<?php
/**
* ActiveRecord class file.
*
* @author Qiang Xue < qiang.xue @ gmail . com >
* @link http://www.yiiframework.com/
* @copyright Copyright © 2008-2012 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db\ar;
use yii\base\Model;
use yii\base\Event;
use yii\base\ModelEvent;
use yii\db\Exception;
use yii\db\dao\Connection;
use yii\db\dao\TableSchema;
use yii\db\dao\Query;
use yii\db\dao\Expression;
use yii\util\StringHelper;
/**
* ActiveRecord is the base class for classes representing relational data.
*
* @author Qiang Xue < qiang.xue @ gmail . com >
* @since 2.0
*
* @property array $attributes attribute values indexed by attribute names
*
* ActiveRecord provides a set of events for further customization:
*
* - `beforeInsert`. Raised before the record is saved.
* By setting [[\yii\base\ModelEvent::isValid]] to be false, the normal [[save()]] will be stopped.
* - `afterInsert`. Raised after the record is saved.
* - `beforeUpdate`. Raised before the record is saved.
* By setting [[\yii\base\ModelEvent::isValid]] to be false, the normal [[save()]] will be stopped.
* - `afterUpdate`. Raised after the record is saved.
* - `beforeDelete`. Raised before the record is deleted.
* By setting [[\yii\base\ModelEvent::isValid]] to be false, the normal [[delete()]] process will be stopped.
* - `afterDelete`. Raised after the record is deleted.
*
*/
abstract class ActiveRecord extends Model
{
/**
* @var array attribute values indexed by attribute names
*/
private $_attributes = array();
/**
* @var array old attribute values indexed by attribute names.
*/
private $_oldAttributes;
/**
* @var array related records indexed by relation names.
*/
private $_related;
/**
* Returns the metadata for this AR class.
* @param boolean $refresh whether to rebuild the metadata.
* @return ActiveMetaData the meta for this AR class.
*/
public static function getMetaData($refresh = false)
{
return ActiveMetaData::getInstance(get_called_class(), $refresh);
}
/**
* Returns the database connection used by this AR class.
* By default, the "db" application component is used as the database connection.
* You may override this method if you want to use a different database connection.
* @return Connection the database connection used by this AR class.
*/
public static function getDbConnection()
{
return \Yii::$application->getDb();
}
/**
* Creates an [[ActiveQuery]] instance for query purpose.
*
* Because [[ActiveQuery]] implements a set of query building methods,
* additional query conditions can be specified by calling the methods of [[ActiveQuery]].
*
* Below are some usage examples:
*
* ~~~
* // find all customers
* $customers = Customer::find()->all();
* // find a single customer whose primary key value is 10
* $customer = Customer::find(10);
* // the above is equivalent to:
* Customer::find()->where(array('id' => 10))->one();
* // find all active customers and order them by their age:
* $customers = Customer::find()
* ->where(array('status' => 1))
* ->order('age')
* ->all();
* // or alternatively:
* $customers = Customer::find(array(
* 'where' => array('status' => 1),
* 'order' => 'age',
* ))->all();
* ~~~
*
* @param mixed $q the query parameter. This can be one of the followings:
*
* - a scalar value (integer or string): query by a single primary key value.
* - an array of name-value pairs: it will be used to configure the [[ActiveQuery]] object.
*
* @return ActiveQuery|ActiveRecord|null the [[ActiveQuery]] instance for query purpose, or
* the ActiveRecord object when a scalar is passed to this method which is considered to be a
* primary key value (null will be returned if no record is found in this case.)
*/
public static function find($q = null)
{
$query = static::createActiveQuery();
if (is_array($q)) {
foreach ($q as $name => $value) {
$query->$name = $value;
}
} elseif ($q !== null) {
// query by primary key
$primaryKey = static::getMetaData()->table->primaryKey;
return $query->where(array($primaryKey[0] => $q))->one();
}
return $query;
}
/**
* Creates an [[ActiveQuery]] instance and query by a given SQL statement.
* Note that because the SQL statement is already specified, calling further
* query methods (such as `where()`, `order()`) on [[ActiveQuery]] will have no effect.
