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README

A simple application to experiment with Turbo.

Setup

This application uses:

  • ruby 3.3.0
  • sqlite 3
  • redis

Have them installed, clone repo and run:

$ bundle
$ rails db:setup

You can run rails db:seed many times to have more data.

Use rails s to run the server.

Testing

Run $ rspec for tests.

Run $ rubocop for linter check.

Knowledge base

Turbo Drive

Links:

https://hotwired.dev/ https://turbo.hotwired.dev/handbook/drive

Task 1

  • go to any web page
  • analyse content of Network tab in Inspector during navigating through sub-pages
  • run workshop app with rails s
  • analyse content of Network tab in Inspector during navigating through sub-pages
  • add at the bottom of app/javascript/application.js
Turbo.session.drive = false
  • analyse content of Network tab in Inspector during navigating through sub-pages

Turbo Frames

Links:

https://turbo.hotwired.dev/handbook/frames https://rubydoc.info/github/hotwired/turbo-rails/Turbo%2FFramesHelper:turbo_frame_tag https://apidock.com/rails/ActionView/RecordIdentifier/dom_id

Task 1: edit in place for cards

Add turbo frames for cards to enable edit in place

  1. Update app/views/cards/_card.html.erb - wrap all the code into turbo frame tag block:

    Updated file: 
    <%= turbo_frame_tag dom_id(card) do %>
    <div class="card card-body">
        <div class="d-flex justify-content-between align-items-center mb-2">
        <h5 class="card-title mb-0">
            <%= card.title %>
        </h5>
        <div class="d-flex gap-2">
            <%= link_to edit_card_path(card), class: 'text-default' do %>
            <i class="fa-solid fa-pencil"></i>
            <% end %>
            <%= link_to card_path(card), data: { turbo_method: :delete, turbo_confirm: 'Are you sure?' }, class: 'text-danger' do %>
            <i class="fa-solid fa-trash"></i>
            <% end %>
        </div>
        </div>
        <div class="card-text text-primary-grey-600">
            <%= card.description %>
        </div>
    </div>
<% end %>

  1. Update app/views/cards/edit.html.erb - wrap ‘form’ into turbo frame tag block:

    Updated file: 
    <h1 class="text-primary-dark-500">Edit Card</h1>

<div class="row w-100 justify-content-center mt-3">
    <%= turbo_frame_tag dom_id(@card) do %>
    <div class="border border-primary-grey-200 bg-light p-2">
        <%= render 'form' %>
    </div>
    <% end %>
</div>

Task 2: edit in place for board columns

Add turbo frames to board column headers to edit column names in place

  1. Update app/views/board_columns/_column_header.html.erb - wrap all the code into turbo frame tag block:

    Updated file: 
    <%= turbo_frame_tag dom_id(board_column, :edit) do %>
<div class="d-flex flex-row">
    <h5 class="d-flex flex-col">
    <%= board_column.name %>
    </h5>
    <div class="d-flex flex-col ms-auto gap-2">
        <%= link_to edit_board_column_path(board_column) do %>
        <div class="fa-solid fa-pencil text-primary-dark-600"></div>
        <% end %>
        <%= link_to board_column_path(board_column), data: { turbo_method: :delete, turbo_confirm: 'Are you sure?' } do %>
        <div class="fa-solid fa-trash text-primary-dark-600"></div>
        <% end %>
    </div>
</div>
<% end %>

  1. Update app/views/board_columns/edit.html.erb - wrap ‘form’ into turbo frame tag block:

    Updated file: 
    <h1 class="text-primary-dark-500">Edit Board Column</h1>

<div class="row w-100 justify-content-center mt-3">
<%= turbo_frame_tag dom_id(@board_column, :edit) do %>
    <div class="border border-primary-grey-200 bg-light p-2">
    <%= render 'form' %>
    </div>
<% end %>
</div>

Task 3: edit in place for boards

Add turbo frames to board headers to edit board name in place

  1. Update app/views/boards/index.html.erb - wrap .card-header into turbo frame tag block (line 17):

    Updated file: 
    <div class="row w-100">
<div class="d-flex justify-content-between">
    <%= link_to 'New Board', new_board_path, class: 'btn btn-outline-primary invisible' %>
    <h1 class="text-primary-dark-500">
    Boards
    </h1>
    <div>
    <%= link_to 'New Board', new_board_path, class: 'btn btn-outline-primary' %>
    </div>
</div>
</div>

