Programming Phoenix Chapter 6

Question 1

How do you select just the videos for a given user?

Accepted Answer

Ecto.assoc(user, :videos)

Question 2

What's outdated about this code?

Accepted Answer

The \ :empty default should be \ %{ } now, cast doesn't need that @optional_fields argument anymore, Module attributes (the @whatever stuff) ain't cool anymore

Question 3

Where does the authenticate_user plug, in router.ex, come from?

Accepted Answer

It's explicitly added to the router in web/web.ex

Question 4

In the controller, we can call build_assoc instead of Ecto.build_assoc. Why?

Accepted Answer

the import Ecto line for controllers in web/web.ex

Question 5

In order to plug our authenticate function into both controllers and the router, we have to…

Accepted Answer

move it out of UsersController, make it public (def) instead of private (defp)

Question 6

This generator creates what model and what table?

Accepted Answer

model: Video, table: videos

Question 7

In VideosController, were does conn.assigns.current_user come from?

Accepted Answer

the router, with pipe_through: [:authenticate_user]

Question 8

The seven RESTful routes include…

Accepted Answer

delete/destroy, edit, update, index, new, create, show

Question 9

What does def action do, in the controller?

Accepted Answer

def index(conn, params) becoms def index(conn, params, user)

Question 10

Your User model says has_many :videos, but calling user.videos says "not loaded." What to do?

Accepted Answer

user = Repo.preload(user, :videos)

Question 11

You must include the \ in the middle of this mix phoenix.gen.html command. Don't forget it!

Accepted Answer

false

Programming Phoenix Chapter 6

Questions 11

Programming Phoenix Chapter 6

Questions 11