* Methods such as `with()`, `asArray()` can still be called though.
* @param string $sql the SQL statement to be executed
* @param array $params parameters to be bound to the SQL statement during execution.
* @return ActiveQuery the [[ActiveQuery]] instance
*/
public static function findBySql($sql, $params = array())
{
$query = static::createActiveQuery();
$query->sql = $sql;
return $query->params($params);
}
/**
* Performs a COUNT query for this AR class.
*
* Below are some usage examples:
*
* ~~~
* // count the total number of customers
* echo Customer::count()->value();
* // count the number of active customers:
* echo Customer::count(array(
* 'where' => array('status' => 1),
* ))->value();
* // equivalent usage:
* echo Customer::count()
* ->where(array('status' => 1))
* ->value();
* // customize the count option
* echo Customer::count('COUNT(DISTINCT age)')->value();
* ~~~
*
* @param array $q the query configuration. This should be an array of name-value pairs.
* It will be used to configure the [[ActiveQuery]] object for query purpose.
*
* @return integer the counting result
*/
public static function count($q = null)
{
$query = static::createActiveQuery();
if (is_array($q)) {
foreach ($q as $name => $value) {
$query->$name = $value;
}
}
if ($query->select === null) {
$query->select = array('COUNT(*)');
}
return $query->value();
}
/**
* Updates the whole table using the provided attribute values and conditions.
* @param array $attributes attribute values to be saved into the table
* @param string|array $condition the conditions that will be put in the WHERE part.
* 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 = array())
{
$query = new Query;
$query->update(static::tableName(), $attributes, $condition, $params);
return $query->createCommand(static::getDbConnection())->execute();
}
/**
* Updates the whole table using the provided counter values and conditions.
* @param array $counters the counters to be updated (attribute name => increment value).
* @param string|array $condition the conditions that will be put in the WHERE part.
* Please refer to [[Query::where()]] on how to specify this parameter.
* @param array $params the parameters (name=>value) to be bound to the query.
* @return integer the number of rows updated
*/
public static function updateAllCounters($counters, $condition = '', $params = array())
{
$db = static::getDbConnection();
foreach ($counters as $name => $value) {
$value = (int)$value;
$quotedName = $db->quoteColumnName($name, true);
$counters[$name] = new Expression($value >= 0 ? "$quotedName+$value" : "$quotedName$value");
}
$query = new Query;
$query->update(static::tableName(), $counters, $condition, $params);
return $query->createCommand($db)->execute();
}
/**
* Deletes rows in the table using the provided conditions.
* @param string|array $condition the conditions that will be put in the WHERE part.
* Please refer to [[Query::where()]] on how to specify this parameter.
* @param array $params the parameters (name=>value) to be bound to the query.
* @return integer the number of rows updated
*/
public static function deleteAll($condition = '', $params = array())
{
$query = new Query;
$query->delete(static::tableName(), $condition, $params);
return $query->createCommand(static::getDbConnection())->execute();
}
/**
* Creates a [[ActiveQuery]] instance.
* This method is called by [[find()]] and [[findBySql()]] to start a SELECT query.
* @return ActiveQuery the newly created [[ActiveQuery]] instance.
*/
public static function createActiveQuery()
{
return new ActiveQuery(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 [[StringHelper::camel2id()]].
* For example, 'Customer' becomes 'customer', and 'OrderDetail' becomes 'order_detail'.
* You may override this method if the table is not named after this convention.
* @return string the table name
*/
public static function tableName()
{
return StringHelper::camel2id(basename(get_called_class()), '_');
}
/**
* Declares the primary key name for this AR class.
* This method is meant to be overridden in case when the table has no primary key defined
* (for some legacy database). If the table already has a primary key,
* you do not need to override this method. The default implementation simply returns null,
* meaning using the primary key defined in the database table.
* @return string|array the primary key of the associated database table.
* If the key is a single column, it should return the column name;
* If the key is a composite one consisting of several columns, it should
* return the array of the key column names.
*/
public static function primaryKey()
{
}
/**
* Declares the relations for this AR class.
*
* Child classes may override this method to specify their relations.
