/**
* If we use fields like combo box we have to set a data source.
* By default we'll take the data source primary key as value field
* and the first fiels (not pk) as description.
* @param P4A_Data_Source $data_source
* @return P4A_Field
*/
public function setSource($data_source)
{
unset($this->data);
if ($data_source === null) {
return $this;
}
$this->data =& $data_source;
$pk = $this->data->getPk();
if (is_string($pk)) {
if ($this->getSourceValueField() === null) {
$this->setSourceValueField($pk);
}
if ($this->getSourceDescriptionField() === null) {
$num_fields = $this->data->fields->getNumItems();
$fields = $this->data->fields->getNames();
$pk = $this->getSourceValueField();
if ($num_fields == 1) {
$description_field = $pk;
} else {
foreach ($fields as $field) {
if ($field != $pk) {
$description_field = $field;
break;
}
}
}
$this->setSourceDescriptionField($description_field);
}
} elseif (is_array($pk)) {
trigger_error("Only single primary key is allowed", E_USER_ERROR);
} elseif (is_null($pk)) {
trigger_error("Please define a primary key", E_USER_ERROR);
}
return $this;
}
/**
* If we use fields like combo box we have to set a data source.
* By default we'll take the data source primary key as value field
* and the first fiels (not pk) as description.
* @param P4A_Data_Source $data_source
* @return P4A_Table_Col
*/
public function setSource(P4A_Data_Source $data_source)
{
$this->data = $data_source;
$pk = $this->data->getPk();
if ($pk !== null) {
if ($this->getSourceValueField() === null) {
if (is_array($pk)) {
trigger_error("P4A_Table::setSource(): Columns support only one primary key");
} else {
$this->setSourceValueField($pk);
}
}
if ($this->getSourceDescriptionField() === null) {
$source_value = $this->getSourceValueField();
$names = $this->data->fields->getNames();
foreach ($names as $name) {
if ($name != $source_value) {
$this->setSourceDescriptionField($name);
break;
}
}
}
}
return $this;
}