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BaseActiveRecord.php
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BaseActiveRecord.php
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<?php
/**
* @link https://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license https://www.yiiframework.com/license/
*/
namespace yii\db;
use Yii;
use yii\base\InvalidArgumentException;
use yii\base\InvalidCallException;
use yii\base\InvalidConfigException;
use yii\base\InvalidParamException;
use yii\base\Model;
use yii\base\ModelEvent;
use yii\base\NotSupportedException;
use yii\base\UnknownMethodException;
use yii\helpers\ArrayHelper;
/**
* ActiveRecord is the base class for classes representing relational data in terms of objects.
*
* See [[\yii\db\ActiveRecord]] for a concrete implementation.
*
* @property-read array $dirtyAttributes The changed attribute values (name-value pairs).
* @property bool $isNewRecord Whether the record is new and should be inserted when calling [[save()]].
* @property array $oldAttributes The old attribute values (name-value pairs). Note that the type of this
* property differs in getter and setter. See [[getOldAttributes()]] and [[setOldAttributes()]] for details.
* @property-read mixed $oldPrimaryKey The old primary key value. An array (column name => column value) is
* returned if the primary key is composite or `$asArray` is `true`. A string is returned otherwise (null will be
* returned if the key value is null).
* @property-read mixed $primaryKey The primary key value. An array (column name => column value) is returned
* if the primary key is composite or `$asArray` is `true`. A string is returned otherwise (null will be returned
* if the key value is null).
* @property-read array $relatedRecords An array of related records indexed by relation names.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @author Carsten Brandt <mail@cebe.cc>
* @since 2.0
*/
abstract class BaseActiveRecord extends Model implements ActiveRecordInterface
{
/**
* @event Event an event that is triggered when the record is initialized via [[init()]].
*/
const EVENT_INIT = 'init';
/**
* @event Event an event that is triggered after the record is created and populated with query result.
*/
const EVENT_AFTER_FIND = 'afterFind';
/**
* @event ModelEvent an event that is triggered before inserting a record.
* You may set [[ModelEvent::isValid]] to be `false` to stop the insertion.
*/
const EVENT_BEFORE_INSERT = 'beforeInsert';
/**
* @event AfterSaveEvent an event that is triggered after a record is inserted.
*/
const EVENT_AFTER_INSERT = 'afterInsert';
/**
* @event ModelEvent an event that is triggered before updating a record.
* You may set [[ModelEvent::isValid]] to be `false` to stop the update.
*/
const EVENT_BEFORE_UPDATE = 'beforeUpdate';
/**
* @event AfterSaveEvent an event that is triggered after a record is updated.
*/
const EVENT_AFTER_UPDATE = 'afterUpdate';
/**
* @event ModelEvent an event that is triggered before deleting a record.
* You may set [[ModelEvent::isValid]] to be `false` to stop the deletion.
*/
const EVENT_BEFORE_DELETE = 'beforeDelete';
/**
* @event Event an event that is triggered after a record is deleted.
*/
const EVENT_AFTER_DELETE = 'afterDelete';
/**
* @event Event an event that is triggered after a record is refreshed.
* @since 2.0.8
*/
const EVENT_AFTER_REFRESH = 'afterRefresh';
/**
* @var array attribute values indexed by attribute names
*/
private $_attributes = [];
/**
* @var array|null old attribute values indexed by attribute names.
* This is `null` if the record [[isNewRecord|is new]].
*/
private $_oldAttributes;
/**
* @var array related models indexed by the relation names
*/
private $_related = [];
/**
* @var array relation names indexed by their link attributes
*/
private $_relationsDependencies = [];
/**
* {@inheritdoc}
* @return static|null ActiveRecord instance matching the condition, or `null` if nothing matches.
*/
public static function findOne($condition)
{
return static::findByCondition($condition)->one();
}
/**
* {@inheritdoc}
* @return static[] an array of ActiveRecord instances, or an empty array if nothing matches.
*/
public static function findAll($condition)
{
return static::findByCondition($condition)->all();
}
/**
* Finds ActiveRecord instance(s) by the given condition.
* This method is internally called by [[findOne()]] and [[findAll()]].