*
* The following code shows how to declare relations for a `Programmer` AR class:
*
* ~~~
* return array(
* 'manager:Manager' => '@.id = ?.manager_id',
* 'assignments:Assignment[]' => array(
* 'on' => '@.owner_id = ?.id AND @.status = 1',
* 'order' => '@.create_time DESC',
* ),
* 'projects:Project[]' => array(
* 'via' => 'assignments',
* 'on' => '@.id = ?.project_id',
* ),
* );
* ~~~
*
* This method should be overridden to declare related objects.
*
* There are four types of relations that may exist between two active record objects:
* < ul >
* < li > BELONGS_TO: e.g. a member belongs to a team;< / li >
* < li > HAS_ONE: e.g. a member has at most one profile;< / li >
* < li > HAS_MANY: e.g. a team has many members;< / li >
* < li > MANY_MANY: e.g. a member has many skills and a skill belongs to a member.< / li >
* < / ul >
*
* Besides the above relation types, a special relation called STAT is also supported
* that can be used to perform statistical query (or aggregational query).
* It retrieves the aggregational information about the related objects, such as the number
* of comments for each post, the average rating for each product, etc.
*
* Each kind of related objects is defined in this method as an array with the following elements:
* < pre >
* 'varName'=>array('relationType', 'className', 'foreign_key', ...additional options)
* < / pre >
* where 'varName' refers to the name of the variable/property that the related object(s) can
* be accessed through; 'relationType' refers to the type of the relation, which can be one of the
* following four constants: self::BELONGS_TO, self::HAS_ONE, self::HAS_MANY and self::MANY_MANY;
* 'className' refers to the name of the active record class that the related object(s) is of;
* and 'foreign_key' states the foreign key that relates the two kinds of active record.
* Note, for composite foreign keys, they must be listed together, separated by commas;
* and for foreign keys used in MANY_MANY relation, the joining table must be declared as well
* (e.g. 'join_table(fk1, fk2)').
*
* Additional options may be specified as name-value pairs in the rest array elements:
* < ul >
* < li > 'select': string|array, a list of columns to be selected. Defaults to '*', meaning all columns.
* Column names should be disambiguated if they appear in an expression (e.g. COUNT(relationName.name) AS name_count).< / li >
* < li > 'condition': string, the WHERE clause. Defaults to empty. Note, column references need to
* be disambiguated with prefix 'relationName.' (e.g. relationName.age> 20)< / li >
* < li > 'order': string, the ORDER BY clause. Defaults to empty. Note, column references need to
* be disambiguated with prefix 'relationName.' (e.g. relationName.age DESC)< / li >
* < li > 'with': string|array, a list of child related objects that should be loaded together with this object.
* Note, this is only honored by lazy loading, not eager loading.< / li >
* < li > 'joinType': type of join. Defaults to 'LEFT OUTER JOIN'.< / li >
* < li > 'alias': the alias for the table associated with this relationship.
* This option has been available since version 1.0.1. It defaults to null,
* meaning the table alias is the same as the relation name.< / li >
* < li > 'params': the parameters to be bound to the generated SQL statement.
* This should be given as an array of name-value pairs. This option has been
* available since version 1.0.3.< / li >
* < li > 'on': the ON clause. The condition specified here will be appended
* to the joining condition using the AND operator. This option has been
* available since version 1.0.2.< / li >
* < li > 'index': the name of the column whose values should be used as keys
* of the array that stores related objects. This option is only available to
* HAS_MANY and MANY_MANY relations. This option has been available since version 1.0.7.< / li >
* < li > 'scopes': scopes to apply. In case of a single scope can be used like 'scopes'=>'scopeName',
* in case of multiple scopes can be used like 'scopes'=>array('scopeName1','scopeName2').
