Eager loading or Lazy loading

Rails
1

Hai…

Whether ruby on rails is eager loading or lazy loading???

I think while using association in model its getting eager loading…

can any one explain more???

2

On 3 Apr 2008, at 14:57, Selvaraj S. wrote:

Hai…

Whether ruby on rails is eager loading or lazy loading???

I think while using association in model its getting eager loading…

Assuming I do bob = Person.find(124) and then do something with
bob.orders, then the association is lazy loaded, it’s not loaded until
you touch it. You can also eager load: bob = Person.find(124, :include
=> ‘orders’)

Fred

3

Thanks…I got it…

Frederick C. wrote:

On 3 Apr 2008, at 14:57, Selvaraj S. wrote:

Hai…

Whether ruby on rails is eager loading or lazy loading???

I think while using association in model its getting eager loading…

Assuming I do bob = Person.find(124) and then do something with
bob.orders, then the association is lazy loaded, it’s not loaded until
you touch it. You can also eager load: bob = Person.find(124, :include
=> ‘orders’)

Fred

4

Frederick C. wrote:

Assuming I do bob = Person.find(124) and then do something with
bob.orders, then the association is lazy loaded, it’s not loaded until
you touch it. You can also eager load: bob = Person.find(124, :include
=> ‘orders’)

How do you use :include to add a column that must appear in the
:conditions,
without eagerloading everything in that column’s table?

When we were tuning and we hit that one, we had to drop :include back to
an
old-fashioned :joins, which is really irritating!

A :lazy => true directive would have fixed it…

–
Phlip

5

On 22 Apr 2008, at 14:01, Phlip wrote:

How do you use :include to add a column that must appear in
the :conditions,
without eagerloading everything in that column’s table?

When we were tuning and we hit that one, we had to drop :include
back to an
old-fashioned :joins, which is really irritating!

You can do that with joins these days (:joins => :orders)

Fred