I think I will stick with one load per call and probably will end up
saving it in the application scope so it's available
in other places as needed.
Thank you
Victor
On Mon, Jan 18, 2010 at 2:06 AM, Barney Boisvert bboisv...@gmail.com wrote:
It does solve the problem, but has pretty
You should virtually never cache ORM-managed instances anywhere.
Their state MUST be managed by the ORM framework, or you run into all
kinds of crazy issues. If you simply must cache one (a common-ish use
case is for business-level transactions where you need to keep
modified persistent
You should virtually never cache ORM-managed instances anywhere.
Their state MUST be managed by the ORM framework, or you run into all
kinds of crazy issues. If you simply must cache one (a common-ish use
case is for business-level transactions where you need to keep
modified persistent
Good to know.
This is exactly the stuff I was talking about. Using old tricks with new dogs :)
Before, I as just running the query at application start up, loading
it in app scope (I need it for read only purposes anyway) and use it
whenever i need it.
It changes very rarely but when changes I
Hi Barney,
After trying to find the answer to the question for almost a day I was
afraid that the answer is no but just wanted to be sure :)
The reason I want only a few is for display purposes. Just to give
some indication to users the type of subcategories exists.
While I like the idea of
If you subCategories collections are relatively small, then you should
be safe to just loop over it and terminate after the third row. Yeah,
you'll be getting more than you need back from the database, but
Hibernate is really good about optimizing data access for
relationships, so I'd assume it
According to this posty,
http://www.rupeshk.org/blog/index.php/2009/09/coldfusion-orm-performance-tuning-lazy-loading/,
if you use lazy=proxy, you would only load the objects you use. So if
you only displayed the first three, then only the first three would be
loaded.
On Sun, Jan 17, 2010 at
lazy=proxy gives you N+1 behaviour for your collection. That is, if
you need a Category and it's 10 subcategories, you'll end up doing 11
queries (one to retrieve each row individually). Of course, if you
only use the category and three children you'll only run 4 queries.
But if you do an eager
I'm confused - are you saying this _doesn't_ solve the problem - or
has side effects if he doesn't use it as described? Or are you saying
that it is best to just get em all at once?
On Sun, Jan 17, 2010 at 10:19 PM, Barney Boisvert bboisv...@gmail.com wrote:
lazy=proxy gives you N+1 behaviour
It does solve the problem, but has pretty significant performance
implications in common use cases, which is why it's not the
default. Obviously it's hard to say what is best without seeing the
code, but I'd say the default (just get them all) is probably best,
unless the category tree
The short answer is no.
The long answer is that yeah, you can do a whole bunch of hacking
around to make it work like that (or at least APPEAR to work like
that), but it's a mess. I can't think of a case when you wouldn't be
better off a) just constraining the loop over the subcategories when
You're too kind :)
On 2/20/07, Dinner [EMAIL PROTECTED] wrote:
Yup, that was the one!
Mr. Nate- YOU ROCK.
On 2/20/07, Rob Wilkerson [EMAIL PROTECTED] wrote:
This one, perhaps?
http://www.dopefly.com/techblog/entry.cfm?entry=149
Once you said something, it occurred to me that I
On 2/21/07, Nathan Strutz @gmail.com wrote:
You're too kind :)
Not by half!
~|
Create Web Applications With ColdFusion MX7 Flex 2.
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http://www.adobe.com/products/coldfusion/flex2/
Reactor does not generate data table. I have not used Transfer as yet.
There is a CF Hibernate open source project here:
http://cfopen.org/projects/cfhibernate/
I am not sure how active that project is though.
Teddy
On 2/20/07, Rob Wilkerson [EMAIL PROTECTED] wrote:
I've been digging
Rob,
Reactor and Transfer operate in the reverse of what you're looking for: they
introspect the existing database to create DAOs, Gateways, TOs, etc. Reactor
(probably Transfer, too; I'm just not sure) can also create aliases for your
column names, if you define them in the XML config. But if
Rob,
Apologies for the self-promotion, but I have a (free) tool that does this
(though it isn't technically an ORM tool).
blog:
http://steve.coldfusionjournal.com/create_tables_with_data.htm
see the Synchronize Database Structure presentation:
Slightly off topic but if you want to understand a little more about
transfer Mark Mandel (transfer creator) has just been interviewed on
cfFrameworks.com. Heres the link:
http://www.cfframeworks.com/blog/index.cfm/2007/2/20/Mark-Mandel-talks-about-his-Transfer-ORM-Framework
HTH
On 20/02/07,
Thanks, all. Since I saw no evidence that either tool would do this,
I thought I'd ask, but since I also didn't see any evidence with
Hibernate...well, it does it, maybe other tools just don't market that
capability either. I guess that's not the case.
Nick, I'll definitely look at the
Rob,
If you are looking for Transfer presentations, Mark links to a few from the
Getting Started page of his documentation:
http://www.compoundtheory.com/transfer/documentation/gettingStarted.html
Steve
Nick, I'll definitely look at the interview with Mark. I've also
heard about at least one
On 2/20/07, Rob Wilkerson @gmail.com wrote:
Thanks, all. Since I saw no evidence that either tool would do this,
You know, someone had blogged about using the generated
reactor info to reverse the process-- they'd accidentally blown
away the DB and were able to re-create it using the
This one, perhaps?
http://www.dopefly.com/techblog/entry.cfm?entry=149
Once you said something, it occurred to me that I had seen a similar
post, as well...
On 2/20/07, Dinner [EMAIL PROTECTED] wrote:
On 2/20/07, Rob Wilkerson @gmail.com wrote:
Thanks, all. Since I saw no evidence that
Yup, that was the one!
Mr. Nate- YOU ROCK.
On 2/20/07, Rob Wilkerson [EMAIL PROTECTED] wrote:
This one, perhaps?
http://www.dopefly.com/techblog/entry.cfm?entry=149
Once you said something, it occurred to me that I had seen a similar
post, as well...
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