outline.txt

Simplest Rails

1. Route, ApplicationsController that renders some HTML
2. Separate content and flow control - HTML as "views"
3. dynamically generated pages
  - data with different time
    - render template, passing in the data
    - render "dir/hello_world.html", locals: {time: "am"}

  - data from the URL
    - /hello/:name?foo=bar
  - data from the db (next chapter)

No Magic Rails

4. database backend apps
  - SQL code to create tables (posts) and some posts - execute SQL
  - show posts on the page
  - show a post on the page

5. collecting user's input
  - forms (create)
  - dealing with post params
  - execute SQL to create/update posts
  - destroy a post (id)

6. extract model class
  - self.new
  - self.create
  - self.find(id)
  - update
  - destroy

7. validations

8. migration to add comments

9. associations
  - show all comments for a post (with SQL, in the controller)
  - move this logic to Post class (def comments)
  - add a comment (def comments<<(comment))
  - delete all comments (def comment_ids and def destroy_all_comments)

Magic Rails

Routing
Layout and Views