I just can't tell what is wrong with this Model code that save() is raising an exception.||

Question

http://www.magentocommerce.com/boards/viewthread/760042/

My model object when passed to get_class appears to be ok.

2013-12-09T11:04:27-05:00 DEBUG (7):  get_class() Checkerboard_Workorder_Model_Workorderlineitem 

The Object itself looks good too.

2013-12-09T11:04:27-05:00 DEBUG (7): workorderlineitem -> Checkerboard_Workorder_Model_Workorderlineitem Object 
( 
[_eventPrefix:protected] => core_abstract 
[_eventObject:protected] => object 
[_resourceName:protected] => workorder/workorderlineitem 
[_resource:protected] => 
[_resourceCollectionName:protected] => workorder/workorderlineitem_collection 
[_cacheTag:protected] => 
[_dataSaveAllowed:protected] => 1 
[_isObjectNew:protected] => 
[_data:protected] => Array 
( 
[workorder_id] => 6 
[udrop_ship_item_id] => 25 
[order_item_id] => 100 
[created_timestamp] => 1386605067 
) 

[_hasDataChanges:protected] => 1 
[_origData:protected] => 
[_idFieldName:protected] => 
[_isDeleted:protected] => 
[_oldFieldsMap:protected] => Array 
( 
) 

[_syncFieldsMap:protected] => Array 
( 
) 

) 

But when I call save on the object the following exception is raised:

Can’t retrieve entity config: workorder/workorderlineitem 
#0 /var/www/html/app/code/core/Mage/Core/Model/Resource.php(272): Mage::throwException(’Can’t retrieve ...’) 
#1 /var/www/html/app/code/core/Mage/Core/Model/Resource/Db/Abstract.php(284): Mage_Core_Model_Resource->getTableName(’workorder/worko...’) 
#2 /var/www/html/app/code/core/Mage/Core/Model/Resource/Db/Abstract.php(247): Mage_Core_Model_Resource_Db_Abstract->getTable(’workorderlineit...’) 
#3 /var/www/html/app/code/core/Mage/Core/Model/Resource/Db/Abstract.php(586): Mage_Core_Model_Resource_Db_Abstract->getMainTable() 
#4 /var/www/html/app/code/core/Mage/Core/Model/Resource/Db/Abstract.php(449): Mage_Core_Model_Resource_Db_Abstract->_prepareDataForSave(Object(Checkerboard_Workorder_Model_Workorderlineitem)) 
#5 /var/www/html/app/code/core/Mage/Core/Model/Abstract.php(318): Mage_Core_Model_Resource_Db_Abstract->save(Object(Checkerboard_Workorder_Model_Workorderlineitem)) 
#6 /var/www/html/app/code/local/Checkerboard/Workorder/Model/Observer.php(125): Mage_Core_Model_Abstract->save() 
#7 /var/www/html/app/code/community/Unirgy/DropshipPo/Helper/Data.php(96): Checkerboard_Workorder_Model_Observer::createWorkorders(Array) 
#8 /var/www/html/app/code/community/Unirgy/DropshipPo/controllers/Adminhtml/PoController.php(80): Unirgy_DropshipPo_Helper_Data->sendVendorNotification(Object(Unirgy_DropshipPo_Model_Po)) 
#9 /var/www/html/app/code/core/Mage/Core/Controller/Varien/Action.php(419): Unirgy_DropshipPo_Adminhtml_PoController->resendUdposAction() 
#10 /var/www/html/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch(’resendUdpos’) 
#11 /var/www/html/app/code/core/Mage/Core/Controller/Varien/Front.php(176): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http)) 
#12 /var/www/html/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch() 
#13 /var/www/html/app/Mage.php(683): Mage_Core_Model_App->run(Array) 
#14 /var/www/html/index.php(93): Mage::run(’’, ‘store’) 
#15 {main} 

I am really confused by this, as everything looks to be ok in all of my code.

The official Magento forum has a link to download all of my code.

As requested the model section of my code.

