IT 231 -- Takehome Midterm

Due August 7, 2012

Deliverables: Place your file MidtermPartsAB.docx, and your folders MidtermPartC and MidtermPartD in a parent folder named TakehomeMidterm-Smith (replace Smith by your last name), then zip up the folder to produce TakehomeMidterm-Smith.zip and submit it on the D2L site.

Part A: Multiple Choice Questions. 3 points each. For each question, give an optional reason. 2 points for reason, 1 point for correct answer. If your answer is correct, the reason will not be considered. Create a folder named MidtermPartsAB.docx that contains your answers for Parts A and B.

1. Which Rails statement creates a controller with the name Poems and the views poem1 and poem2?
   a. rails g controller Poems poem1 poem2
   b. rails generate Poems controller poem1 poem2 views
   c. rails new controller Poems views poem1 poem2
    
d. ruby generate controller Poems poem 1 porm 2

2. What does CoC mean?
   a. Cascading over cases                         b. Compile on completion
   c. Confinement on convenienced.             d. Convention over configuration
    
3. What symbol or symbols start a comment in a Ruby file (file extension .rb)?
   a. <%          b. #           c. /*          d. //
    
4. Which Rails helper method produces this HTML link tag?
   <link rel='stylesheet' type='text/css' href='/stylesheets/styles.css' />
   a. stylesheet_link 'styles.css'
   b. stylesheet_link "styles.css"
   c. stylesheet_link_tag 'styles'
   d. stylesheet_link_tag styles.css
    
5. Which Rails helper method produces this HTML img tag?
   <img src="/images/dolphin.jpg" width="200" />
   a. img 'dolphin.jpg' width = 200
   b. image 'dolphin' width = 200
   c. image_tag 'dolphin.jpg' width = 200
   d. image_tag 'dolphin.jpg', width => 200
    
6. Which of the following could be the name of a Rails layout file?
   a. application.html.erb           b. controller.html.erb            c. layout.html.erb            d. layout.rb
    
7. If a scaffold-based project has the model name Animal, what is the URL that displays the show view of the animal with id = 23?
   a. http://localhost:3000/animals
   b. http://localhost:3000/animals/23
   c. http://localhost:3000/animals/show
   d. http://localhost:3000/animalsi/show/23
    
8. What is the output in the Command Prompt Window?

   amt = 2500
   tax = 0.05 * amt
   print "Total price = $#{amt + tax}.\n" 
   

   a.$2250                   b.$2500                   c.$2550                   d.$2625
    
9. What is the output in the Command Prompt Window if this code is run on August 6?

   t = Time.now
   u = "elephant"
   if u.length == 7
      len = "medium"
   elsif u.length == 8
      len = "large"
   elsif u.length == 9
      len = "jumbo"
   end
   w = t.day.to_s + len
   print w
   

   a. 6medium           b. 6large           c. 8medium           d. 9large           e. 10jumbo
    
10. What are the possible numbers that could be displayed in the view page1.html.erb?
    

    -------- Controller Code --------
    def page1
       x = 5 + rand 3
    end
    -------- View Code --------------
    <%= x + 1 %> 
    

    a. 0, 1, 2              b. 0, 1, 2, 3              c. 5, 6, 7, 8              d. 6, 7, 8

Part B. Short Essay. 10 points.

1. Explain what REST means and how it relates to Rails. (About 1/4 to 1/2 page.) Include CRUD and HTTP in your discussion. If you use the textbook, the internet, or other external sources, give references. Create a folder named MidtermPartsAB.docx that contains your answers for Parts A and B.

Part C. Create Scaffold Project. 15 points.

1. Create a Rails scaffold-based project named MidtermPartC that keeps track of medal winners in the 2012 London Olympics. Use a scaffold with the model name Olympic medals with the fields athlete_name, event, country, medal_type (gold, silver, bronze), event_date.
    
