができなかったということです。 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を

task_params

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

で

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

及び方法を作成

のようでなければなりません