* @param mixed $condition please refer to [[findOne()]] for the explanation of this parameter
* @return ActiveQueryInterface the newly created [[ActiveQueryInterface|ActiveQuery]] instance.
* @throws InvalidConfigException if there is no primary key defined
* @internal
*/
protected static function findByCondition($condition)
{
$query = static::find();
if (!ArrayHelper::isAssociative($condition) && !$condition instanceof ExpressionInterface) {
// query by primary key
$primaryKey = static::primaryKey();
if (isset($primaryKey[0])) {
// if condition is scalar, search for a single primary key, if it is array, search for multiple primary key values
$condition = [$primaryKey[0] => is_array($condition) ? array_values($condition) : $condition];
} else {
throw new InvalidConfigException('"' . get_called_class() . '" must have a primary key.');
}
}
return $query->andWhere($condition);
}
/**
* 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:
*
* ```php
* Customer::updateAll(['status' => 1], 'status = 2');
* ```
*
* @param array $attributes attribute values (name-value pairs) to be saved into the table
* @param string|array $condition the conditions that will be put in the WHERE part of the UPDATE SQL.
* Please refer to [[Query::where()]] on how to specify this parameter.
* @return int the number of rows updated
* @throws NotSupportedException if not overridden
*/
public static function updateAll($attributes, $condition = '')
{
throw new NotSupportedException(__METHOD__ . ' is not supported.');
}
/**
* Updates the whole table using the provided counter changes and conditions.
*
* For example, to increment all customers' age by 1,
*
* ```php
* 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 $condition the conditions that will be put in the WHERE part of the UPDATE SQL.
* Please refer to [[Query::where()]] on how to specify this parameter.
* @return int the number of rows updated
* @throws NotSupportedException if not overrided
*/
public static function updateAllCounters($counters, $condition = '')
{
throw new NotSupportedException(__METHOD__ . ' is not supported.');
}
/**
* 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:
*
* ```php
* Customer::deleteAll('status = 3');
* ```
*
* @param string|array|null $condition the conditions that will be put in the WHERE part of the DELETE SQL.
* Please refer to [[Query::where()]] on how to specify this parameter.
* @return int the number of rows deleted
* @throws NotSupportedException if not overridden.
*/
public static function deleteAll($condition = null)
{
throw new NotSupportedException(__METHOD__ . ' is not supported.');
}
/**
* Returns the name of the column that stores the lock version for implementing optimistic locking.
*
* Optimistic locking allows multiple users to access the same record for edits and avoids
* potential conflicts. In case when a user attempts to save the record upon some staled data
* (because another user has modified the data), a [[StaleObjectException]] exception will be thrown,
* and the update or deletion is skipped.
*
* Optimistic locking is only supported by [[update()]] and [[delete()]].
*
* To use Optimistic locking:
*
* 1. Create a column to store the version number of each row. The column type should be `BIGINT DEFAULT 0`.
* Override this method to return the name of this column.
* 2. Ensure the version value is submitted and loaded to your model before any update or delete.
* Or add [[\yii\behaviors\OptimisticLockBehavior|OptimisticLockBehavior]] to your model
* class in order to automate the process.
* 3. In the Web form that collects the user input, add a hidden field that stores
* the lock version of the record being updated.
* 4. In the controller action that does the data updating, try to catch the [[StaleObjectException]]
* and implement necessary business logic (e.g. merging the changes, prompting stated data)
* to resolve the conflict.
*
* @return string|null the column name that stores the lock version of a table row.
* If `null` is returned (default implemented), optimistic locking will not be supported.
*/
public function optimisticLock()
{
return null;
}
/**
* {@inheritdoc}
*/
public function canGetProperty($name, $checkVars = true, $checkBehaviors = true)
{
if (parent::canGetProperty($name, $checkVars, $checkBehaviors)) {
return true;
}
try {
return $this->hasAttribute($name);
} catch (\Exception $e) {
// `hasAttribute()` may fail on base/abstract classes in case automatic attribute list fetching used
return false;
}
}
/**
* {@inheritdoc}
*/
public function canSetProperty($name, $checkVars = true, $checkBehaviors = true)
{
if (parent::canSetProperty($name, $checkVars, $checkBehaviors)) {
return true;
}
try {
return $this->hasAttribute($name);
} catch (\Exception $e) {
// `hasAttribute()` may fail on base/abstract classes in case automatic attribute list fetching used
return false;
}
}
/**
* PHP getter magic method.