       <models>
            <workorder>
                <class>Checkerboard_Workorder_Model</class>
                <resourceModel>workorder_mysql4</resourceModel>
            </workorder>

            <workorder_mysql4>
                <class>Checkerboard_Workorder_Model_Mysql4</class>
                <entities>
                    <workorder>
                        <table>workorder</table>
                    </workorder>
                </entities>
            </workorder_mysql4>


            <workorderlineitem>
                <class>Checkerboard_Workorderlineitem_Model</class>
                <resourceModel>workorderlineitem_mysql4</resourceModel>
            </workorderlineitem>

            <workorderlineitem_mysql4>
                <class>Checkerboard_Workorderlineitem_Mysql4</class>
                <entities>
                    <workorderlineitem>
                        <table>workorder_lineitem</table>
                    </workorderlineitem>
                </entities>
            </workorderlineitem_mysql4>

            <picklistitem>
                <class>Checkerboard_Picklistitem_Model</class>
                <resourceModel>picklistitem_mysql4</resourceModel>
            </picklistitem>

            <picklistitem_mysql4>
                <class>Checkerboard_Picklistitem_Model_Mysql4</class>
                <entities>
                    <picklistitem>
                        <table>picklist_items</table>
                    </picklistitem>
                </entities>
            </picklistitem_mysql4>

            <picklistproduct>
                <model>Checkerboard_Picklistproduct_Model</model>
                <resourceModel>picklistproduct_mysql4</resourceModel>
            </picklistproduct>
            <picklistproduct_mysql4>
                <class>Checkerboard_Picklistproduct_Model_Mysql4</class>
                <entities>
                    <picklistproduct>
                        <table>picklist_products</table>
                    </picklistproduct>
                </entities>
            </picklistproduct_mysql4>
        </models>

// Model/Workorderlineitem.php

/**
 * Workorderlineitem object model.
 * @author Chris Pinto
 */
class Checkerboard_Workorder_Model_Workorderlineitem extends Mage_Core_Model_Abstract {
    protected function _construct() {
        $this->_init('workorder/workorderlineitem');
    }
}


// Model/Mysql4/Workorderlineitem.php


/**
 * Workorderlineitem object Mysql4 resource model.
 * @author Christopher Pinto
 */
class Checkerboard_Workorder_Model_Mysql4_Workorderlineitem extends Mage_Core_Model_Mysql4_Abstract {
    protected function _construct() {
        $this->_init('workorder/workorderlineitem', 'entity_id');
    }
}



// Model/Mysql4/Workorderlineitem/Collection.php/**
 * Workorderlineitem object Mysql4 resource model collection.
 * @author Christopher Pinto
 */
class Checkerboard_Workorder_Model_Mysql4_Workorderlineitem_Collection extends Mage_Core_Model_Mysql4_Collection_Abstract {
    protected function _construct() {
        $this->_init('workorder/workorderlineitem');
    }
}

Answer 1

Your table name configuration you specified in the resource model's call to _init() can't be resolved in the configuration XML.
Update your post with the XML section under global/models to get more detailed information.

UPDATE: I don't know the primary key column name for your take, so I'll just use id here. Substitute with your PK column name.

All in all your code is quite unusual because you

1. have declared multiple model class groups in one module config.xml
2. have a workorderlineitem and a workorder module, but also have a workorderlineitem model within your workorder module

So assuming all this is on purpose and you know what you are doing, your _construct() method of your resource model declaration for your workorder/workorderlineitem model should look like this:

protected function _construct()
{
    $this->_init('workorder/workorderlineitem', 'id');
}

That would resolve to the table name workorder. That is, also assuming your resource model extends Mage_Core_Model_Resource_Db_Abstract, which it should.

To get more information, add your model and resource model classes (just the class declaration and the __construct/_construct methods.

UPDATE 2: The resource model code you added explains the issue. You use the following code to initialize the resource model:

$this->_init('workorder/workorderlineitem', 'entity_id');

But in your config XML you declare

...
<workorder_mysql4>
    <entities>
         <workorder><table>workorder</table></workorder>
    </entities>
</workorder_mysql4>

...

The part after the slash is mapped to a node within the <entities> node, which means you have to either use $this->_init('workorder/workorder', 'entity_id'); in your resource model, or .../workorder_mysql4/entities/workorderlineitem/table in the config XML.