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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db;
use yii\base\BaseObject;
use yii\base\InvalidArgumentException;
/**
* TableSchema represents the metadata of a database table.
*
* @property array $columnNames List of column names. This property is read-only.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class TableSchema extends BaseObject
{
/**
* @var string the name of the schema that this table belongs to.
*/
public $schemaName;
/**
* @var string the name of this table. The schema name is not included. Use [[fullName]] to get the name with schema name prefix.
*/
public $name;
/**
* @var string the full name of this table, which includes the schema name prefix, if any.
* Note that if the schema name is the same as the [[Schema::defaultSchema|default schema name]],
* the schema name will not be included.
*/
public $fullName;
/**
* @var string[] primary keys of this table.
*/
public $primaryKey = [];
/**
* @var string sequence name for the primary key. Null if no sequence.
*/
public $sequenceName;
/**
* @var array foreign keys of this table. Each array element is of the following structure:
*
* ```php
* [
* 'ForeignTableName',
* 'fk1' => 'pk1', // pk1 is in foreign table
* 'fk2' => 'pk2', // if composite foreign key
* ]
* ```
*/
public $foreignKeys = [];
/**
* @var ColumnSchema[] column metadata of this table. Each array element is a [[ColumnSchema]] object, indexed by column names.
*/
public $columns = [];
/**
* Gets the named column metadata.
* This is a convenient method for retrieving a named column even if it does not exist.
* @param string $name column name
* @return ColumnSchema metadata of the named column. Null if the named column does not exist.
*/
public function getColumn($name)
{
return isset($this->columns[$name]) ? $this->columns[$name] : null;
}
/**
* Returns the names of all columns in this table.
* @return array list of column names
*/
public function getColumnNames()
{
return array_keys($this->columns);
}
/**
* Manually specifies the primary key for this table.
* @param string|array $keys the primary key (can be composite)
* @throws InvalidArgumentException if the specified key cannot be found in the table.
*/
public function fixPrimaryKey($keys)
{
$keys = (array) $keys;
$this->primaryKey = $keys;
foreach ($this->columns as $column) {
$column->isPrimaryKey = false;
}
foreach ($keys as $key) {
if (isset($this->columns[$key])) {
$this->columns[$key]->isPrimaryKey = true;
} else {
throw new InvalidArgumentException("Primary key '$key' cannot be found in table '{$this->name}'.");
}
}
}
}