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<?php
/**
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db;
use yii\base\InvalidConfigException;
use yii\helpers\Inflector;
use yii\helpers\StringHelper;
/**
* ActiveRecord is the base class for classes representing relational data in terms of objects.
*
* @include @yii/db/ActiveRecord.md
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @author Carsten Brandt <mail@cebe.cc>
* @since 2.0
*/
class ActiveRecord extends BaseActiveRecord
{
/**
* The insert operation. This is mainly used when overriding [[transactions()]] to specify which operations are transactional.
*/
const OP_INSERT = 0x01;
/**
* The update operation. This is mainly used when overriding [[transactions()]] to specify which operations are transactional.
*/
const OP_UPDATE = 0x02;
/**
* The delete operation. This is mainly used when overriding [[transactions()]] to specify which operations are transactional.
*/
const OP_DELETE = 0x04;
/**
* All three operations: insert, update, delete.
* This is a shortcut of the expression: OP_INSERT | OP_UPDATE | OP_DELETE.
*/
const OP_ALL = 0x07;
/**
* Returns the database connection used by this AR class.
* By default, the "db" application component is used as the database connection.
* You may override this method if you want to use a different database connection.
* @return Connection the database connection used by this AR class.
*/
public static function getDb()
{
return \Yii::$app->getDb();
}
/**
* Creates an [[ActiveQuery]] instance with a given SQL statement.
*
* Note that because the SQL statement is already specified, calling additional
* query modification methods (such as `where()`, `order()`) on the created [[ActiveQuery]]
* instance will have no effect. However, calling `with()`, `asArray()` or `indexBy()` is
* still fine.
*
* Below is an example:
*
* ~~~
* $customers = Customer::findBySql('SELECT * FROM tbl_customer')->all();
* ~~~
*
* @param string $sql the SQL statement to be executed
* @param array $params parameters to be bound to the SQL statement during execution.
* @return ActiveQuery the newly created [[ActiveQuery]] instance
*/
public static function findBySql($sql, $params = [])
{
$query = static::createQuery();
$query->sql = $sql;
return $query->params($params);
}
/**
* Updates the whole table using the provided attribute values and conditions.
* For example, to change the status to be 1 for all customers whose status is 2:
*
* ~~~
* Customer::updateAll(['status' => 1], 'status = 2');
* ~~~
*
* @param array $attributes attribute values (name-value pairs) to be saved into the table
* @param string|array $condition the conditions that will be put in the WHERE part of the UPDATE SQL.
* Please refer to [[Query::where()]] on how to specify this parameter.
* @param array $params the parameters (name => value) to be bound to the query.
* @return integer the number of rows updated
*/
public static function updateAll($attributes, $condition = '', $params = [])
{
$command = static::getDb()->createCommand();
$command->update(static::tableName(), $attributes, $condition, $params);
return $command->execute();
}
/**
* Updates the whole table using the provided counter changes and conditions.
* For example, to increment all customers' age by 1,
*
* ~~~
* Customer::updateAllCounters(['age' => 1]);
* ~~~
*
* @param array $counters the counters to be updated (attribute name => increment value).
* Use negative values if you want to decrement the counters.
* @param string|array $condition the conditions that will be put in the WHERE part of the UPDATE SQL.
* Please refer to [[Query::where()]] on how to specify this parameter.
* @param array $params the parameters (name => value) to be bound to the query.
* Do not name the parameters as `:bp0`, `:bp1`, etc., because they are used internally by this method.
* @return integer the number of rows updated
*/
public static function updateAllCounters($counters, $condition = '', $params = [])
{
$n = 0;
foreach ($counters as $name => $value) {
$counters[$name] = new Expression("[[$name]]+:bp{$n}", [":bp{$n}" => $value]);
$n++;
}
$command = static::getDb()->createCommand();
$command->update(static::tableName(), $counters, $condition, $params);
return $command->execute();
}
/**
* Deletes rows in the table using the provided conditions.
* WARNING: If you do not specify any condition, this method will delete ALL rows in the table.
*
* For example, to delete all customers whose status is 3:
*
* ~~~
* Customer::deleteAll('status = 3');
* ~~~
*
* @param string|array $condition the conditions that will be put in the WHERE part of the DELETE SQL.
