README

This is the 'Kanban Board' example app. See https://backend-development.github.io/rails_view_and_controller.html

Study the Models

This Application already has two models: boards and cards. Create the database and load the seed data by running rails db:setup

Replace the Homepage

Redirect home to the list of kanban boards.

Study Dependent Models

Cards depend on their board and are deleted when the board is deleted. Delete a board and study the log file: how are the cards deleted? Does Rails use referential integrity in the database? Or does it do all the work itself?

A Better Form

Have a look at card.status. I has only four possible values. In the form for cards replace the textfield with a dropdown list.

Nested Ressources

Study the URLs, controllers and actions by running rails routes. Now change config/routes.rb to

resources :boards do
  resources :cards
end

How do the URLs change?

A word of warning: this change breaks a lot of the links in the views. We will fix them in the next step.

Changes in cards_controller

Change the card_controller to always read params[:board_id] and set a @board variable.
You can use a before_action to do that!

Make all the actions use the @board: The index action should only show cards of the current board.
The create action should only create new cards on the current board. and so on.

This also concerns the views: When creating or updating a card there should be no input-field for board_id in the form, the board_id is already specified by the url.

When you are done you should have fully functioning views and actions for cards again.

Display the Kanban Board

Research what a kanban board shold look like. Change the index-view of card to look like this.