* This method is overridden so that attributes and related objects can be accessed like properties.
*
* @param string $name property name
* @throws InvalidArgumentException if relation name is wrong
* @return mixed property value
* @see getAttribute()
*/
public function __get($name)
{
if (array_key_exists($name, $this->_attributes)) {
return $this->_attributes[$name];
}
if ($this->hasAttribute($name)) {
return null;
}
if (array_key_exists($name, $this->_related)) {
return $this->_related[$name];
}
$value = parent::__get($name);
if ($value instanceof ActiveQueryInterface) {
$this->setRelationDependencies($name, $value);
return $this->_related[$name] = $value->findFor($name, $this);
}
return $value;
}
/**
* PHP setter magic method.
* This method is overridden so that AR attributes can be accessed like properties.
* @param string $name property name
* @param mixed $value property value
*/
public function __set($name, $value)
{
if ($this->hasAttribute($name)) {
if (
!empty($this->_relationsDependencies[$name])
&& (!array_key_exists($name, $this->_attributes) || $this->_attributes[$name] !== $value)
) {
$this->resetDependentRelations($name);
}
$this->_attributes[$name] = $value;
} else {
parent::__set($name, $value);
}
}
/**
* Checks if a property value is null.
* This method overrides the parent implementation by checking if the named attribute is `null` or not.
* @param string $name the property name or the event name
* @return bool whether the property value is null
*/
public function __isset($name)
{
try {
return $this->__get($name) !== null;
} catch (\Exception $t) {
return false;
} catch (\Throwable $e) {
return false;
}
}
/**
* Sets a component property to be null.
* This method overrides the parent implementation by clearing
* the specified attribute value.
* @param string $name the property name or the event name
*/
public function __unset($name)
{
if ($this->hasAttribute($name)) {
unset($this->_attributes[$name]);
if (!empty($this->_relationsDependencies[$name])) {
$this->resetDependentRelations($name);
}
} elseif (array_key_exists($name, $this->_related)) {
unset($this->_related[$name]);
} elseif ($this->getRelation($name, false) === null) {
parent::__unset($name);
}
}
/**
* Declares a `has-one` relation.
* The declaration is returned in terms of a relational [[ActiveQuery]] instance
* through which the related record can be queried and retrieved back.
*
* A `has-one` relation means that there is at most one related record matching
* the criteria set by this relation, e.g., a customer has one country.
*
* For example, to declare the `country` relation for `Customer` class, we can write
* the following code in the `Customer` class:
*
* ```php
* public function getCountry()
* {
* return $this->hasOne(Country::class, ['id' => 'country_id']);
* }
* ```
*
* Note that in the above, the 'id' key in the `$link` parameter refers to an attribute name
* in the related class `Country`, while the 'country_id' value refers to an attribute name
* in the current AR class.
*
* Call methods declared in [[ActiveQuery]] to further customize the relation.
*
* @param string $class the class name of the related record
* @param array $link the primary-foreign key constraint. The keys of the array refer to
* the attributes of the record associated with the `$class` model, while the values of the
* array refer to the corresponding attributes in **this** AR class.
* @return ActiveQueryInterface the relational query object.
*/
public function hasOne($class, $link)
{
return $this->createRelationQuery($class, $link, false);
}
/**
* Declares a `has-many` relation.
* The declaration is returned in terms of a relational [[ActiveQuery]] instance
* through which the related record can be queried and retrieved back.
*
* A `has-many` relation means that there are multiple related records matching
* the criteria set by this relation, e.g., a customer has many orders.
*
* For example, to declare the `orders` relation for `Customer` class, we can write
* the following code in the `Customer` class:
*
* ```php
* public function getOrders()
* {
* return $this->hasMany(Order::class, ['customer_id' => 'id']);
* }
* ```
*
* Note that in the above, the 'customer_id' key in the `$link` parameter refers to
* an attribute name in the related class `Order`, while the 'id' value refers to
* an attribute name in the current AR class.
