Eager loading or Lazy loading

rubyonrails-talk
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

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 Cheung wrote:

4

Frederick Cheung 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!

5

Frederick Cheung 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!

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

Fred