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649 lines
25 KiB
PHP
649 lines
25 KiB
PHP
<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\db;
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use Yii;
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use yii\base\InvalidConfigException;
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use yii\helpers\ArrayHelper;
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use yii\helpers\Inflector;
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use yii\helpers\StringHelper;
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/**
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* ActiveRecord is the base class for classes representing relational data in terms of objects.
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*
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* Active Record implements the [Active Record design pattern](http://en.wikipedia.org/wiki/Active_record).
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* The premise behind Active Record is that an individual [[ActiveRecord]] object is associated with a specific
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* row in a database table. The object's attributes are mapped to the columns of the corresponding table.
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* Referencing an Active Record attribute is equivalent to accessing the corresponding table column for that record.
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*
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* As an example, say that the `Customer` ActiveRecord class is associated with the `customer` table.
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* This would mean that the class's `name` attribute is automatically mapped to the `name` column in `customer` table.
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* Thanks to Active Record, assuming the variable `$customer` is an object of type `Customer`, to get the value of
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* the `name` column for the table row, you can use the expression `$customer->name`.
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* In this example, Active Record is providing an object-oriented interface for accessing data stored in the database.
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* But Active Record provides much more functionality than this.
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*
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* To declare an ActiveRecord class you need to extend [[\yii\db\ActiveRecord]] and
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* implement the `tableName` method:
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*
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* ```php
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* <?php
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*
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* class Customer extends \yii\db\ActiveRecord
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* {
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* public static function tableName()
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* {
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* return 'customer';
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* }
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* }
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* ```
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*
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* The `tableName` method only has to return the name of the database table associated with the class.
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*
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* > Tip: You may also use the [Gii code generator][guide-gii] to generate ActiveRecord classes from your
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* > database tables.
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*
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* Class instances are obtained in one of two ways:
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*
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* * Using the `new` operator to create a new, empty object
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* * Using a method to fetch an existing record (or records) from the database
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*
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* Here is a short teaser how working with an ActiveRecord looks like:
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*
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* ```php
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* $user = new User();
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* $user->name = 'Qiang';
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* $user->save(); // a new row is inserted into user table
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*
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* // the following will retrieve the user 'CeBe' from the database
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* $user = User::find()->where(['name' => 'CeBe'])->one();
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*
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* // this will get related records from orders table when relation is defined
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* $orders = $user->orders;
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* ```
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*
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* For more details and usage information on ActiveRecord, see the [guide article on ActiveRecord][guide-active-record].
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*
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* @method ActiveQuery hasMany(string $class, array $link) see BaseActiveRecord::hasMany() for more info
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* @method ActiveQuery hasOne(string $class, array $link) see BaseActiveRecord::hasOne() for more info
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @author Carsten Brandt <mail@cebe.cc>
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* @since 2.0
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*/
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class ActiveRecord extends BaseActiveRecord
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{
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/**
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* The insert operation. This is mainly used when overriding [[transactions()]] to specify which operations are transactional.
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*/
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const OP_INSERT = 0x01;
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/**
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* The update operation. This is mainly used when overriding [[transactions()]] to specify which operations are transactional.
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*/
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const OP_UPDATE = 0x02;
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/**
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* The delete operation. This is mainly used when overriding [[transactions()]] to specify which operations are transactional.
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*/
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const OP_DELETE = 0x04;
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/**
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* All three operations: insert, update, delete.
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* This is a shortcut of the expression: OP_INSERT | OP_UPDATE | OP_DELETE.
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*/
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const OP_ALL = 0x07;
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/**
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* Loads default values from database table schema
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*
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* @param boolean $skipIfSet if existing value should be preserved
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* @return static model instance
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*/
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public function loadDefaultValues($skipIfSet = true)
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{
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foreach ($this->getTableSchema()->columns as $column) {
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if ($column->defaultValue !== null && (!$skipIfSet || $this->{$column->name} === null)) {
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$this->{$column->name} = $column->defaultValue;
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}
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}
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return $this;
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}
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/**
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* Returns the database connection used by this AR class.
