/**
* Retrieve the value of this field for the associated row, if available.
*
* @throws Exception
* @return mixed
*/
public function getValue()
{
if (!$this->row) {
throw new Exception("Attempting to retrieve value for {$this->name} field with no row assigned.");
}
return $this->row->get($this->name);
}
/**
* Using the supplied source table row, retrieve the initial value for
* this relationship. This is typically called by \Dewdrop\Db\Row when
* get() is first called for this relationship.
*
* @param Row $row
* @return array
*/
public function loadInitialValue(Row $row)
{
$value = $row->get($this->getSourceColumnName());
// If the anchor column has no value, we can assume this relationship has no value
if (!$value) {
return array();
}
$db = $row->getTable()->getAdapter();
$stmt = $db->select();
$whereName = $db->quoteIdentifier("{$this->xrefTableName}.{$this->getXrefAnchorColumnName()}");
$stmt->from($this->xrefTableName, array($this->getXrefReferenceColumnName()))->where("{$whereName} = ?", $value);
return $db->fetchCol($stmt);
}
/**
* Load the initial value for the supplied attribute name. If the supplied
* row is new (i.e. no primary key value), then we use the default value
* for the attribute. Otherwise, we query that appropriate value table.
*
* @param Row $row
* @param string $name
*/
public function loadInitialValue(Row $row, $name)
{
$db = $this->table->getAdapter();
$attribute = $this->getAttribute($name);
if ($row->isNew()) {
return $attribute['default_value'];
} else {
$valueTable = $this->getBackendTypeTableName($attribute['backend_type']);
$stmt = $db->select()->from($valueTable, array('value'))->where('attribute_id = ?', $attribute['attribute_id']);
foreach ($this->table->getPrimaryKey() as $keyColumn) {
$keyQuoted = $db->quoteIdentifier("{$valueTable}.{$keyColumn}");
$stmt->where("{$keyQuoted} = ?", $row->get($keyColumn));
}
return $db->fetchOne($stmt);
}
}
/**
* Apply the supplied default values to the row, skipping any fields
* that already have a value.
*
* @param Row $row
* @param array $defaults
* @return $this
* @throws \Dewdrop\Exception
*/
public function applyDefaultsToRow(Row $row, array $defaults)
{
foreach ($defaults as $key => $value) {
if (!$row->get($key)) {
if ($value instanceof FieldInterface) {
$value = $value->getValue();
}
$row->set($key, $value);
}
}
return $this;
}
