All entities loaded when show method called for just one

Has anybody else experienced this behavior? I had originally posted this in the data forum, apparently a mod has decided this is a ROO issue.

I think I'll file a jira ticket.

Ticket logged https://jira.springsource.org/browse/ROO-2943

OK so I've tracked down the cause of this.

The controllers that get generated by roo have the @ModelAttribute annotation attached to several populate methods. See this for more info.

This causes a rather heavy query of findAllPlanets to be called and added to the ui Model on every request, even if the view doesn't require it. That's naughty.

At the moment my solution is to push these methods in and return null. e.g. from the pet clinic sample.

This method from PetController_Roo_Controller.aj

Code:

---

@ModelAttribute("pets")
    public Collection<Pet> PetController.populatePets() {
        return Pet.FindAllPets();
}

---

Becomes the follwoing in PetController.java

Code:

---

@ModelAttribute("pets")
    public Collection<Pet> populatePets() {
        return null;
}

---

But something more elegant is definitely required.

I'm glad you've found the reason. I had no time to watch this.

There's a POST and a JIRA ticket on this regard, but now I don't remember any of them.

This is a very-very sad programming issue... Unfortunately, It has been dangling there forever.
I reported -and fixed- long time ago in http://pragmatikroo.blogspot.com/201...libration.html.

What is ever more disturbing is that none of the documentation available on Roo -including books-, take care of it.

This just a little example of having other product advocates and book writers than the "official" ones would be on the best interest of everybody vested in SR.


B. Roogards
jD

Hi JD,

The post seems to be a story of you fixing a performance issue. Sadly no technical detail at all. Would you care to go into detail? I'm sure we'd all benefit if you've found anything we may have missed.

@aRJUNsOL,

Two Spring Roo "true stories*" at https://pragmatikroo.org/showcases for you to check out...

I've been trying to get the attention of SR stakeholders and book publishers -for supporting my work- for properly sharing a lot of SR stuff.

As you stated

Quote:

---

I'm sure we'd all benefit...

---

I need to be included in the ALL that you mentioned.



B. Roogards
jD
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