*
* Call methods declared in [[ActiveQuery]] to further customize the relation.
*
* @param string $class the class name of the related record
* @param array $link the primary-foreign key constraint. The keys of the array refer to
* the attributes of the record associated with the `$class` model, while the values of the
* array refer to the corresponding attributes in **this** AR class.
* @return ActiveQueryInterface the relational query object.
*/
public function hasMany($class, $link)
{
return $this->createRelationQuery($class, $link, true);
}
/**
* Creates a query instance for `has-one` or `has-many` relation.
* @param string $class the class name of the related record.
* @param array $link the primary-foreign key constraint.
* @param bool $multiple whether this query represents a relation to more than one record.
* @return ActiveQueryInterface the relational query object.
* @since 2.0.12
* @see hasOne()
* @see hasMany()
*/
protected function createRelationQuery($class, $link, $multiple)
{
/* @var $class ActiveRecordInterface */
/* @var $query ActiveQuery */
$query = $class::find();
$query->primaryModel = $this;
$query->link = $link;
$query->multiple = $multiple;
return $query;
}
/**
* Populates the named relation with the related records.
* Note that this method does not check if the relation exists or not.
* @param string $name the relation name, e.g. `orders` for a relation defined via `getOrders()` method (case-sensitive).
* @param ActiveRecordInterface|array|null $records the related records to be populated into the relation.
* @see getRelation()
*/
public function populateRelation($name, $records)
{
foreach ($this->_relationsDependencies as &$relationNames) {
unset($relationNames[$name]);
}
$this->_related[$name] = $records;
}
/**
* Check whether the named relation has been populated with records.
* @param string $name the relation name, e.g. `orders` for a relation defined via `getOrders()` method (case-sensitive).
* @return bool whether relation has been populated with records.
* @see getRelation()
*/
public function isRelationPopulated($name)
{
return array_key_exists($name, $this->_related);
}
/**
* Returns all populated related records.
* @return array an array of related records indexed by relation names.
* @see getRelation()
*/
public function getRelatedRecords()
{
return $this->_related;
}
/**
* Returns a value indicating whether the model has an attribute with the specified name.
* @param string $name the name of the attribute
* @return bool whether the model has an attribute with the specified name.
*/
public function hasAttribute($name)
{
return isset($this->_attributes[$name]) || in_array($name, $this->attributes(), true);
}
/**
* Returns the named attribute value.
* If this record is the result of a query and the attribute is not loaded,
* `null` will be returned.
* @param string $name the attribute name
* @return mixed the attribute value. `null` if the attribute is not set or does not exist.
* @see hasAttribute()
*/
public function getAttribute($name)
{
return isset($this->_attributes[$name]) ? $this->_attributes[$name] : null;
}
/**
* Sets the named attribute value.
* @param string $name the attribute name
* @param mixed $value the attribute value.
* @throws InvalidArgumentException if the named attribute does not exist.
* @see hasAttribute()
*/
public function setAttribute($name, $value)
{
if ($this->hasAttribute($name)) {
if (
!empty($this->_relationsDependencies[$name])
&& (!array_key_exists($name, $this->_attributes) || $this->_attributes[$name] !== $value)
) {
$this->resetDependentRelations($name);
}
$this->_attributes[$name] = $value;
} else {
throw new InvalidArgumentException(get_class($this) . ' has no attribute named "' . $name . '".');
}
}
/**
* Returns the old attribute values.
* @return array the old attribute values (name-value pairs)
*/
public function getOldAttributes()
{
return $this->_oldAttributes === null ? [] : $this->_oldAttributes;
}
/**
* Sets the old attribute values.
* All existing old attribute values will be discarded.
* @param array|null $values old attribute values to be set.
* If set to `null` this record is considered to be [[isNewRecord|new]].
*/
public function setOldAttributes($values)
{
$this->_oldAttributes = $values;
}
/**
* Returns the old value of the named attribute.
