Question

The following code is straight from the docs and should insert a row into the “test” table.

$row = &JTable::getInstance('test', 'Table');
if (!$row->bind( array('user_id'=>123, 'customer_id'=>1234) )) {
    return JError::raiseWarning( 500, $row->getError() );
}
if (!$row->store()) {
    JError::raiseError(500, $row->getError() );
}

My table class looks like this:

class TableTest extends JTable
{
    var $user_id = null;
    var $customer_id = null;

    function __construct(&$db)
    {
        parent::__construct( '#__ipwatch', 'user_id', $db );
    }   

}

SELECT queries work fine, but not INSERT ones. Through debugging I find that the query being executed is UPDATE jos_test SET customer_id='1234' WHERE user_id='123', which fails because the row doesn’t exist yet in the database (should INSERT instead of UPDATE).

---

While digging through the Joomla code I find this:

function __construct( $table, $key, &$db )
{
    $this->_tbl     = $table;
    $this->_tbl_key = $key;
    $this->_db      =& $db;
}

    .....
    .....

function store( $updateNulls=false )
{
    $k = $this->_tbl_key;

    if( $this->$k)
    {
        $ret = $this->_db->updateObject( $this->_tbl, $this, $this->_tbl_key, $updateNulls );
    }
    else
    {
        $ret = $this->_db->insertObject( $this->_tbl, $this, $this->_tbl_key );
    }
    if( !$ret )
    {
        $this->setError(get_class( $this ).'::store failed - '.$this->_db->getErrorMsg());
        return false;
    }
    else
    {
        return true;
    }
}

_tbl_key here is “user_id” that I passed in my TableTest class, so it would appear that it will always call updateObject() when this key is set. Which is baffling.

Anyone have any insight?

Answer 1

function store( $updateNulls=false )
{
    // You set user_id so this branch is executed
    if( $this->$k)
    {
        $ret = $this->_db->updateObject( $this->_tbl, $this, $this->_tbl_key, $updateNulls );
    }
    // ...

Looking at the code it seems to me that store() check if the primary key field is present and if it use updateObject(). This means if you want to store a new user you can’t specify the user_id.