* This option has been available since version 1.1.9.< / li >
* < / ul >
*
* The following options are available for certain relations when lazy loading:
* < ul >
* < li > 'group': string, the GROUP BY clause. Defaults to empty. Note, column references need to
* be disambiguated with prefix 'relationName.' (e.g. relationName.age). This option only applies to HAS_MANY and MANY_MANY relations.< / li >
* < li > 'having': string, the HAVING clause. Defaults to empty. Note, column references need to
* be disambiguated with prefix 'relationName.' (e.g. relationName.age). This option only applies to HAS_MANY and MANY_MANY relations.< / li >
* < li > 'limit': limit of the rows to be selected. This option does not apply to BELONGS_TO relation.< / li >
* < li > 'offset': offset of the rows to be selected. This option does not apply to BELONGS_TO relation.< / li >
* < li > 'through': name of the model's relation that will be used as a bridge when getting related data. Can be set only for HAS_ONE and HAS_MANY. This option has been available since version 1.1.7.< / li >
* < / ul >
*
* Below is an example declaring related objects for 'Post' active record class:
* < pre >
* return array(
* 'author'=>array(self::BELONGS_TO, 'User', 'author_id'),
* 'comments'=>array(self::HAS_MANY, 'Comment', 'post_id', 'with'=>'author', 'order'=>'create_time DESC'),
* 'tags'=>array(self::MANY_MANY, 'Tag', 'post_tag(post_id, tag_id)', 'order'=>'name'),
* );
* < / pre >
*
* @return array list of related object declarations. Defaults to empty array.
*/
public static function relations()
{
return array();
}
/**
* Returns the default named scope that should be implicitly applied to all queries for this model.
* Note, default scope only applies to SELECT queries. It is ignored for INSERT, UPDATE and DELETE queries.
* The default implementation simply returns an empty array. You may override this method
* if the model needs to be queried with some default criteria (e.g. only active records should be returned).
* @param BaseActiveQuery
* @return BaseActiveQuery the query criteria. This will be used as the parameter to the constructor
* of {@link CDbCriteria}.
*/
public static function defaultScope($query)
{
return $query;
}
/**
* Returns the declaration of named scopes.
* A named scope represents a query criteria that can be chained together with
* other named scopes and applied to a query. This method should be overridden
* by child classes to declare named scopes for the particular AR classes.
* For example, the following code declares two named scopes: 'recently' and
* 'published'.
* < pre >
* return array(
* 'published'=>array(
* 'condition'=>'status=1',
* ),
* 'recently'=>array(
* 'order'=>'create_time DESC',
* 'limit'=>5,
* ),
* );
* < / pre >
* If the above scopes are declared in a 'Post' model, we can perform the following
* queries:
* < pre >
* $posts=Post::model()->published()->findAll();
* $posts=Post::model()->published()->recently()->findAll();
* $posts=Post::model()->published()->with('comments')->findAll();
* < / pre >
* Note that the last query is a relational query.
*
* @return array the scope definition. The array keys are scope names; the array
* values are the corresponding scope definitions. Each scope definition is represented
* as an array whose keys must be properties of {@link CDbCriteria}.
*/
public static function scopes()
{
return array();
}
/**
* PHP getter magic method.
* This method is overridden so that attributes and related objects can be accessed like properties.
* @param string $name property name
* @return mixed property value
* @see getAttribute
*/
public function __get($name)
{
if (isset($this->_attributes[$name])) {
return $this->_attributes[$name];
}
$md = $this->getMetaData();
if (isset($md->table->columns[$name])) {
return null;
} elseif (isset($md->relations[$name])) {
if (isset($this->_related[$name]) || $this->_related !== null & & array_key_exists($name, $this->_related)) {
return $this->_related[$name];
} else {
return $this->_related[$name] = $this->findByRelation($md->relations[$name]);
}
}
return parent::__get($name);
}
/**
* 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)
{
$md = $this->getMetaData();
if (isset($md->table->columns[$name])) {
$this->_attributes[$name] = $value;
} elseif (isset($md->relations[$name])) {
$this->_related[$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 $name the property name or the event name
* @return boolean whether the property value is null
*/
public function __isset($name)
{
if (isset($this->_attributes[$name]) || isset($this->_related[$name])) {
return true;
}
$md = $this->getMetaData();
if (isset($md->table->columns[$name]) || isset($md->relations[$name])) {
return false;
} else {
return parent::__isset($name);
}
}
/**
* 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)
{
$md = $this->getMetaData();
if (isset($md->table->columns[$name])) {
unset($this->_attributes[$name]);
} elseif (isset($md->relations[$name])) {
unset($this->_related[$name]);
} else {
parent::__unset($name);
}
}
/**
* Calls the named method which is not a class method.