* If this record is the result of a query and the attribute is not loaded,
* `null` will be returned.
* @param string $name the attribute name
* @return mixed the old attribute value. `null` if the attribute is not loaded before
* or does not exist.
* @see hasAttribute()
*/
public function getOldAttribute($name)
{
return isset($this->_oldAttributes[$name]) ? $this->_oldAttributes[$name] : null;
}
/**
* Sets the old value of the named attribute.
* @param string $name the attribute name
* @param mixed $value the old attribute value.
* @throws InvalidArgumentException if the named attribute does not exist.
* @see hasAttribute()
*/
public function setOldAttribute($name, $value)
{
if ($this->canSetOldAttribute($name)) {
$this->_oldAttributes[$name] = $value;
} else {
throw new InvalidArgumentException(get_class($this) . ' has no attribute named "' . $name . '".');
}
}
/**
* Returns if the old named attribute can be set.
* @param string $name the attribute name
* @return bool whether the old attribute can be set
* @see setOldAttribute()
*/
public function canSetOldAttribute($name)
{
return (isset($this->_oldAttributes[$name]) || $this->hasAttribute($name));
}
/**
* Marks an attribute dirty.
* This method may be called to force updating a record when calling [[update()]],
* even if there is no change being made to the record.
* @param string $name the attribute name
*/
public function markAttributeDirty($name)
{
unset($this->_oldAttributes[$name]);
}
/**
* Returns a value indicating whether the named attribute has been changed.
* @param string $name the name of the attribute.
* @param bool $identical whether the comparison of new and old value is made for
* identical values using `===`, defaults to `true`. Otherwise `==` is used for comparison.
* This parameter is available since version 2.0.4.
* @return bool whether the attribute has been changed
*/
public function isAttributeChanged($name, $identical = true)
{
if (isset($this->_attributes[$name], $this->_oldAttributes[$name])) {
if ($identical) {
return $this->_attributes[$name] !== $this->_oldAttributes[$name];
}
return $this->_attributes[$name] != $this->_oldAttributes[$name];
}
return isset($this->_attributes[$name]) || isset($this->_oldAttributes[$name]);
}
/**
* Returns the attribute values that have been modified since they are loaded or saved most recently.
*
* The comparison of new and old values is made for identical values using `===`.
*
* @param string[]|null $names the names of the attributes whose values may be returned if they are
* changed recently. If null, [[attributes()]] will be used.
* @return array the changed attribute values (name-value pairs)
*/
public function getDirtyAttributes($names = null)
{
if ($names === null) {
$names = $this->attributes();
}
$names = array_flip($names);
$attributes = [];
if ($this->_oldAttributes === null) {
foreach ($this->_attributes as $name => $value) {
if (isset($names[$name])) {
$attributes[$name] = $value;
}
}
} else {
foreach ($this->_attributes as $name => $value) {
if (isset($names[$name]) && (!array_key_exists($name, $this->_oldAttributes) || $this->isValueDifferent($value, $this->_oldAttributes[$name]))) {
$attributes[$name] = $value;
}
}
}
return $attributes;
}
/**
* Saves the current record.
*
* This method will call [[insert()]] when [[isNewRecord]] is `true`, or [[update()]]
* when [[isNewRecord]] is `false`.
*
* For example, to save a customer record:
*
* ```php
* $customer = new Customer; // or $customer = Customer::findOne($id);
* $customer->name = $name;
* $customer->email = $email;
* $customer->save();
* ```
*
* @param bool $runValidation whether to perform validation (calling [[validate()]])
* before saving the record. Defaults to `true`. If the validation fails, the record
* will not be saved to the database and this method will return `false`.
* @param array|null $attributeNames list of attribute names that need to be saved. Defaults to null,
* meaning all attributes that are loaded from DB will be saved.
* @return bool whether the saving succeeded (i.e. no validation errors occurred).
* @throws Exception in case update or insert failed.
*/
public function save($runValidation = true, $attributeNames = null)
{
if ($this->getIsNewRecord()) {
return $this->insert($runValidation, $attributeNames);
}
return $this->update($runValidation, $attributeNames) !== false;
}
/**
* Saves the changes to this active record into the associated database table.
