I've got an ASP.NET website setup using Castle ActiveRecord and
Validator, the website is using a custom Http Module to create/dispose
the SessionScope per request.
Scenario: A request comes in to Modify a customer object.
Customer cm = Customer.Find(customerId);
cm.Mobile = newMobileValue;
ValidatorRunner _runner = new ValidatorRunner(new
CachedValidationRegistry());
if (_runner.IsValid(cm))
{
// Update the object, ie: cm.Save();
}
else
{
// Handle the failed validators
}
Now regardless if the object failed or not the validation it will be
saved because the object is dirty, so I thought I could make the
"global" sessionscope read-only, but that would also be troublesome
because if I flushed the session it would end up saving all dirty
objects in it's scope to the database.
That lead me to believe I had only one option left, create a read-only
SessionScope per object I needed to modify it, so flushing it would
only save what's contained within it, but that has another downside,
if I'm editing/validating several objects at once creating so many
sessions would force plenty of database accesses instead of a single
with only the "valid" changes.
So after reading through ActiveRecord's documentation all over again,
I found somewhere it mentions I could use scope.Evict() to remove the
object from the SessionScope and bind it again by using object.Save(),
that sounds like a better approach but I can't find the method Evict
within my SessionScope, but that would also probably cause me trouble
with lazily initialized collections.
Is there any way I could for example check every object I wanted to be
updated by calling .Save() and when the session flushed it would only
persist the changes to the objects I marked instead of them all?
So after this essay, would anyone kindly point me in the right
direction or tell me what/where to read more into how I should be
handling this? Or any other better way to handle dirty objects versus
validators, etc.
Thanks in advance,
Thi
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