* Do not call this method. This is a PHP magic method that we override
* to implement the named scope feature.
* @param string $name the method name
* @param array $params method parameters
* @return mixed the method return value
*/
public function __call($name, $params)
{
$md = $this->getMetaData();
if (isset($md->relations[$name])) {
return $this->findByRelation($md->relations[$name], isset($params[0]) ? $params[0] : array());
}
return parent::__call($name, $params);
}
/**
* Initializes the internal storage for the relation.
* This method is internally used by [[ActiveQuery]] when populating relation data.
* @param ActiveRelation $relation the relation object
*/
public function initRelation($relation)
{
$this->_related[$relation->name] = $relation->hasMany ? array() : null;
}
/**
* @param ActiveRelation $relation
* @param ActiveRecord $record
*/
public function addRelatedRecord($relation, $record)
{
if ($relation->hasMany) {
if ($relation->index !== null) {
$this->_related[$relation->name][$record->{$relation->index}] = $record;
} else {
$this->_related[$relation->name][] = $record;
}
} else {
$this->_related[$relation->name] = $record;
}
}
/**
* Returns the related record(s).
* This method will return the related record(s) of the current record.
* If the relation is HAS_ONE or BELONGS_TO, it will return a single object
* or null if the object does not exist.
* If the relation is HAS_MANY or MANY_MANY, it will return an array of objects
* or an empty array.
* @param ActiveRelation|string $relation the relation object or the name of the relation
* @param array|\Closure $params additional parameters that customize the query conditions as specified in the relation declaration.
* @return mixed the related object(s).
* @throws Exception if the relation is not specified in [[relations()]].
*/
public function findByRelation($relation, $params = array())
{
if (is_string($relation)) {
$md = $this->getMetaData();
if (!isset($md->relations[$relation])) {
throw new Exception(get_class($this) . ' has no relation named "' . $relation . '".');
}
$relation = $md->relations[$relation];
}
$relation = clone $relation;
if ($params instanceof \Closure) {
$params($relation);
} else {
foreach ($params as $name => $value) {
$relation->$name = $value;
}
}
$finder = new ActiveFinder($this->getDbConnection());
return $finder->findWithRecord($this, $relation);
}
/**
* Returns the list of all attribute names of the model.
* This would return all column names of the table associated with this AR class.
* @return array list of attribute names.
*/
public function attributes()
{
return array_keys($this->getMetaData()->table->columns);
}
/**
* Returns a list of scenarios and the corresponding relevant attributes.
* Please refer to [[\yii\base\Model::scenarios()]] for more details.
* The implementation here simply returns an empty array. You may override
* this method to return the scenarios that you want to use with this AR class.
* @return array a list of scenarios and the corresponding relevant attributes.
*/
public function scenarios()
{
return array();
}
/**
* Returns the named attribute value.
* If this is a new record and the attribute is not set before,
* the default column value will be returned.
* If this record is the result of a query and the attribute is not loaded,
* null will be returned.
* You may also use $this->AttributeName to obtain the attribute value.
* @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.
* You may also use $this->AttributeName to set the attribute value.
* @param string $name the attribute name
* @param mixed $value the attribute value.
* @see hasAttribute
*/
public function setAttribute($name, $value)
{
$this->_attributes[$name] = $value;
}
/**
* Returns all column attribute values.
* Note, related objects are not returned.
* @param null|array $names names of attributes whose value needs to be returned.
* If this is true (default), then all attribute values will be returned, including
* those that are not loaded from DB (null will be returned for those attributes).
* If this is null, all attributes except those that are not loaded from DB will be returned.
* @return array attribute values indexed by attribute names.
*/
public function getAttributes($names = null)
{
if ($names === null) {
$names = $this->attributes();
}
$values = array();
foreach ($names as $name) {
$values[$name] = isset($this->_attributes[$name]) ? $this->_attributes[$name] : null;
}
return $values;
}
public function getChangedAttributes($names = null)
{
if ($names === null) {
$names = $this->attributes();
}
$names = array_flip($names);
$attributes = array();
if ($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) || $value !== $this->_oldAttributes[$name])) {
$attributes[$name] = $value;
}
}
}
return $attributes;
}
/**
* Saves the current record.
