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<?php
/**
* ColumnSchema class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2012 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db\dao\mysql;
/**
* ColumnSchema class describes the column meta data of a MySQL table.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class ColumnSchema extends \yii\db\dao\ColumnSchema
{
/**
* Extracts the PHP type from DB type.
* @param string $dbType DB type
*/
public function initTypes($dbType)
{
static $typeMap = array( // dbType => type
'tinyint' => 'smallint',
'bit' => 'smallint',
'smallint' => 'smallint',
'mediumint' => 'integer',
'int' => 'integer',
'integer' => 'integer',
'bigint' => 'bigint',
'float' => 'float',
'double' => 'float',
'real' => 'float',
'decimal' => 'decimal',
'numeric' => 'decimal',
'tinytext' => 'text',
'mediumtext' => 'text',
'longtext' => 'text',
'text' => 'text',
'varchar' => 'string',
'string' => 'string',
'char' => 'string',
'datetime' => 'datetime',
'year' => 'date',
'date' => 'date',
'time' => 'time',
'timestamp' => 'timestamp',
'enum' => 'enum',
);
$this->dbType = $dbType;
$this->type = 'string';
$this->unsigned = strpos($this->dbType, 'unsigned') !== false;
if (preg_match('/^(\w+)(?:\(([^\)]+)\))?/', $this->dbType, $matches)) {
$type = $matches[1];
if (isset($typeMap[$type])) {
$this->type = $typeMap[$type];
}
if (!empty($matches[2])) {
if ($this->type === 'enum') {
$values = explode(',', $matches[2]);
foreach ($values as $i => $value) {
$values[$i] = trim($value, "'");
}
$this->enumValues = $values;
}
else {
$values = explode(',', $matches[2]);
$this->size = $this->precision = (int)$values[0];
if (isset($values[1])) {
$this->scale = (int)$values[1];
}
if ($this->size === 1 && ($type === 'tinyint' || $type === 'bit')) {
$this->type = 'boolean';
}
elseif ($type === 'bit') {
if ($this->size > 32) {
$this->type = 'bigint';
}
elseif ($this->size === 32) {
$this->type = 'integer';
}
}
}
}
}
$this->phpType = $this->getPhpType();
}
/**
* Extracts the default value for the column.
* The value is typecasted to correct PHP type.
* @param mixed $defaultValue the default value obtained from metadata
*/
public function initDefaultValue($defaultValue)
{
if ($this->type === 'timestamp' && $defaultValue === 'CURRENT_TIMESTAMP') {
$this->defaultValue = null;
}
else {
$this->defaultValue = $this->typecast($defaultValue);
}
}
}