Can I write an Eager Load Attribute?
Tommy
via web
Hello,
I'm using Automapping and looking to get some relationships on a class to load eagerly and others not to for performance reasons. The best way for me to do this IMHO would be to create an attribute and have a convention pick this up and eagerly load those relationships. Is this possible? I know I could override the Automapping for certain classes but that doesn't seem like as good a solution.
Could somebody please point me in the right direction?
Thank you,
Tommy
Support Staff 2 Posted by James Gregory on 02 Sep, 2010 09:03 AM
As far as I know, eager loading is a query only operation. There's nothing you can specify in the mapping to say a collection should be eager loaded. You can specify that a collection is not lazy, but that isn't the same as eager.
3 Posted by Tommy on 02 Sep, 2010 09:07 AM
Ah, thanks for the swift reply. Perhaps I'm getting my semantics confused; what exactly is the difference between Not Lazy-Loading and Eager Loading?
How would I go about writing an attribute based convention to tell a particular property to not lazy-load?
Thanks again,
Tommy
Support Staff 4 Posted by Paul Batum on 15 Sep, 2010 05:22 PM
Make a class that implements IPropertyConvention and
IPropertyConventionAcceptance
In the implementation for Accept, use reflection to determine if the member
has your attribute.
In the implementation for Apply, modify the instance accordingly.
This will ONLY apply to mapped properties. If you want to do the same thing
for relationships, etc, then you'll have to make conventions with the
appropriate interfaces (such as ICollectionConvention)
On Thu, Sep 2, 2010 at 2:09 AM, Tommy <
***@tenderapp.com<tender%***@tenderapp.com>
> wrote: