Controller

Question 1

If you want a function to be executed for all your methods what can you add to the top of your controller file?

Answer 1

before_action :find_article

Question 2

How would you find a model instance by id/attribute value?

Answer 2

Article.find(params[:id])

Article.find_by(title: ‘Gandalf’)

Question 3

If you have a create action/method how can you create the model object to avoid the strong parameters security error? To tell Rails to only accept values from specific params hash keys?

Answer 3

def article_params
params[:article].permit(:title, :body)
end

Question 4

How can you authenticate users to all actions for a controller? To make sure a user is logged in if they wish to create an article for example?

Answer 4

before_action :authenticate_user!

Question 5

How can you update the attributes on an model instance?

Answer 5

Model.update(model_params)

Question 6

What kind of variable do you use in order to access it from a view template?

Answer 6

An instance variable and you add a @ like so @article, now you have access to the variable in your view