Week 5 Quiz (Solutions)

gistfile1.txt

## Week 5 Quiz

## 0) Name 3 types of variables in Ruby? Put them in order from least scope to greatest.

a) Local (new = "foo")
b) Instance (@new = "foo")
c) Constant (NEW = "foo")

## 1) Where do SQL queries belong, the view or controller?

Controller





## 2) Controllers are can do 4 types of operations what are they (RRFF)?



Render, Redirect, Filter, Format




## 3) List the actions it usually take to fully implement CRUD in a web app:


show
index
edit
update
new
create
destroy




## 4) What view typically holds a form that submits to the `create` action?


new.html.erb



## 5) What view typically holds a form that submits to the `update` action?


edit.html.erb



## 6) If you forget what routes are available, what command can you run from the command line to help remember?


$ rake routes



## 7) Below is part of a route.rb file that would be mapped to the appropriate controller, replace this with one line of code.



    get '/comments'
    get '/comments/new'
    get '/comments/:id/edit'
    get '/comments/:id'

    post   '/comments'
    delete '/comments/:id’
    put    '/comments/:id'



Answer:  resources :comments


## 8) Below is the code for a controller and a view, what controller action will be hit when you click on a link labeled "click me"?

app/controllers/courses_controller.rb

    def index
      @courses = Course.all
    end

app/views/courses/index.html.erb
    <h2>Courses</h2>
    @courses.each do |course|
      <%= link_to "click me", course %>
    end


When you click "click me" text, the show action of the courses controller will be executed