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* By default, the "db" application component is used as the database connection.
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* You may override this method if you want to use a different database connection.
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* @return Connection the database connection used by this AR class.
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*/
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public static function getDb()
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{
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return Yii::$app->getDb();
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}
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/**
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* Creates an [[ActiveQuery]] instance with a given SQL statement.
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*
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* Note that because the SQL statement is already specified, calling additional
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* query modification methods (such as `where()`, `order()`) on the created [[ActiveQuery]]
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* instance will have no effect. However, calling `with()`, `asArray()` or `indexBy()` is
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* still fine.
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*
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* Below is an example:
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*
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* ~~~
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* $customers = Customer::findBySql('SELECT * FROM customer')->all();
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* ~~~
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*
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* @param string $sql the SQL statement to be executed
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* @param array $params parameters to be bound to the SQL statement during execution.
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* @return ActiveQuery the newly created [[ActiveQuery]] instance
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*/
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public static function findBySql($sql, $params = [])
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{
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$query = static::find();
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$query->sql = $sql;
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return $query->params($params);
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}
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/**
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* Finds ActiveRecord instance(s) by the given condition.
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* This method is internally called by [[findOne()]] and [[findAll()]].
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* @param mixed $condition please refer to [[findOne()]] for the explanation of this parameter
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* @param boolean $one whether this method is called by [[findOne()]] or [[findAll()]]
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* @return static|static[]
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* @throws InvalidConfigException if there is no primary key defined
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* @internal
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*/
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protected static function findByCondition($condition, $one)
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{
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$query = static::find();
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if (!ArrayHelper::isAssociative($condition)) {
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// query by primary key
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$primaryKey = static::primaryKey();
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if (isset($primaryKey[0])) {
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$pk = $primaryKey[0];
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if (!empty($query->join) || !empty($query->joinWith)) {
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$pk = static::tableName() . '.' . $pk;
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}
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$condition = [$pk => $condition];
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} else {
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throw new InvalidConfigException(get_called_class() . ' must have a primary key.');
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}
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}
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return $one ? $query->andWhere($condition)->one() : $query->andWhere($condition)->all();
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}
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/**
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* Updates the whole table using the provided attribute values and conditions.
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* For example, to change the status to be 1 for all customers whose status is 2:
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*
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* ~~~
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* Customer::updateAll(['status' => 1], 'status = 2');
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* ~~~
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*
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* @param array $attributes attribute values (name-value pairs) to be saved into the table
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* @param string|array $condition the conditions that will be put in the WHERE part of the UPDATE SQL.
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* Please refer to [[Query::where()]] on how to specify this parameter.
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* @param array $params the parameters (name => value) to be bound to the query.
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* @return integer the number of rows updated
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*/
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public static function updateAll($attributes, $condition = '', $params = [])
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{
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$command = static::getDb()->createCommand();
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$command->update(static::tableName(), $attributes, $condition, $params);
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return $command->execute();
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}
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/**
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* Updates the whole table using the provided counter changes and conditions.
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* For example, to increment all customers' age by 1,
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*
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* ~~~
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* Customer::updateAllCounters(['age' => 1]);
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* ~~~
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*
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* @param array $counters the counters to be updated (attribute name => increment value).
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* Use negative values if you want to decrement the counters.
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* @param string|array $condition the conditions that will be put in the WHERE part of the UPDATE SQL.
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* Please refer to [[Query::where()]] on how to specify this parameter.
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* @param array $params the parameters (name => value) to be bound to the query.
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* Do not name the parameters as `:bp0`, `:bp1`, etc., because they are used internally by this method.