* Please refer to [[Query::where()]] on how to specify this parameter.
* @param array $params the parameters (name => value) to be bound to the query.
* @return integer the number of rows deleted
*/
public static function deleteAll($condition = '', $params = [])
{
$command = static::getDb()->createCommand();
$command->delete(static::tableName(), $condition, $params);
return $command->execute();
}
/**
* Creates an [[ActiveQuery]] instance.
*
* This method is called by [[find()]], [[findBySql()]] to start a SELECT query.
* You may override this method to return a customized query (e.g. `CustomerQuery` specified
* written for querying `Customer` purpose.)
*
* You may also define default conditions that should apply to all queries unless overridden:
*
* ```php
* public static function createQuery()
* {
* return parent::createQuery()->where(['deleted' => false]);
* }
* ```
*
* Note that all queries should use [[Query::andWhere()]] and [[Query::orWhere()]] to keep the
* default condition. Using [[Query::where()]] will override the default condition.
*
* @return ActiveQuery the newly created [[ActiveQuery]] instance.
*/
public static function createQuery()
{
return new ActiveQuery(['modelClass' => get_called_class()]);
}
/**
* Declares the name of the database table associated with this AR class.
* By default this method returns the class name as the table name by calling [[Inflector::camel2id()]]
* with prefix 'tbl_'. For example, 'Customer' becomes 'tbl_customer', and 'OrderItem' becomes
* 'tbl_order_item'. You may override this method if the table is not named after this convention.
* @return string the table name
*/
public static function tableName()
{
return 'tbl_' . Inflector::camel2id(StringHelper::basename(get_called_class()), '_');
}
/**
* Returns the schema information of the DB table associated with this AR class.
* @return TableSchema the schema information of the DB table associated with this AR class.
* @throws InvalidConfigException if the table for the AR class does not exist.
*/
public static function getTableSchema()
{
$schema = static::getDb()->getTableSchema(static::tableName());
if ($schema !== null) {
return $schema;
} else {
throw new InvalidConfigException("The table does not exist: " . static::tableName());
}
}
/**
* Returns the primary key name(s) for this AR class.
* The default implementation will return the primary key(s) as declared
* in the DB table that is associated with this AR class.
*
* If the DB table does not declare any primary key, you should override
* this method to return the attributes that you want to use as primary keys
* for this AR class.
*
* Note that an array should be returned even for a table with single primary key.
*
* @return string[] the primary keys of the associated database table.
*/
public static function primaryKey()
{
return static::getTableSchema()->primaryKey;
}
/**
* Returns the list of all attribute names of the model.
* The default implementation will return all column names of the table associated with this AR class.
* @return array list of attribute names.
*/
public function attributes()
{
return array_keys(static::getTableSchema()->columns);
}
/**
* Declares which DB operations should be performed within a transaction in different scenarios.
* The supported DB operations are: [[OP_INSERT]], [[OP_UPDATE]] and [[OP_DELETE]],
* which correspond to the [[insert()]], [[update()]] and [[delete()]] methods, respectively.
* By default, these methods are NOT enclosed in a DB transaction.
*
* In some scenarios, to ensure data consistency, you may want to enclose some or all of them
* in transactions. You can do so by overriding this method and returning the operations
* that need to be transactional. For example,
*
* ~~~
* return [
* 'admin' => self::OP_INSERT,
* 'api' => self::OP_INSERT | self::OP_UPDATE | self::OP_DELETE,
* // the above is equivalent to the following:
* // 'api' => self::OP_ALL,
*
* ];
* ~~~
*
* The above declaration specifies that in the "admin" scenario, the insert operation ([[insert()]])
* should be done in a transaction; and in the "api" scenario, all the operations should be done
* in a transaction.
*
* @return array the declarations of transactional operations. The array keys are scenarios names,
* and the array values are the corresponding transaction operations.
*/
public function transactions()
{
return [];
}
/**
* Creates an [[ActiveRelation]] instance.
* This method is called by [[hasOne()]] and [[hasMany()]] to create a relation instance.
* You may override this method to return a customized relation.
* @param array $config the configuration passed to the ActiveRelation class.
