mod2diagnostic.markdown

Week 5 Diagnostic

• When and why would you rebase?
  • To clean up your commits and get rid of redundant or pointless commits
• What are the steps to do a basic rebase via the command line?
  • git rebase -i which open atom(on my computer) then choose which commits to delete and which to leaved picked
• Our cart in Little Shop is not stored in the database. How does its state persist across requests?
  • through an instance variable and session[:cart]
• Name two objects used in Rails that can be used to track state of the user across requests.
  • sessions and cookies and the database
• Draw the MVC model and the request response cycle through a rails app.
  • client: request -> routes -> controller -> model -> controller -> view -> response -> client
• Give an example of something you'd use a Rails helper for.
  • In little shop we used a rails helper to pull out the logic determining if a button in the navbar was a login or logout link
• How can we clean up duplicated code in the views?
  • partials
• What type of variable is automatically available in a partial?
  • locals passed into the partial
• If you want to use a local variable in a partial, what syntax is used?
  • render partial: "partial_name", locals: { variable_in_partial: variable_being_passed }
• Describe the function and duties of the asset pipeline.
  • To precompile assets like Sass and Coffeescript, to concatenate your assets into single files for each type, and to minify them to save space
• Give an example of an unacceptable use of a callback in Rails.
  • A callback that modifies a seperate model in the database