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* @return integer the number of rows updated
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*/
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public static function updateAllCounters($counters, $condition = '', $params = [])
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{
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$n = 0;
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foreach ($counters as $name => $value) {
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$counters[$name] = new Expression("[[$name]]+:bp{$n}", [":bp{$n}" => $value]);
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$n++;
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}
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$command = static::getDb()->createCommand();
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$command->update(static::tableName(), $counters, $condition, $params);
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return $command->execute();
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}
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/**
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* Deletes rows in the table using the provided conditions.
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* WARNING: If you do not specify any condition, this method will delete ALL rows in the table.
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*
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* For example, to delete all customers whose status is 3:
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*
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* ~~~
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* Customer::deleteAll('status = 3');
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* ~~~
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*
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* @param string|array $condition the conditions that will be put in the WHERE part of the DELETE SQL.
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* Please refer to [[Query::where()]] on how to specify this parameter.
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* @param array $params the parameters (name => value) to be bound to the query.
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* @return integer the number of rows deleted
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*/
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public static function deleteAll($condition = '', $params = [])
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{
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$command = static::getDb()->createCommand();
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$command->delete(static::tableName(), $condition, $params);
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return $command->execute();
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}
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/**
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* @inheritdoc
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*/
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public static function find()
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{
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return Yii::createObject(ActiveQuery::className(), [get_called_class()]);
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}
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/**
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* Declares the name of the database table associated with this AR class.
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* By default this method returns the class name as the table name by calling [[Inflector::camel2id()]]
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* with prefix [[Connection::tablePrefix]]. For example if [[Connection::tablePrefix]] is 'tbl_',
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* 'Customer' becomes 'tbl_customer', and 'OrderItem' becomes 'tbl_order_item'. You may override this method
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* if the table is not named after this convention.
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* @return string the table name
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*/
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public static function tableName()
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{
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return '{{%' . Inflector::camel2id(StringHelper::basename(get_called_class()), '_') . '}}';
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}
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/**
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* Returns the schema information of the DB table associated with this AR class.
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* @return TableSchema the schema information of the DB table associated with this AR class.
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* @throws InvalidConfigException if the table for the AR class does not exist.
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*/
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public static function getTableSchema()
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{
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$schema = static::getDb()->getTableSchema(static::tableName());
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if ($schema !== null) {
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return $schema;
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} else {
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throw new InvalidConfigException("The table does not exist: " . static::tableName());
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}
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}
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/**
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* Returns the primary key name(s) for this AR class.
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* The default implementation will return the primary key(s) as declared
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* in the DB table that is associated with this AR class.
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*
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* If the DB table does not declare any primary key, you should override
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* this method to return the attributes that you want to use as primary keys
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* for this AR class.
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*
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* Note that an array should be returned even for a table with single primary key.
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*
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* @return string[] the primary keys of the associated database table.
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*/
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public static function primaryKey()
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{
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return static::getTableSchema()->primaryKey;
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}
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/**
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* Returns the list of all attribute names of the model.
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* The default implementation will return all column names of the table associated with this AR class.
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* @return array list of attribute names.
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*/
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public function attributes()
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{
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return array_keys(static::getTableSchema()->columns);
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}
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/**
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* Declares which DB operations should be performed within a transaction in different scenarios.
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* The supported DB operations are: [[OP_INSERT]], [[OP_UPDATE]] and [[OP_DELETE]],
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* which correspond to the [[insert()]], [[update()]] and [[delete()]] methods, respectively.
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* By default, these methods are NOT enclosed in a DB transaction.
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*
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* In some scenarios, to ensure data consistency, you may want to enclose some or all of them
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* in transactions. You can do so by overriding this method and returning the operations
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* that need to be transactional. For example,
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*
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* ~~~
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* return [
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* 'admin' => self::OP_INSERT,
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* 'api' => self::OP_INSERT | self::OP_UPDATE | self::OP_DELETE,
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* // the above is equivalent to the following:
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* // 'api' => self::OP_ALL,
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*
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* ];
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* ~~~
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*
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* The above declaration specifies that in the "admin" scenario, the insert operation ([[insert()]])
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* should be done in a transaction; and in the "api" scenario, all the operations should be done
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* in a transaction.