*
* This method performs the following steps in order:
*
* 1. call [[beforeValidate()]] when `$runValidation` is `true`. If [[beforeValidate()]]
* returns `false`, the rest of the steps will be skipped;
* 2. call [[afterValidate()]] when `$runValidation` is `true`. If validation
* failed, the rest of the steps will be skipped;
* 3. call [[beforeSave()]]. If [[beforeSave()]] returns `false`,
* the rest of the steps will be skipped;
* 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_AFTER_VALIDATE]], [[EVENT_BEFORE_UPDATE]], and [[EVENT_AFTER_UPDATE]]
* will be raised by the corresponding methods.
*
* Only the [[dirtyAttributes|changed attribute values]] will be saved into database.
*
* For example, to update a customer record:
*
* ```php
* $customer = Customer::findOne($id);
* $customer->name = $name;
* $customer->email = $email;
* $customer->update();
* ```
*
* Note that it is possible the update does not affect any row in the table.
* In this case, this method will return 0. For this reason, you should use the following
* code to check if update() is successful or not:
*
* ```php
* if ($customer->update() !== false) {
* // update successful
* } else {
* // update failed
* }
* ```
*
* @param bool $runValidation whether to perform validation (calling [[validate()]])
* before saving the record. Defaults to `true`. If the validation fails, the record
* will not be saved to the database and this method will return `false`.
* @param array|null $attributeNames list of attribute names that need to be saved. Defaults to null,
* meaning all attributes that are loaded from DB will be saved.
* @return int|false the number of rows affected, or `false` if validation fails
* or [[beforeSave()]] stops the updating process.
* @throws StaleObjectException if [[optimisticLock|optimistic locking]] is enabled and the data
* being updated is outdated.
* @throws Exception in case update failed.
*/
public function update($runValidation = true, $attributeNames = null)
{
if ($runValidation && !$this->validate($attributeNames)) {
return false;
}
return $this->updateInternal($attributeNames);
}
/**
* Updates the specified attributes.
*
* This method is a shortcut to [[update()]] when data validation is not needed
* and only a small set attributes need to be updated.
*
* You may specify the attributes to be updated as name list or name-value pairs.
* If the latter, the corresponding attribute values will be modified accordingly.
* The method will then save the specified attributes into database.
*
* Note that this method will **not** perform data validation and will **not** trigger events.
*
* @param array $attributes the attributes (names or name-value pairs) to be updated
* @return int the number of rows affected.
*/
public function updateAttributes($attributes)
{
$attrs = [];
foreach ($attributes as $name => $value) {
if (is_int($name)) {
$attrs[] = $value;
} else {
$this->$name = $value;
$attrs[] = $name;
}
}
$values = $this->getDirtyAttributes($attrs);
if (empty($values) || $this->getIsNewRecord()) {
return 0;
}
$rows = static::updateAll($values, $this->getOldPrimaryKey(true));
foreach ($values as $name => $value) {
$this->_oldAttributes[$name] = $this->_attributes[$name];
}
return $rows;
}
/**
* @see update()
* @param array|null $attributes attributes to update
* @return int|false the number of rows affected, or false if [[beforeSave()]] stops the updating process.
* @throws StaleObjectException
*/
protected function updateInternal($attributes = null)
{
if (!$this->beforeSave(false)) {
return false;
}
$values = $this->getDirtyAttributes($attributes);
if (empty($values)) {
$this->afterSave(false, $values);
return 0;
}
$condition = $this->getOldPrimaryKey(true);
$lock = $this->optimisticLock();
if ($lock !== null) {
$values[$lock] = $this->$lock + 1;
$condition[$lock] = $this->$lock;
}
// We do not check the return value of updateAll() because it's possible
// that the UPDATE statement doesn't change anything and thus returns 0.
$rows = static::updateAll($values, $condition);
if ($lock !== null && !$rows) {
throw new StaleObjectException('The object being updated is outdated.');
}
if (isset($values[$lock])) {
$this->$lock = $values[$lock];
}
$changedAttributes = [];
foreach ($values as $name => $value) {
$changedAttributes[$name] = isset($this->_oldAttributes[$name]) ? $this->_oldAttributes[$name] : null;
$this->_oldAttributes[$name] = $value;
}
$this->afterSave(false, $changedAttributes);
return $rows;
}
/**
* Updates one or several counter columns for the current AR object.
