Question

Suppose I need to check if a certain property is not set.

I imagine something like this but It doesn’t work.

@users = User.find_all_by_role(["role = ?",nil])

I tried some other variants with no luck.

I guess this should be pretty straightforward.

Thank you!

Answer 1

Using ActiveRecord’s pre-3.0 syntax:

@users = User.find(:all, :conditions => { :role => nil })

After 3.0 you can write:

@users = User.where(:role => nil)