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populateObjects(&$item) Not loading 3rd level item
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TOPIC: populateObjects(&$item) Not loading 3rd level item

populateObjects(&$item) Not loading 3rd level item 22 Dec 2012 12:37 #6220

  • JoomGuy
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Hi @admin,

I'm just working on the frontend of my component at the moment, specifically, creating the section, category and item views. I have this relationship setup; Section -> Category -> Inventory.

What I'm trying to do is create a sort of Section Blog layout where viewing section1 will display all related categories. Also, inside of those categories, I should also be grabbing all of the related items (inventory) too.

So, to do this I've written the following functions and added them to the relevant ITEM models:
SECTION MODEL - grab all related categories
/**
* Prepare related categories and add them to @item
*
* @access	public
* @param	Item	&$item
*
* @return	void
*
* @since	1.6
**/
public function populateObjects(&$item)
{
	$modelCategories = JModel::getInstance('Categories', 'JstoresocialModel');
	$modelCategories->addWhere('a.section = ' . (int)$item->id);
	$item->categories = $modelCategories->getItems();
	
	//Debug - Uncomment following
	echo "<pre>"; print_r($item); echo "</pre>";
}
CATEGORY MODEL - grab all related inventory items
/**
* Prepare related categories and add them to @item
*
* @access	public
* @param	Item	&$item
*
* @return	void
*
* @since	1.6
**/
public function populateObjects(&$item)
{
	$modelInvitems = JModel::getInstance('Inventory', 'JstoresocialModel');
	$modelInvitems->addWhere('a.category = ' . (int)$item->id);
	$item->inventoryitems = $modelInvitems->getItems();

	//Debug - Uncomment following
	echo "<pre>"; print_r($item); echo "</pre>";
}
The Issue
Firstly, in themselves, they both work fine; viewing a section does in fact output all related categories and viewing a category displays all of the related items.

However, when viewing a section, I was expecting every category related to the section to also contain inventory items too because of the unlimited cascades and as I am not currently setting any state var.

Am I missing something? Any help/pointers would be massively appreciated!!!

Many thanks,

Gez
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Last Edit: 22 Dec 2012 12:39 by JoomGuy.
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Re: populateObjects(&$item) Not loading 3rd level item 22 Dec 2012 13:05 #6222

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populateObject() is an excellent title to get my attention.

Thanks for asking.

This function has been designed to populate N-M or N-1 lists objects as you are doing.

I cannot see what is missing...

Is populateObject() called in the second cascad call ? (Try to dump)
if not, call it from your first call.

Should work... Strange.
Guess you will find.

Important note :
populateObject is always called, even for short lists...
So, please encapsulate the loading in a check on a state var ('xref.categories' for example)
And : set up this state var to true from the calling view, in order to organize better you code.

Do not forget, in the cascad call, to set up the 'xref..' state var as well.

But for the moment to make it working, you can make your tests without.

EDIT : I read again, and realize that you had voluntary removed the states vars. :blush:

Good luck, and if you cannot find... toc toc admin ok.
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Last Edit: 22 Dec 2012 13:11 by admin.
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Re: populateObjects(&$item) Not loading 3rd level item 22 Dec 2012 13:13 #6225

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Hi @admin thanks for the quick response!
Is populateObject() called in the second cascad call ? (Try to dump)
if not, call it from your first call.
Yes, I'm already debugging using print_r() in my category model on inventory items. I can see the related items in category view, but not one level up in sections.

Thanks,

Gez
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Re: populateObjects(&$item) Not loading 3rd level item 22 Dec 2012 13:22 #6226

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Here's what I get from printing the section;
stdClass Object
(
    [id] => 2
    [published] => 1
    [alias] => wildlife
    [description] => 
    [image] => 
    [ordering] => 2
    [title] => Wildlife
    [params] => JObject Object
        (
            [_errors:protected] => Array
                (
                )

            [access-view] => 1
        )

    [categories] => Array
        (
            [0] => stdClass Object
                (
                    [id] => 4
                    [published] => 1
                    [params] => JObject Object
                        (
                            [_errors:protected] => Array
                                (
                                )

                            [access-view] => 1
                        )

                    [title] => Birds
                    [alias] => birds
                    [image] => 
                    [description] => 
                    [section] => 2
                    [ordering] => 1
                )

            [1] => stdClass Object
                (
                    [id] => 5
                    [published] => 1
                    [params] => JObject Object
                        (
                            [_errors:protected] => Array
                                (
                                )

                            [access-view] => 1
                        )

                    [title] => Dolphins
                    [alias] => dolphins
                    [image] => 
                    [description] => 
                    [section] => 2
                    [ordering] => 2
                )

            [2] => stdClass Object
                (
                    [id] => 6
                    [published] => 1
                    [params] => JObject Object
                        (
                            [_errors:protected] => Array
                                (
                                )

                            [access-view] => 1
                        )