*
* The record is inserted as a row into the database table if its {@link isNewRecord}
* property is true (usually the case when the record is created using the 'new'
* operator). Otherwise, it will be used to update the corresponding row in the table
* (usually the case if the record is obtained using one of those 'find' methods.)
*
* Validation will be performed before saving the record. If the validation fails,
* the record will not be saved. You can call {@link getErrors()} to retrieve the
* validation errors.
*
* If the record is saved via insertion, its {@link isNewRecord} property will be
* set false, and its {@link scenario} property will be set to be 'update'.
* And if its primary key is auto-incremental and is not set before insertion,
* the primary key will be populated with the automatically generated key value.
*
* @param boolean $runValidation whether to perform validation before saving the record.
* If the validation fails, the record will not be saved to database.
* @param array $attributes list of attributes that need to be saved. Defaults to null,
* meaning all attributes that are loaded from DB will be saved.
* @return boolean whether the saving succeeds
*/
public function save($runValidation = true, $attributes = null)
{
if (!$runValidation || $this->validate($attributes)) {
return $this->getIsNewRecord() ? $this->insert($attributes) : $this->update($attributes);
}
return false;
}
/**
* Inserts a row into the table based on this active record attributes.
* If the table's primary key is auto-incremental and is null before insertion,
* it will be populated with the actual value after insertion.
* Note, validation is not performed in this method. You may call {@link validate} to perform the validation.
* After the record is inserted to DB successfully, its {@link isNewRecord} property will be set false,
* and its {@link scenario} property will be set to be 'update'.
* @param array $attributes list of attributes that need to be saved. Defaults to null,
* meaning all attributes that are loaded from DB will be saved.
* @return boolean whether the attributes are valid and the record is inserted successfully.
* @throws Exception if the record is not new
*/
public function insert($attributes = null)
{
if ($this->beforeInsert()) {
$query = new Query;
$values = $this->getChangedAttributes($attributes);
$db = $this->getDbConnection();
$command = $query->insert($this->tableName(), $values)->createCommand($db);
if ($command->execute()) {
$table = $this->getMetaData()->table;
if ($table->sequenceName !== null) {
foreach ($table->primaryKey as $name) {
if (!isset($this->_attributes[$name])) {
$this->_oldAttributes[$name] = $this->_attributes[$name] = $db->getLastInsertID($table->sequenceName);
break;
}
}
}
foreach ($values as $name => $value) {
$this->_oldAttributes[$name] = $value;
}
$this->afterInsert();
return true;
}
}
return false;
}
/**
* Updates the row represented by this active record.
* All loaded attributes will be saved to the database.
* Note, validation is not performed in this method. You may call {@link validate} to perform the validation.
* @param array $attributes list of attributes that need to be saved. Defaults to null,
* meaning all attributes that are loaded from DB will be saved.
* @return boolean whether the update is successful
* @throws Exception if the record is new
*/
public function update($attributes = null)
{
if ($this->getIsNewRecord()) {
throw new Exception('The active record cannot be updated because it is new.');
}
if ($this->beforeUpdate()) {
$values = $this->getChangedAttributes($attributes);
if ($values !== array()) {
$this->updateAll($values, $this->getOldPrimaryKey(true));
foreach ($values as $name => $value) {
$this->_oldAttributes[$name] = $this->_attributes[$name];
}
$this->afterUpdate();
}
return true;
} else {
return false;
}
}
/**
* Saves 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:
*
* ~~~
* $post = Post::find($id)->one();
* $post->updateCounters(array('view_count' => 1));
* ~~~
*
* Use negative values if you want to decrease the counters.
* @param array $counters the counters to be updated (attribute name => increment value)
* @return boolean whether the saving is successful
* @throws Exception if the record is new or any database error
* @see updateAllCounters()
*/
public function updateCounters($counters)
{
if ($this->getIsNewRecord()) {
throw new Exception('The active record cannot be updated because it is new.');
}
$this->updateAllCounters($counters, $this->getOldPrimaryKey(true));
foreach ($counters as $name => $value) {
$this->_attributes[$name] += $value;
$this->_oldAttributes[$name] = $this->_attributes[$name];
}
return true;
}
/**
* Deletes the row corresponding to this active record.
