2021 ROR

Question 1

What is a scope in ROR?

Answer 1

Scopes are custom queries that you define inside your Rails models with the scope method.

in Post model:
scope :free, -> {where(premium: false)}

In Post controller:
@posts = Post.free

Question 2

Why use scopes in ROR?

Answer 2

Scopes helps you avoid errors when your scope returns nothing.

<div>

</div>

<pre>
<code>
Scopes are used for exactly one thing, <br></br>
so you know what you get the moment you see one
</code></pre>

Question 3

What does the error “Uninitialized Constant” mean?

Answer 3

It probably means that there is a file missing

Question 4

What are the naming conventions for controllers?

Answer 4

The naming convention for controllers is Plural
example
EventsController, BookingsController etc

Question 5

How do you add a favicon to an rails app?

Answer 5

in layout.html.erb and inside the head tag add:

And the image in the assets/images folder