   
   1. Change the dropdown menu for event_date so that only 2012 is displayed.
       
   2. Use validations to insure that athlete, and country are non empty.
       
   3. Use a validation with the :inclusion argument to insure that medal_type is "gold", "silver", or "bronze".
       
      validates :medal_type, :inclusion => { :in => ["gold", "silver", "bronze"] }
       
   4. Use the layout page to display this image of olympic rings on all pages of the project.
       
   5. In the CSS file scaffolds.css.scss:
      
      1. Change the text color to white.
      2. Change the background color to black.
      3. Set the color of all hyperlinks to white.
      4. Set the font size to 110% of the default.
      5. Set the width of the olympic rings image in Part d to be 150 pixels.
      
      
   6. Start the server and view your project in a browser. Use the new view of your project to enter the following olympic medal information in your project's database:

      AthleteName	Event	Country	MedalType	EventDate
      Ryan Lochte	Men's 200m IM	USA	Gold	July 7
      Elizabeth Armitstead	Women's Road Cycling	Great Britain	Silver	July 6
      Yu Dan	Women's 10m Air Rifle	China	Bronze	July 6

Part D. Find the Errors. 15 points.

1. Fix the errors in the following source code. All your code should be XHTML complient. To check your answer, you can build a Rails project named MidtermPartD using the corrected source code. Generate a controller named ShowDateTime with a view named display. Copy these images to the assets/images folder before viewing the project.
    
   
   jan.jpg   feb.jpg   mar.jpg   apr.jpg   may.jpg   jun.jpg
   jul.jpg   aug.jpg   sep.jpg   oct.jpg   nov.jpg   dec.jpg
   sun.png   moon.jpg  
   
   There are about 20 intentional mistakes.
   

   ----- View code in app/views/show_date_time/display.html.erb -----------------------
   
   <p>Date and Time: <%= @datetime %><br>
   <%= image_tag @timeimg, :class => "img" %>
   
   <p>Month: <%= @monthname %><br />
   <% image-tag @monthimg, :class = "img" %></p>
   
   ----- Layout code in app/views/layouts/application.html.erb ------------------------
   
   <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
   
   <html>
   <head>
   <title><%= @title %>
   <%= stylesheet_tag "application" %>
   
   <body>
   <h2><%= @title %></h2>
   yield
   </body>
   </html>
   
   ----- Controller code in app/views/show_date_time_controller/display.html.erb ------
   
   class ShowDateTimeController < ApplicationController
   
     def display

        @title = "Takehome Midterm -- Show Date and Time"
       t = Time.now
       @date_time = t
       if t.hour >= 6 && t.hour <= 18
         @timeimg = "sun.png"
       else
         @timeimg = "moon.jpg"
       end
   
       if t.mon == 1
         @monthname = "January"
         @monthimg = "jan.jpg'
       elsif t.mon = 2
         @monthname = "February"
         @monthimg = "feb.jpg"
       elsif t.mon == 3
         @monthname = "March"
         @monthimg = "mar.jpg"
       elseif t.mon == 4
         @monthname = "April"
         @monthimg = "apr.jpg"
       elsif t.mon == 5
         @monthname = "May"
         @monthimg = "may.jpg"
       elsif t.mon == 6
         @monthname = "June"
         @monthimg = "jun.jpg"
       elsif t.mon == 7
         @monthname = "July"
         @monthimg = "jul.jpg"
       elsif t.mon == 8
         @monthname = "August"
         @monthimg = "aug.jpg"
       elsif t.mon == 9
         @monthname = "September"
         @monthimg = "sep.jpg"
       elsif t.mon == 10
         @monthname = "October" 
         @monthimg = "oct.jpg"
       elsif t.mon == 11
         @monthname = "November" 
         @monthimg = "nov.jpg"
       elsif t.mon == 12
         @monthname = "December" 
         @monthimg = "dec.jpg"
       end
   
   end
   
   ----- Stylesheet code in assets/stylesheets/application.html.erb -------------------
   
   /*
   *= require_self
   *= require_tree .
   */
   
   body { font-family; Helvetica:
          font-size: 110%;
          text-color: navy;
          background_color: lightblue; 
   
   .img { width: 200px; }