Loop in Ruby on Rails html.erb file

Question

everybody I'm brand new with Ruby on Rails and I need to understand something. I have an instance variable (@users) and I need to loop over it inside an html.erb file a limitated number of times. I already used this:

<% @users.each do |users| %>    <%= do something %> <%end %> 

But I need to limitate it to, let's say, 10 times. What can I do?

Answer 1

If @users has more elements than you want to loop over, you can use first or slice:

Using first

<% @users.first(10).each do |users| %>   <%= do something %> <% end %> 

Using slice

<% @users.slice(0, 10).each do |users| %>   <%= do something %> <% end %> 

However, if you don't actually need the rest of the users in the @users array, you should only load as many as you need by using limit:

@users = User.limit(10) 

Answer 2

You could do

<% for i in 0..9 do %>   <%= @users[i].name %> <% end %> 

But if you need only 10 users in the view, then you can limit it in the controller itself

@users = User.limit(10)