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*
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* @return array the declarations of transactional operations. The array keys are scenarios names,
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* and the array values are the corresponding transaction operations.
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*/
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public function transactions()
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{
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return [];
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}
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/**
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* @inheritdoc
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*/
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public static function populateRecord($record, $row)
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{
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$columns = static::getTableSchema()->columns;
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foreach ($row as $name => $value) {
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if (isset($columns[$name])) {
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$row[$name] = $columns[$name]->phpTypecast($value);
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}
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}
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parent::populateRecord($record, $row);
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}
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/**
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* Inserts a row into the associated database table using the attribute values of this record.
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*
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* This method performs the following steps in order:
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*
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* 1. call [[beforeValidate()]] when `$runValidation` is true. If validation
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* fails, it will skip the rest of the steps;
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* 2. call [[afterValidate()]] when `$runValidation` is true.
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* 3. call [[beforeSave()]]. If the method returns false, it will skip the
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* rest of the steps;
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* 4. insert the record into database. If this fails, it will skip the rest of the steps;
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* 5. call [[afterSave()]];
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*
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* In the above step 1, 2, 3 and 5, events [[EVENT_BEFORE_VALIDATE]],
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* [[EVENT_BEFORE_INSERT]], [[EVENT_AFTER_INSERT]] and [[EVENT_AFTER_VALIDATE]]
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* will be raised by the corresponding methods.
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*
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* Only the [[dirtyAttributes|changed attribute values]] will be inserted into database.
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*
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* If the table's primary key is auto-incremental and is null during insertion,
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* it will be populated with the actual value after insertion.
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*
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* For example, to insert a customer record:
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*
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* ~~~
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* $customer = new Customer;
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* $customer->name = $name;
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* $customer->email = $email;
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* $customer->insert();
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* ~~~
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*
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* @param boolean $runValidation whether to perform validation before saving the record.
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* If the validation fails, the record will not be inserted into the database.
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* @param array $attributes list of attributes that need to be saved. Defaults to null,
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* meaning all attributes that are loaded from DB will be saved.
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* @return boolean whether the attributes are valid and the record is inserted successfully.
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* @throws \Exception in case insert failed.
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*/
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public function insert($runValidation = true, $attributes = null)
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{
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if ($runValidation && !$this->validate($attributes)) {
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Yii::info('Model not inserted due to validation error.', __METHOD__);
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return false;
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}
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$db = static::getDb();
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if ($this->isTransactional(self::OP_INSERT)) {
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$transaction = $db->beginTransaction();
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try {
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$result = $this->insertInternal($attributes);
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if ($result === false) {
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$transaction->rollBack();
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} else {
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$transaction->commit();
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}
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} catch (\Exception $e) {
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$transaction->rollBack();
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throw $e;
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}
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} else {
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$result = $this->insertInternal($attributes);
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}
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return $result;
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}
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/**
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* Inserts an ActiveRecord into DB without considering transaction.
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* @param array $attributes list of attributes that need to be saved. Defaults to null,
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* meaning all attributes that are loaded from DB will be saved.
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* @return boolean whether the record is inserted successfully.
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*/
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protected function insertInternal($attributes = null)
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{
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if (!$this->beforeSave(true)) {
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return false;
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}
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$values = $this->getDirtyAttributes($attributes);
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if (empty($values)) {
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foreach ($this->getPrimaryKey(true) as $key => $value) {
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$values[$key] = $value;
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}
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}
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$db = static::getDb();
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$command = $db->createCommand()->insert($this->tableName(), $values);
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if (!$command->execute()) {
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return false;
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}
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$table = $this->getTableSchema();
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if ($table->sequenceName !== null) {
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foreach ($table->primaryKey as $name) {
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if ($this->getAttribute($name) === null) {
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$id = $table->columns[$name]->phpTypecast($db->getLastInsertID($table->sequenceName));
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$this->setAttribute($name, $id);
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$values[$name] = $id;
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break;
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}
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}
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}
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$changedAttributes = array_fill_keys(array_keys($values), null);
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$this->setOldAttributes($values);
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$this->afterSave(true, $changedAttributes);
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return true;
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}
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/**
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* Saves the changes to this active record into the associated database table.