<div class="row w-100">
<% @boards.each do |board| %>
    <div class="col-3 my-3">
    <div class="card border border-primary-grey-200">
        <%= turbo_frame_tag dom_id(board, :edit) do %>
        <div class="card-header bg-primary-grey-200">
            <div class="d-flex justify-content-between align-items-center">
            <h5 class="card-title mb-0">
                <%= link_to board.name, board, class: 'link-underline link-underline-opacity-0' %>
            </h5>
            <div class="d-flex gap-2">
                <%= link_to edit_board_path(board), class: 'text-default' do %>
                <i class="fa-solid fa-pencil text-primary-dark-600"></i>
                <% end %>
                <%= link_to board, data: { turbo_method: :delete, turbo_confirm: 'Are you sure?' }, class: 'text-danger' do %>
                <i class="fa-solid fa-trash text-primary-dark-600"></i>
                <% end %>
            </div>
            </div>
        </div>
        <% end %>
        <div class="card-body bg-primary-grey-100">
        <div class="card-text">
            <p>
            <%= "Columns: #{board.board_columns.size}" %>
            </p>
            <p>
            <%= "Cards: #{board.board_columns.joins(:cards).count}" %>
            </p>
        </div>
        </div>
    </div>
    </div>
<% end %>
</div>

  1. Update app/views/boards/edit.html.erb - wrap ‘form’ into turbo frame tag block:

    Updated file: 
    <h1 class="text-primary-dark-500">Edit Board</h1>

<div class="row w-100 justify-content-center mt-3">
<%= turbo_frame_tag dom_id(@board, :edit) do %>
    <div class="border border-primary-grey-200 bg-light p-2">
    <%= render 'form' %>
    </div>
<% end %>
</div>

Branch with all edits-in-place: git checkout turbo-frames-edits

Task 4: Fix show board link

  1. Update app/views/boards/index.html.erb - add data: { turbo_frame: '_top' } to show link:

    Updated file: 
    <h5 class="card-title mb-0">
    <%= link_to board.name, board, data: { turbo_frame: '_top'}, class: 'link-underline link-underline-opacity-0' %>
</h5>

Branch with fixed link: git checkout turbo-frames-top

Turbo Streams

Links:

https://turbo.hotwired.dev/handbook/streams

Task 1: Fix deleting cards

  1. Update app/controllers/cards_controller.rb#destroy - add turbo stream format response

    Updated file: 
    respond_to do |format|
  format.html { redirect_to board_url(board), notice: "Card was successfully destroyed." }
  format.turbo_stream
end

  1. Create app/views/cards/destroy.turbo_stream.erb

    Updated file: 
    <%= turbo_stream.remove dom_id(@card) %>

Task 2: Fix deleting board columns

  1. Update app/controllers/board_columns_controller.rb#destroy - add turbo stream format response with inline turbo stream render

    Updated file: 
    respond_to do |format|
  format.html { redirect_to board_url(board), notice: "BoardColumn was successfully destroyed." }
  format.turbo_stream { render turbo_stream: turbo_stream.remove(@board_column) }
end

  1. Update app/views/board_columns/_board_column.html.erb - add unique ID for board columns:

    Updated file: 
    <div id= <%= dom_id(board_column)%> class="board-column" data-sortable-column-id-value="<%= board_column.id %>">
<%= render partial: 'board_columns/column_header', locals: { board_column: board_column } %>

<div id= <%= dom_id(board_column, :column_body) %>, class="board-column-body", data-sortable-target="cardsContainer">
    <% board_column.cards.order(:position).each do |card| %>
    <div class="draggable_card my-1" data-sortable-id="<%= card.id %>">
        <%= render partial: 'cards/card', locals: { card: card } %>
    </div>
    <% end %>
</div>

<div class="board-column-footer">
    <%= link_to new_card_url(board_column_id: board_column.id), class: 'text-success fs-2' do %>
    <div class="fa-solid fa-plus"></div>
    <% end %>
</div>
</div>

