/**
* Fetches rows by primary key. The argument specifies one or more primary
* key value(s). To find multiple rows by primary key, the argument must
* be an array.
*
* This method accepts a variable number of arguments. If the table has a
* multi-column primary key, the number of arguments must be the same as
* the number of columns in the primary key. To find multiple rows in a
* table with a multi-column primary key, each argument must be an array
* with the same number of elements.
*
* The find() method always returns a Rowset object, even if only one row
* was found.
*
* @param mixed $key The value(s) of the primary keys.
* @return \Micro\Database\Table\Rowset\RowsetAbstract Row(s) matching the criteria.
* @throws \Micro\Database\Table\Exception
*/
public function find()
{
$this->_setupPrimaryKey();
$args = func_get_args();
$keyNames = array_values((array) $this->_primary);
if (count($args) < count($keyNames)) {
throw new Exception("Too few columns for the primary key");
}
if (count($args) > count($keyNames)) {
throw new Exception("Too many columns for the primary key");
}
$whereList = array();
$numberTerms = 0;
foreach ($args as $keyPosition => $keyValues) {
$keyValuesCount = count($keyValues);
// Coerce the values to an array.
// Don't simply typecast to array, because the values
// might be \Micro\Database\Expr objects.
if (!is_array($keyValues)) {
$keyValues = array($keyValues);
}
if ($numberTerms == 0) {
$numberTerms = $keyValuesCount;
} else {
if ($keyValuesCount != $numberTerms) {
throw new Exception("Missing value(s) for the primary key");
}
}
$keyValues = array_values($keyValues);
for ($i = 0; $i < $keyValuesCount; ++$i) {
if (!isset($whereList[$i])) {
$whereList[$i] = array();
}
$whereList[$i][$keyPosition] = $keyValues[$i];
}
}
$whereClause = null;
if (count($whereList)) {
$whereOrTerms = array();
$tableName = $this->_db->quoteTableAs($this->_name, null, true);
foreach ($whereList as $keyValueSets) {
$whereAndTerms = array();
foreach ($keyValueSets as $keyPosition => $keyValue) {
$type = $this->_metadata[$keyNames[$keyPosition]]['DATA_TYPE'];
$columnName = $this->_db->quoteIdentifier($keyNames[$keyPosition], true);
$whereAndTerms[] = $this->_db->quoteInto($tableName . '.' . $columnName . ' = ?', $keyValue, $type);
}
$whereOrTerms[] = '(' . implode(' AND ', $whereAndTerms) . ')';
}
$whereClause = '(' . implode(' OR ', $whereOrTerms) . ')';
}
if ($whereClause == null) {
$rowsetClass = $this->getRowsetClass();
if (!class_exists($rowsetClass)) {
throw new Exception("Class '{$rowsetClass}' does not exists");
}
return new $rowsetClass(array('table' => $this, 'rowClass' => $this->getRowClass(), 'stored' => true));
}
return $this->fetchAll($whereClause);
}
/**
* Internal function for creating the where clause
*
* @param string $condition
* @param mixed $value optional
* @param string $type optional
* @param boolean $bool true = AND, false = OR
* @return string clause
*/
protected function _where($condition, $value = null, $type = null, $bool = true)
{
if (count($this->_parts[self::UNION])) {
throw new \Micro\Database\Select\Exception("Invalid use of where clause with " . self::SQL_UNION);
}
if ($value !== null) {
$condition = $this->_adapter->quoteInto($condition, $value, $type);
}
$cond = "";
if ($this->_parts[self::WHERE]) {
if ($bool === true) {
$cond = self::SQL_AND . ' ';
} else {
$cond = self::SQL_OR . ' ';
}
}
return $cond . "({$condition})";
}