* @return ActiveRelation the newly created [[ActiveRelation]] instance.
*/
public static function createActiveRelation($config = [])
{
return new ActiveRelation($config);
}
/**
* Inserts a row into the associated database table using the attribute values of this record.
*
* This method performs the following steps in order:
*
* 1. call [[beforeValidate()]] when `$runValidation` is true. If validation
* fails, it will skip the rest of the steps;
* 2. call [[afterValidate()]] when `$runValidation` is true.
* 3. call [[beforeSave()]]. If the method returns false, it will skip the
* rest of the steps;
* 4. insert the record into database. If this fails, it will skip the rest of the steps;
* 5. call [[afterSave()]];
*
* In the above step 1, 2, 3 and 5, events [[EVENT_BEFORE_VALIDATE]],
* [[EVENT_BEFORE_INSERT]], [[EVENT_AFTER_INSERT]] and [[EVENT_AFTER_VALIDATE]]
* will be raised by the corresponding methods.
*
* Only the [[dirtyAttributes|changed attribute values]] will be inserted into database.
*
* If the table's primary key is auto-incremental and is null during insertion,
* it will be populated with the actual value after insertion.
*
* For example, to insert a customer record:
*
* ~~~
* $customer = new Customer;
* $customer->name = $name;
* $customer->email = $email;
* $customer->insert();
* ~~~
*
* @param boolean $runValidation whether to perform validation before saving the record.
* If the validation fails, the record will not be inserted into the database.
* @param array $attributes list of attributes that need to be saved. Defaults to null,
* meaning all attributes that are loaded from DB will be saved.
* @return boolean whether the attributes are valid and the record is inserted successfully.
* @throws \Exception in case insert failed.
*/
public function insert($runValidation = true, $attributes = null)
{
if ($runValidation && !$this->validate($attributes)) {
return false;
}
$db = static::getDb();
if ($this->isTransactional(self::OP_INSERT) && $db->getTransaction() === null) {
$transaction = $db->beginTransaction();
try {
$result = $this->insertInternal($attributes);
if ($result === false) {
$transaction->rollback();
} else {
$transaction->commit();
}
} catch (\Exception $e) {
$transaction->rollback();
throw $e;
}
} else {
$result = $this->insertInternal($attributes);
}
return $result;
}
/**
* @see ActiveRecord::insert()
*/
private function insertInternal($attributes = null)
{
if (!$this->beforeSave(true)) {
return false;
}
$values = $this->getDirtyAttributes($attributes);
if (empty($values)) {
foreach ($this->getPrimaryKey(true) as $key => $value) {
$values[$key] = $value;
}
}
$db = static::getDb();
$command = $db->createCommand()->insert($this->tableName(), $values);
if (!$command->execute()) {
return false;
}
$table = $this->getTableSchema();
if ($table->sequenceName !== null) {
foreach ($table->primaryKey as $name) {
if ($this->getAttribute($name) === null) {
$id = $db->getLastInsertID($table->sequenceName);
$this->setAttribute($name, $id);
$this->setOldAttribute($name, $id);
break;
}
}
}
foreach ($values as $name => $value) {
$this->setOldAttribute($name, $value);
}
$this->afterSave(true);
return true;
}
/**
* Saves the changes to this active record into the associated database table.
*
* This method performs the following steps in order:
*
* 1. call [[beforeValidate()]] when `$runValidation` is true. If validation
* fails, it will skip the rest of the steps;
* 2. call [[afterValidate()]] when `$runValidation` is true.
* 3. call [[beforeSave()]]. If the method returns false, it will skip the
* rest of the steps;
* 4. save the record into database. If this fails, it will skip the rest of the steps;
* 5. call [[afterSave()]];
*
* In the above step 1, 2, 3 and 5, events [[EVENT_BEFORE_VALIDATE]],
* [[EVENT_BEFORE_UPDATE]], [[EVENT_AFTER_UPDATE]] and [[EVENT_AFTER_VALIDATE]]
* will be raised by the corresponding methods.
*
* Only the [[changedAttributes|changed attribute values]] will be saved into database.
*
* For example, to update a customer record:
*
* ~~~
* $customer = Customer::find($id);
* $customer->name = $name;
* $customer->email = $email;
* $customer->update();
* ~~~
*
* Note that it is possible the update does not affect any row in the table.
