Review

Topics Covered: introduction to rails

Exercises

Note: All exercises must live inside of your session0202_exercises/firstname_lastname/d6 folder

While inside of your session0202_exercises directory, you can git add . then git commit -m "Helpful commit message here" and git push origin master to submit your homework to GitHub. (Don't forget to use git status along the way to check the state of your files in git)

Lab

Complete the lab from class today! Try to write down questions as comments inline if any come up. Commit and push the lab to Github under your d6/blog folder.

Essays

Create a file called answers.md in your day6 folder to answer the following questions. Feel free to include images as well as text (Google how to do this in Markdown). Even if you're not sure about the answer, try your best! Feel free to write any lingering questions you have in the same file.

Conceptual Questions

• Explain how a route leads to a controller and renders a view.
• Explain the difference between a schema, a database, and a model. Give an example by relating it back to the Blog app you built in lab today.
• Explain the purpose of a migration.

Code Questions

• What would the line resources :sharks in config/routes.rb do?
• What does rake routes do? Explain why you think this command might be useful.
• How would the code below look if it was written in Rails? Please specify what the name of the file or files would be as a comment, like it is below. How are routes handled differently in Rails?

# app.rb

require 'sinatra'

get '/' do
  erb :index
end

get '/heroes' do
  @heroes = ["Batman", "Superman", "Rogue", "Wolverine"]
  erb :heroes
end

get '/heroes/:hero' do
  heroes = {
            "Batman" => "batarang",
            "Superman" => "strength",
            "Rogue" => "flying",
            "Wolverine" => "claws"
            }
  @hero = params[:hero]
  @superpower = heroes[@hero]
  erb :hero
end

Presentations

Grab a partner, choose a topic we learned about today, and come up with a 60 second(ish) presentation worthy of the showing your fellow bru-sciples! We have some topics below for inspiration, but if you have a particular affinity to another topic, run it by Erica or Ian!

Topics

• big picture/how pieces connect
• what a resource route is
• what a form builder is
• what the purpose of a view is
• what params are in the context of Rails
• what a migration is
• what a database is
• what strong parameters means
• why we use partials
• why we use ERB

Bonus

If you think have a solid handle on everything, build another rails app with 1 model, and see what you can do!

Congrats on your first day of Rails!! Code on, brus.