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*
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* This method performs the following steps in order:
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*
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* 1. call [[beforeValidate()]] when `$runValidation` is true. If validation
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* fails, it will skip the rest of the steps;
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* 2. call [[afterValidate()]] when `$runValidation` is true.
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* 3. call [[beforeSave()]]. If the method returns false, it will skip the
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* rest of the steps;
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* 4. save the record into database. If this fails, it will skip the rest of the steps;
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* 5. call [[afterSave()]];
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*
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* In the above step 1, 2, 3 and 5, events [[EVENT_BEFORE_VALIDATE]],
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* [[EVENT_BEFORE_UPDATE]], [[EVENT_AFTER_UPDATE]] and [[EVENT_AFTER_VALIDATE]]
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* will be raised by the corresponding methods.
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*
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* Only the [[dirtyAttributes|changed attribute values]] will be saved into database.
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*
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* For example, to update a customer record:
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*
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* ~~~
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* $customer = Customer::findOne($id);
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* $customer->name = $name;
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* $customer->email = $email;
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* $customer->update();
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* ~~~
|
|
*
|
|
* Note that it is possible the update does not affect any row in the table.
|
|
* In this case, this method will return 0. For this reason, you should use the following
|
|
* code to check if update() is successful or not:
|
|
*
|
|
* ~~~
|
|
* if ($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 $attributeNames list of attributes that need to be saved. Defaults to null,
|
|
* meaning all attributes that are loaded from DB will be saved.
|
|
* @return integer|boolean the number of rows affected, or false if validation fails
|
|
* or [[beforeSave()]] stops the updating process.
|
|
* @throws StaleObjectException if [[optimisticLock|optimistic locking]] is enabled and the data
|
|
* being updated is outdated.
|
|
* @throws \Exception in case update failed.
|
|
*/
|
|
public function update($runValidation = true, $attributeNames = null)
|
|
{
|
|
if ($runValidation && !$this->validate($attributeNames)) {
|
|
Yii::info('Model not updated due to validation error.', __METHOD__);
|
|
return false;
|
|
}
|
|
$db = static::getDb();
|
|
if ($this->isTransactional(self::OP_UPDATE)) {
|
|
$transaction = $db->beginTransaction();
|
|
try {
|
|
$result = $this->updateInternal($attributeNames);
|
|
if ($result === false) {
|
|
$transaction->rollBack();
|
|
} else {
|
|
$transaction->commit();
|
|
}
|
|
} catch (\Exception $e) {
|
|
$transaction->rollBack();
|
|
throw $e;
|
|
}
|
|
} else {
|
|
$result = $this->updateInternal($attributeNames);
|
|
}
|
|
|
|
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()
|
|
{
|
|
$db = static::getDb();
|
|
if ($this->isTransactional(self::OP_DELETE)) {
|
|
$transaction = $db->beginTransaction();
|
|
try {
|
|
$result = $this->deleteInternal();
|
|
if ($result === false) {
|
|
$transaction->rollBack();
|
|
} else {
|
|
$transaction->commit();
|
|
}
|
|
} catch (\Exception $e) {
|
|
$transaction->rollBack();
|
|
throw $e;
|
|
}
|
|
} else {
|
|
$result = $this->deleteInternal();
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Deletes an ActiveRecord without considering transaction.
|
|
* @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
|
|
*/
|
|
protected function deleteInternal()
|
|
{
|
|
$result = false;
|
|
if ($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();
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|