* In this case, this method will return 0. For this reason, you should use the following
* code to check if update() is successful or not:
*
* ~~~
* if ($this->update() !== false) {
* // update successful
* } else {
* // update failed
* }
* ~~~
*
* @param boolean $runValidation whether to perform validation before saving the record.
* If the validation fails, the record will not be inserted into the database.
* @param array $attributes list of attributes that need to be saved. Defaults to null,
* meaning all attributes that are loaded from DB will be saved.
* @return integer|boolean the number of rows affected, or false if validation fails
* or [[beforeSave()]] stops the updating process.
* @throws StaleObjectException if [[optimisticLock|optimistic locking]] is enabled and the data
* being updated is outdated.
* @throws \Exception in case update failed.
*/
public function update($runValidation = true, $attributes = null)
{
if ($runValidation && !$this->validate($attributes)) {
return false;
}
$db = static::getDb();
if ($this->isTransactional(self::OP_UPDATE) && $db->getTransaction() === null) {
$transaction = $db->beginTransaction();
try {
$result = $this->updateInternal($attributes);
if ($result === false) {
$transaction->rollback();
} else {
$transaction->commit();
}
} catch (\Exception $e) {
$transaction->rollback();
throw $e;
}
} else {
$result = $this->updateInternal($attributes);
}
return $result;
}
/**
* Deletes the table row corresponding to this active record.
*
* This method performs the following steps in order:
*
* 1. call [[beforeDelete()]]. If the method returns false, it will skip the
* rest of the steps;
* 2. delete the record from the database;
* 3. call [[afterDelete()]].
*
* In the above step 1 and 3, events named [[EVENT_BEFORE_DELETE]] and [[EVENT_AFTER_DELETE]]
* will be raised by the corresponding methods.
*
* @return integer|boolean the number of rows deleted, or false if the deletion is unsuccessful for some reason.
* Note that it is possible the number of rows deleted is 0, even though the deletion execution is successful.
* @throws StaleObjectException if [[optimisticLock|optimistic locking]] is enabled and the data
* being deleted is outdated.
* @throws \Exception in case delete failed.
*/
public function delete()
{
$db = static::getDb();
$transaction = $this->isTransactional(self::OP_DELETE) && $db->getTransaction() === null ? $db->beginTransaction() : null;
try {
$result = false;
if ($this->beforeDelete()) {
// we do not check the return value of deleteAll() because it's possible
// the record is already deleted in the database and thus the method will return 0
$condition = $this->getOldPrimaryKey(true);
$lock = $this->optimisticLock();
if ($lock !== null) {
$condition[$lock] = $this->$lock;
}
$result = $this->deleteAll($condition);
if ($lock !== null && !$result) {
throw new StaleObjectException('The object being deleted is outdated.');
}
$this->setOldAttributes(null);
$this->afterDelete();
}
if ($transaction !== null) {
if ($result === false) {
$transaction->rollback();
} else {
$transaction->commit();
}
}
} catch (\Exception $e) {
if ($transaction !== null) {
$transaction->rollback();
}
throw $e;
}
return $result;
}
/**
* Returns a value indicating whether the given active record is the same as the current one.
* The comparison is made by comparing the table names and the primary key values of the two active records.
* If one of the records [[isNewRecord|is new]] they are also considered not equal.
* @param ActiveRecord $record record to compare to
* @return boolean whether the two active records refer to the same row in the same database table.
*/
public function equals($record)
{
if ($this->isNewRecord || $record->isNewRecord) {
return false;
}
return $this->tableName() === $record->tableName() && $this->getPrimaryKey() === $record->getPrimaryKey();
}
/**
* Returns a value indicating whether the specified operation is transactional in the current [[scenario]].
* @param integer $operation the operation to check. Possible values are [[OP_INSERT]], [[OP_UPDATE]] and [[OP_DELETE]].
* @return boolean whether the specified operation is transactional in the current [[scenario]].
*/
public function isTransactional($operation)
{
$scenario = $this->getScenario();
$transactions = $this->transactions();
return isset($transactions[$scenario]) && ($transactions[$scenario] & $operation);
}
}