On 8 Oct 2008, at 16:36, cjharrelson wrote:

>
> Here is a strange one for you:
>
> I am using rails 2.1.0.  I am also using the Time zones feature.
>
> I have a User model that has many enrollments.  The Enrollments model
> has several named scopes, one of which is today:
>
> # This named scope is adjusted to UTC
> named_scope :today, :conditions => ["updated_at >= ? AND updated_at
> <= ?",
>    Time.zone.now.beginning_of_day.utc, Time.zone.now.end_of_day.utc]
>

The Time.zone.now is evaluated precisely once: when the model is  
loaded. Use a lambda (see the section on procedural scopes in the api  
docs) to do something like

named_scope :today, lambda { :conditions => stuff here is evaluated  
each time the scope is accessed }

Fred


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