Question

I’m trying to do something straight forward such as:

User.all(:criteria => {:project_id => 2})

This returns an instance of Mongoid::Criteria

What can I do with this criteria? What if I just want the array of documents returned for further evaluation?

Answer 1

Criteria is something like Relation object in ActiveRecord

You can use it this way

users = User.where(:project_id => 2)
users.each do |user|
  puts user.name
end
# or
users.all

This will return [] if there is no any user

users.all.each do |user|
  puts user.name
end