                    [title] => Seahorses
                    [alias] => seahorses
                    [image] => 
                    [description] => 
                    [section] => 2
                    [ordering] => 3
                )

            [3] => stdClass Object
                (
                    [id] => 7
                    [published] => 1
                    [params] => JObject Object
                        (
                            [_errors:protected] => Array
                                (
                                )

                            [access-view] => 1
                        )

                    [title] => Mini Animals
                    [alias] => mini-animals
                    [image] => 
                    [description] => 
                    [section] => 2
                    [ordering] => 4
                )

            [4] => stdClass Object
                (
                    [id] => 8
                    [published] => 1
                    [params] => JObject Object
                        (
                            [_errors:protected] => Array
                                (
                                )

                            [access-view] => 1
                        )

                    [title] => Dragonflies
                    [alias] => dragonflies
                    [image] => 
                    [description] => 
                    [section] => 2
                    [ordering] => 5
                )
        )
)
As I said, I was expecting each of the [categories] elements to contain an [inventoryitems] element too. Just to clarify this, I am getting the inventoryitems from the category view.

Thanks for all the additional pointers with the state vars/calls!!!

Gez
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Re: populateObjects(&$item) Not loading 3rd level item 22 Dec 2012 14:46 #6237

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Can't work this one out - As I said it works to get sub (one-level related) items. Just not sub-sub-items.

What am I missing??? :unsure:

Thanks,

Gez
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Re: populateObjects(&$item) Not loading 3rd level item 26 Dec 2012 09:24 #6273

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Still not been able to get 2nd level results into object.

Any ideas?

Thanks,

Gez
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Re: populateObjects(&$item) Not loading 3rd level item 03 Jan 2013 11:45 #6341

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Hi Audibleid, without looking into too much details, i wondered the following in the category model:
$modelInvitems->addWhere('a.category = ' . (int)$item->id);

What is the value of the item->id. Is it the id of the category, or does it contain somehow the id of the section?
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Re: populateObjects(&$item) Not loading 3rd level item 03 Jan 2013 11:56 #6343

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Hi @molenwal1,

$item->id in the category model is the id of the category, yes... The section is stored in the category table as FK (section).

What you thinking?

Cheers for the reply!

Gez
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Re: populateObjects(&$item) Not loading 3rd level item 03 Jan 2013 12:59 #6345

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I thought that maybe there is a glitch that it contains the section id number and not the category id number and for that reason there are no inventory items found. I don't know if you have tested the value of the id.
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Re: populateObjects(&$item) Not loading 3rd level item 03 Jan 2013 13:09 #6346

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Yep, it all works fine when getting the first related item - it just doesn't work at the next level.

Thanks,

Gez
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Re: populateObjects(&$item) Not loading 3rd level item 15 Jan 2013 05:20 #6450

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Hi Gez

I don't know if this is the correct solution but I added $model->populateObjects($item); to the foreach loop of the populateParams function in the com_myproject/classes/jmodel.list.php file to solve this issue.

The jmodel.list.php and jmodel.item.php files currently have empty "populateObjects" functions.

Please let me know if you have found a better way to solve this issue.

Thanks
vlemos


if ($model)
{
if ($model->canView($item))
$item->params->set('access-view', true);

if ($model->canEdit($item))
$item->params->set('access-edit', true);

if ($model->canDelete($item))
$item->params->set('access-delete', true);

if (!$model->canCheck($item))
$item->params->set('tag-checkedout', true);

$model->populateObjects($item);

}
Last Edit: 15 Jan 2013 05:26 by vlemos.
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Re: populateObjects(&$item) Not loading 3rd level item 15 Jan 2013 08:24 #6451

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Hi @vlemos,

Thanks for your reply...

I'm working on a few other bits and pieces today but will try and check that later! Thanks again!

Gez
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Re: populateObjects(&$item) Not loading 3rd level item 15 Jan 2013 10:50 #6453

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I want to check that as well to furnish you the good answer.

The thing is now I cannot uprade because the new comming version is changed a lot and I must funish it before to upgrade next Cook version.
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Re: populateObjects(&$item) Not loading 3rd level item 15 Jan 2013 15:42 #6458

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Simple !

Sorry for answering late.

There are TWO different places for populateObjects() : ITEM and COLLECTION

For you first, if you start in the ITEM model, write in the ITEM model,
Then, for the second and all related, write in the COLLECTION :
public function populateObjects(&$items)
{
	if ($this->getState('xref.categories'))
	{
		foreach($items as $item)
		{
			$model = JModel::getInstance('Categories', 'XxxxModel');

//Set the cascade state DO NOT FORGET !! (inventoryitems for you)
			$model->setState('xref.inventoryitems', true);
			
			$model->setState('filter.section', $item->id);

			$item->categories = $model->getItems();
		}
	}

}
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Last Edit: 15 Jan 2013 15:44 by admin.
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Re: populateObjects(&$item) Not loading 3rd level item 15 Jan 2013 16:18 #6461

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Of course!!! Thanks Monsieur!
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