chartkickでeach文で取り出した値をまとめてグラフにしたい

前提・実現したいこと

現在、railsにてカレンダーのアプリを作成しているのですが、
each文で取り出した値をまとめてchartkickのtimelineのグラフにしたいのですが、どうすればいいかわかりません。

何卒、よろしくお願いいたします

該当のソースコード

index.html.erb

html
1<div class="text text03">
2<%= calendar number_of_days: 1, events:  @attendances do |date, attendances| %>
3<%= link_to daytimes_url, class: "navbar-item" do %>
4  <div class="title is-5"> <%= date.day %></div>
5  <% end %>
6
7  <% attendances.each do |attendance| %>
8    <div>
9      <%= link_to attendance.user.username, attendance %>
10      <%= link_to attendance.start_time.strftime("%Y-%m-%d %H:%M"), attendance %>
11      <%= link_to attendance.last_time.strftime("%Y-%m-%d %H:%M"), attendance %>
12      <%= timeline [
13  [attendance.user.username, attendance.start_time, attendance.last_time]
14] %>
15    </div>
16  <% end %>

routes.rb

ruby
1Rails.application.routes.draw do
2  get 'searches',to: "searches#index"
3  mount RailsAdmin::Engine => '/admin', as: 'rails_admin'
4  devise_for :users, controllers: {
5   omniauth_callbacks: 'users/omniauth_callbacks',
6   registrations: 'users/registrations'
7  }
8  post '/callback' => 'linebot#callback'
9  get 'homes/index'
10  resources :homes, only: [:index]
11  root to: 'home#index'
12  resources :users 
13  resources :attendances
14  resources :daytimes
15  resources :restaurants, only: [:index, :show] 
16  resources :searches do
17    collection do
18      get 'search'
19    end
20  end
21  namespace :admin do
22    resources :restaurants, only: [:index, :new, :create, :show,  :edit, :destroy]
23  end
24end
25  
26

attendances_controller.rb

ruby
1class AttendancesController < ApplicationController
2  before_action :authenticate_user!, except: [:index]
3
4    def index
5      @attendances = Attendance.all
6    end
7    
8    
9    def new
10      @attendance = Attendance.new
11    end
12  
13    def show
14      @attendance = Attendance.find(params[:id])
15    end
16  
17    def create  
18      @attendance = Attendance.new(attendance_params)
19      @attendance.user_id = current_user.id
20      @attendance.save
21      redirect_to attendances_path(@attendance)
22    end
23  
24    def destroy
25      @attendance = Attendance.find(params[:id])
26      if @attendance.user != current_user
27        redirect_to attendances_path, alert: "不正なアクセスです"
28      else
29        @attendance.destroy
30        redirect_to attendances_path, notice:"削除しました"
31      end
32    end
33  
34    def edit
35      @attendance = Attendance.find(params[:id])
36      if @attendance.user != current_user
37        redirect_to attendances_path, alert: "不正なアクセスです"
38      end
39      
40    end
41  
42    def update
43      @attendance = Attendance.find(params[:id])
44      if @attendance.update(attendance_params)
45        redirect_to attendances_path(@attendance), notice: "更新しました"
46      else
47        render 'edit'
48      end
49    end
50  
51    private
52  
53    def attendance_params
54        params.require(:attendance).permit(:title, :content, :start_time, :last_time, :username)
55
56    end
57  
58end
59

attendance.js

js
1document.addEventListener("turbolinks:load"
2,function() {
3  $('[name="btn"]:radio').change( function() {
4    if($('[id=a]').prop('checked')){
5      $('.text').fadeOut();
6      $('.text01').fadeIn();
7    } else if ($('[id=b]').prop('checked')) {
8      $('.text').fadeOut();
9      $('.text02').fadeIn();
10    } else if ($('[id=c]').prop('checked')) {
11      $('.text').fadeOut();
12      $('.text03').fadeIn();
13    } 
14  });
15});