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micropostのカウント備忘録

Posted at

###解決したい問題
投稿したmicropostの数をカウントしたいがエラーが起きる。ちなみに、user.controllerでは正常に使えているよう。

###コード
全てのコントローラでmicropostのカウントメソッドを使うことができるよう、application.controllerに書いている。

application.controller
class ApplicationController < ActionController::Base
    include SessionsHelper
    
  private

  def require_user_logged_in
    unless logged_in?
      redirect_to login_url
    end
  end
  
  def counts(user)
    @count_microposts = user.microposts.count
  end
  
end

micropostのindexでmicropostカウントメソッドを使いたいのでindexメソッドにcounts(@user)を追加した。

micropost.controller
class MicropostsController < ApplicationController
  
  before_action :require_user_logged_in
  before_action :correct_user, only: [:edit,:update,:destroy,:show]
  
  def index 
    @microposts = current_user.microposts.order(id: :desc).page(params[:page]).per(10)
    counts(@user)
  end
  
  def update
    @micropost = Micropost.find(params[:id])

    if @micropost.update(micropost_params)
      flash[:success] = '保存されました。'
      redirect_to @micropost
    else
      flash.now[:danger] = '保存されませんでした。'
      render :edit
    end
  end
  
  def edit
    @micropost = Micropost.find(params[:id])
  end
  
  def show 
    @micropost=Micropost.find(params[:id])
  end
  
  def create
    @micropost = current_user.microposts.build(micropost_params)
    if @micropost.save
      flash[:success] = '記事を投稿しました。'
      redirect_to root_url
    else
      @microposts = current_user.microposts.order(id: :desc).page(params[:page])
      flash.now[:danger] = '記事を投稿できませんでした。'
      render 'toppages/index'
    end
  end

  def destroy
    @micropost.destroy
    flash[:success] = '記事を削除しました。'
    redirect_back(fallback_location: microposts_path)
    
  end
  
   private

  def micropost_params
    params.require(:micropost).permit(:content,:title)
  end
  
  def correct_user
    @micropost = current_user.microposts.find_by(id: params[:id])
    unless @micropost
      redirect_to microposts_path
    end
  end

end
class MicropostsController < ApplicationController
  
  before_action :require_user_logged_in
  before_action :correct_user, only: [:edit,:update,:destroy,:show]
  
  def index 
    @microposts = current_user.microposts.order(id: :desc).page(params[:page]).per(10)
    counts(@micropost)
  end
  
  def update
    @micropost = Micropost.find(params[:id])

    if @micropost.update(micropost_params)
      flash[:success] = '保存されました。'
      redirect_to @micropost
    else
      flash.now[:danger] = '保存されませんでした。'
      render :edit
    end
  end
  
  def edit
    @micropost = Micropost.find(params[:id])
  end
  
  def show 
    @micropost=Micropost.find(params[:id])
  end
  
  def create
    @micropost = current_user.microposts.build(micropost_params)
    if @micropost.save
      flash[:success] = '記事を投稿しました。'
      redirect_to root_url
    else
      @microposts = current_user.microposts.order(id: :desc).page(params[:page])
      flash.now[:danger] = '記事を投稿できませんでした。'
      render 'toppages/index'
    end
  end

  def destroy
    @micropost.destroy
    flash[:success] = '記事を削除しました。'
    redirect_back(fallback_location: microposts_path)
    
  end
  
   private

  def micropost_params
    params.require(:micropost).permit(:content,:title)
  end
  
  def correct_user
    @micropost = current_user.microposts.find_by(id: params[:id])
    unless @micropost
      redirect_to microposts_path
    end
  end
end
microposts/index.html.erb
<h3>記事一覧:<span class="badge badge-secondary"><%= @count_microposts %>件</span></h3>
<%= render 'microposts/microposts', microposts: @microposts %>

###解決した方法
application.controllerの
@count_microposts = user.microposts.count@count_microposts = current_user.microposts.countにしたところ解決した。

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