Task 3: Fix deleting boards

  1. Update app/controllers/boards_controller.rb#destroy - add turbo stream format response with inline turbo stream render

    Updated file: 
    def destroy
    @board.destroy!

    respond_to do |format|
    format.html { redirect_to boards_url, notice: "Board was successfully destroyed." }
    format.turbo_stream { render turbo_stream: turbo_stream.remove(@board) }
    end
end

  1. Update app/views/boards/index.html.erb - add unique IDs for each board:

    Updated file: 
    <div class="row w-100">
<div class="d-flex justify-content-between">
    <%= link_to 'New Board', new_board_path, class: 'btn btn-outline-primary invisible' %>
    <h1 class="text-primary-dark-500">
    Boards
    </h1>
    <div>
    <%= link_to 'New Board', new_board_path, class: 'btn btn-outline-primary' %>
    </div>
</div>
</div>

<div class="row w-100">
<% @boards.each do |board| %>
    <div id= <%= dom_id(board) %> class="col-3 my-3">
    <div class="card border border-primary-grey-200">
        <%= turbo_frame_tag dom_id(board, :edit) do %>
        <div class="card-header bg-primary-grey-200">
            <div class="d-flex justify-content-between align-items-center">
            <h5 class="card-title mb-0">
                <%= link_to board.name, board, data: { turbo_frame: '_top'}, class: 'link-underline link-underline-opacity-0' %>
            </h5>
            <div class="d-flex gap-2">
                <%= link_to edit_board_path(board), class: 'text-default' do %>
                <i class="fa-solid fa-pencil text-primary-dark-600"></i>
                <% end %>
                <%= link_to board, data: { turbo_method: :delete, turbo_confirm: 'Are you sure?' }, class: 'text-danger' do %>
                <i class="fa-solid fa-trash text-primary-dark-600"></i>
                <% end %>
            </div>
            </div>
        </div>
        <% end %>
        <div class="card-body bg-primary-grey-100">
        <div class="card-text">
            <p>
            <%= "Columns: #{board.board_columns.size}" %>
            </p>
            <p>
            <%= "Cards: #{board.board_columns.joins(:cards).count}" %>
            </p>
        </div>
        </div>
    </div>
    </div>
<% end %>
</div>

Branch with all deletes fixed: git checkout turbo-frames-deletes

Turbo Broadcasts

Links:

https://www.rubydoc.info/gems/turbo-rails/Turbo/Broadcastable https://www.hotrails.dev/turbo-rails/turbo-streams

Task 1: Adding broadcasts to columns

  1. Update app/views/boards/show.html.erb - Add turbo stream tag to connect user to websocket channel at the top of file
Updated file: 
   <%= turbo_stream_from dom_id(@board) %>

also within the same file add turbo stream tag that we will use to append broadcasted columns

Updated file: 
   <% @board_columns.each do |board_column| %>
      <%= render partial: 'board_columns/board_column', locals: { board_column: board_column } %>
   <% end %>
   <%= turbo_frame_tag dom_id(@board, 'columns') %> # newly added line
   <%= turbo_frame_tag dom_id(BoardColumn.new) %>
  1. Update app/models/board_column.rb - include ActionView::RecordIdentifier library to use dom_id in model, add broadcast callback to model
Updated file: 
class BoardColumn < ApplicationRecord
include ActionView::RecordIdentifier

# ...

broadcasts_to ->(board_column) { "board_#{board_column.board_id}" },
          target: ->(board_column) { "columns_board_#{board_column.board.id}" },
          inserts_by: :append

Task 2: Triggering columns broadcasts on card changes

  1. Update app/models/card.rb - add callback that will touch and update associated columns while modifying cards
Updated file: 
class Card < ApplicationRecord
   include ActionView::RecordIdentifier

   after_commit :touch_affected_board_columns
   
   private
   
      def touch_affected_board_columns
      if previous_changes[:board_column_id].present?
         board.board_columns.find_by(id: previous_changes[:board_column_id]&.first)&.touch
         board.board_columns.find_by(id: previous_changes[:board_column_id]&.last)&.touch
      else
         board_column.touch
      end
   end
end

Branch with all deletes fixed: git checkout turbo-broadcasts

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Workshop application to learn Hotwire

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