[TYPO3-mvc] Tx_Extbase_Persistence_Exception

[Daniel Dimitrov]

Hey List,
I'm fighting with extbase for several hours now and I have the feeling that 
I'm loosing the battle :(

Actually I'm trying to do something very easy - at least it looks easy in 
the blog_example.

In my case I'm not building a blog component, but a shop :)

I'm showing a list with several products. Every product has a supplier.
I tried to build the relationship between the product and the supplier with 
tca and in the backend everything works. I'm able to choose a sipplier for 
my product.
Here is how the tca looks like:
$TCA['tx_bwshop_domain_model_products'] = array (
	'ctrl' => $TCA['tx_bwshop_domain_model_products']['ctrl'],
	'interface' => array (
		'showRecordFieldList' => 'hidden, supplier, title'
	),
	'feInterface' => $TCA['tx_bwshop_domain_model_products']['feInterface'],
	'columns' => array(
		'hidden' => array (
			'exclude' => 1,
			'label' => 'LLL:EXT:lang/locallang_general.xml:LGL.hidden',
			'config' => array (
				'type' => 'check',
				'default' => '0'
			)
		),
		'supplier' => Array (
			'label' => 'LLL:EXT:bw_securedl/locallang_db.xml:tx_bwshop_supplier',
			'config' => Array (
				'type' => 'select',
				'foreign_table' => 'tx_bwshop_domain_model_supplier',
				'maxitems' => 1,
				)
			),
		'title' => Array (
			'label' => 
'LLL:EXT:bw_securedl/locallang_db.xml:tx_bwshop_products.title',
			'config' => Array (
				'type' => 'input',
				'size' => '30',
				'eval' => 'trim',
				'max'  => '255',
			)
		),
		),
	'types' => array (
			'0' => array('showitem' => 'supplier, title'),
	),
	'palettes' => array(
		'1' => array('showitem' => '')
	)
);
$TCA['tx_bwshop_domain_model_supplier'] = array (
	'ctrl' => $TCA['tx_bwshop_domain_model_supplier']['ctrl'],
	'interface' => array (
		'showRecordFieldList' => 'crdate,name'
	),
	'columns' => array (
		'name' => Array (
			'label' => 
'LLL:EXT:bw_securedl/locallang_db.xml:tx_bwshop_supplier.name',
			'config' => Array (
				'type' => 'input',
				'size' => '30',
				'eval' => 'trim',
				'max'  => '255'
			)
		),
		'street' => Array (
			'label' => 
'LLL:EXT:bw_securedl/locallang_db.xml:tx_bwshop_supplier.street',
			'config' => Array (
				'type' => 'input',
				'size' => '30',
				'eval' => 'trim',
				'max'  => '255'
			)
		),

	),
	'types' => array (
		'0' => array('showitem' => 'name,street'),
	),
	'palettes' => array (
		'1' => array('showitem' => ''),
	),
);

I've removed some field definitions to keep the example simple.

My products model looks like this:

class Tx_Bwshop_Domain_Model_Products extends 
Tx_Extbase_DomainObject_AbstractEntity {

	/**
	 * @var Tx_Bwshop_Domain_Model_Supplier
	 */
	protected $supplier;

	/**
	 * the product's title
	 * @var string
	 */
	protected $title;

	/**
	 * Getter for supplier
	 *
	 * @return Tx_Bwshop_Domain_Model_Supplier
	 */
	public function getSupplier() {
		return $this->supplier;
	}

	public function getTitle() {
		return $this->title;
	}

}

and my supplier model looks like this:

class Tx_Bwshop_Domain_Model_Supplier extends 
Tx_Extbase_DomainObject_AbstractEntity {

	/**
	 * the supplier name
	 * @var string
	 */
	protected $name;

	/**
	 * the supplier street
	 * @var string
	 */
	protected $street;

	/**
	 * the supplier city
	 * @return string
	 */
	public function getName() {
		return $this->name;
	}}

those models are placed in the right location:
myext/Classes/Domain/Model/products.php
myext/Classes/Domain/Model/supplier.php


When I try to load the page I get:
Tx_Extbase_Persistence_Exception
Could not determine a Data Map for given class name.

I tried to track down the problem and what I found out was that I get this 
error from here:
throw new Tx_Extbase_Persistence_Exception('Could not determine a Data Map 
for given class name.', 1256067130);
in the getDataMap function.
The classname that this function gets as parameter is 
Tx_Bwshop_Domain_Model_Supplier and I have this model

Any ideas what I do wrong?

Thanks in advance!
Daniel