Question

is It possible get a shuffle/random of a collection from action in controller.

def action
 #pseudocode something like the next:
 @objects = Object.random
 respond_to do |format|
  format.html
 end
end

I now can get shuffle from my view, with:

<% @objects.shuffle.each do |microfunc| %>
.
.
.
<% end %>

On view is possible with each or for loop. I don’t want use loop to get random Object from one collection.

How can I get random objects inside Mongoid::Criteria from my action controller?

Answer 1

There isn’t a great way. Your choices:

• Store an integer for each document and get by its value: http://cookbook.mongodb.org/patterns/random-attribute/
• use ‘skip’ which is inefficient: Mongoid random document