You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 

76 lines
1.9 KiB

<?php
namespace yii\db\ar;
use yii\db\Exception;
/**
* ActiveMetaData represents the meta-data for an Active Record class.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class ActiveMetaData
{
/**
* @var TableSchema the table schema information
*/
public $table;
/**
* @var array list of relations
*/
public $relations = array();
/**
* Constructor.
* @param string $modelClass the model class name
*/
public function __construct($modelClass)
{
$tableName = $modelClass::tableName();
$table = $modelClass::getDbConnection()->getDriver()->getTableSchema($tableName);
if ($table === null) {
throw new Exception("Unable to find table '$tableName' for ActiveRecord class '$modelClass'.");
}
if ($table->primaryKey === null) {
$primaryKey = $modelClass::primaryKey();
if ($primaryKey !== null) {
$table->fixPrimaryKey($primaryKey);
} else {
throw new Exception("The table '$tableName' for ActiveRecord class '$modelClass' does not have a primary key.");
}
}
$this->table = $table;
foreach ($modelClass::relations() as $name => $config) {
$this->addRelation($name, $config);
}
}
/**
* Adds a relation.
*
* $config is an array with three elements:
* relation type, the related active record class and the foreign key.
*
* @throws Exception
* @param string $name $name Name of the relation.
* @param array $config $config Relation parameters.
* @return void
*/
public function addRelation($name, $config)
{
if (preg_match('/^(\w+)\s*:\s*\\\\?([\w\\\\]+)(\[\])?$/', $name, $matches)) {
if (is_string($config)) {
$config = array('on' => $config);
}
$relation = ActiveRelation::newInstance($config);
$relation->name = $matches[1];
$relation->modelClass = '\\' . $matches[2];
$relation->hasMany = isset($matches[3]);
$this->relations[$relation->name] = $relation;
} else {
throw new Exception("Relation name in bad format: $name");
}
}
}