* Note that this method differs from [[updateAllCounters()]] in that it only
* saves counters for the current AR object.
*
* An example usage is as follows:
*
* ```php
* $post = Post::findOne($id);
* $post->updateCounters(['view_count' => 1]);
* ```
*
* @param array $counters the counters to be updated (attribute name => increment value)
* Use negative values if you want to decrement the counters.
* @return bool whether the saving is successful
* @see updateAllCounters()
*/
public function updateCounters($counters)
{
if (static::updateAllCounters($counters, $this->getOldPrimaryKey(true)) > 0) {
foreach ($counters as $name => $value) {
if (!isset($this->_attributes[$name])) {
$this->_attributes[$name] = $value;
} else {
$this->_attributes[$name] += $value;
}
$this->_oldAttributes[$name] = $this->_attributes[$name];
}
return true;
}
return false;
}
/**
* 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 int|false 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()
{
$result = false;
if ($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;
}
$result = static::deleteAll($condition);
if ($lock !== null && !$result) {
throw new StaleObjectException('The object being deleted is outdated.');
}
$this->_oldAttributes = null;
$this->afterDelete();
}
return $result;
}
/**
* Returns a value indicating whether the current record is new.
* @return bool whether the record is new and should be inserted when calling [[save()]].
*/
public function getIsNewRecord()
{
return $this->_oldAttributes === null;
}
/**
* Sets the value indicating whether the record is new.
* @param bool $value whether the record is new and should be inserted when calling [[save()]].
* @see getIsNewRecord()
*/
public function setIsNewRecord($value)
{
$this->_oldAttributes = $value ? null : $this->_attributes;
}
/**
* Initializes the object.
* This method is called at the end of the constructor.
* The default implementation will trigger an [[EVENT_INIT]] event.
*/
public function init()
{
parent::init();
$this->trigger(self::EVENT_INIT);
}
/**
* This method is called when the AR object is created and populated with the query result.
* The default implementation will trigger an [[EVENT_AFTER_FIND]] event.
* When overriding this method, make sure you call the parent implementation to ensure the
* event is triggered.
*/
public function afterFind()
{
$this->trigger(self::EVENT_AFTER_FIND);
}
/**
* This method is called at the beginning of inserting or updating a record.
*
* The default implementation will trigger an [[EVENT_BEFORE_INSERT]] event when `$insert` is `true`,
* or an [[EVENT_BEFORE_UPDATE]] event if `$insert` is `false`.
* When overriding this method, make sure you call the parent implementation like the following:
*
* ```php
* public function beforeSave($insert)
* {
* if (!parent::beforeSave($insert)) {
* return false;
* }
*
* // ...custom code here...
* return true;
* }
* ```
*
* @param bool $insert whether this method called while inserting a record.
* If `false`, it means the method is called while updating a record.
* @return bool whether the insertion or updating should continue.
* If `false`, the insertion or updating will be cancelled.
*/
public function beforeSave($insert)
{
$event = new ModelEvent();
$this->trigger($insert ? self::EVENT_BEFORE_INSERT : self::EVENT_BEFORE_UPDATE, $event);
return $event->isValid;
}
/**
* This method is called at the end of inserting or updating a record.
* The default implementation will trigger an [[EVENT_AFTER_INSERT]] event when `$insert` is `true`,
* or an [[EVENT_AFTER_UPDATE]] event if `$insert` is `false`. The event class used is [[AfterSaveEvent]].
* When overriding this method, make sure you call the parent implementation so that
* the event is triggered.
* @param bool $insert whether this method called while inserting a record.
* If `false`, it means the method is called while updating a record.
* @param array $changedAttributes The old values of attributes that had changed and were saved.
* You can use this parameter to take action based on the changes made for example send an email
* when the password had changed or implement audit trail that tracks all the changes.
* `$changedAttributes` gives you the old attribute values while the active record (`$this`) has