* @return boolean whether the deletion is successful.
* @throws Exception if the record is new or any database error
*/
public function delete()
{
if ($this->getIsNewRecord()) {
throw new Exception('The active record cannot be deleted because it is new.');
}
if ($this->beforeDelete()) {
$result = $this->deleteAll($this->getPrimaryKey(true)) > 0;
$this->_oldAttributes = null;
$this->afterDelete();
return $result;
} else {
return false;
}
}
/**
* Returns if the current record is new.
* @return boolean whether the record is new and should be inserted when calling {@link save}.
* This property is automatically set in constructor and {@link populateRecord}.
* Defaults to false, but it will be set to true if the instance is created using
* the new operator.
*/
public function getIsNewRecord()
{
return $this->_oldAttributes === null;
}
/**
* Sets if the record is new.
* @param boolean $value whether the record is new and should be inserted when calling {@link save}.
* @see getIsNewRecord
*/
public function setIsNewRecord($value)
{
$this->_oldAttributes = $value ? null : $this->_attributes;
}
/**
* This method is invoked before saving a record (after validation, if any).
* The default implementation raises the `beforeSave` event.
* You may override this method to do any preparation work for record saving.
* Use {@link isNewRecord} to determine whether the saving is
* for inserting or updating record.
* Make sure you call the parent implementation so that the event is raised properly.
* @return boolean whether the saving should be executed. Defaults to true.
*/
public function beforeInsert()
{
$event = new ModelEvent($this);
$this->trigger('beforeInsert', $event);
return $event->isValid;
}
/**
* This method is invoked after saving a record successfully.
* The default implementation raises the `afterSave` event.
* You may override this method to do postprocessing after record saving.
* Make sure you call the parent implementation so that the event is raised properly.
*/
public function afterInsert()
{
$this->trigger('afterInsert', new Event($this));
}
/**
* This method is invoked before saving a record (after validation, if any).
* The default implementation raises the `beforeSave` event.
* You may override this method to do any preparation work for record saving.
* Use {@link isNewRecord} to determine whether the saving is
* for inserting or updating record.
* Make sure you call the parent implementation so that the event is raised properly.
* @return boolean whether the saving should be executed. Defaults to true.
*/
public function beforeUpdate()
{
$event = new ModelEvent($this);
$this->trigger('beforeUpdate', $event);
return $event->isValid;
}
/**
* This method is invoked after saving a record successfully.
* The default implementation raises the `afterSave` event.
* You may override this method to do postprocessing after record saving.
* Make sure you call the parent implementation so that the event is raised properly.
*/
public function afterUpdate()
{
$this->trigger('afterUpdate', new Event($this));
}
/**
* This method is invoked before deleting a record.
* The default implementation raises the `beforeDelete` event.
* You may override this method to do any preparation work for record deletion.
* Make sure you call the parent implementation so that the event is raised properly.
* @return boolean whether the record should be deleted. Defaults to true.
*/
public function beforeDelete()
{
$event = new ModelEvent($this);
$this->trigger('beforeDelete', $event);
return $event->isValid;
}
/**
* This method is invoked after deleting a record.
* The default implementation raises the `afterDelete` event.
* You may override this method to do postprocessing after the record is deleted.
* Make sure you call the parent implementation so that the event is raised properly.
*/
public function afterDelete()
{
$this->trigger('afterDelete', new Event($this));
}
/**
* Repopulates this active record with the latest data.
* @param array $attributes
* @return boolean whether the row still exists in the database. If true, the latest data will be populated to this active record.
*/
public function refresh($attributes = null)
{
if ($this->getIsNewRecord()) {
return false;
}
$record = $this->find()->where($this->getPrimaryKey(true))->one();
if ($record === null) {
return false;
}
if ($attributes === null) {
foreach ($this->attributes() as $name) {
$this->_attributes[$name] = $record->_attributes[$name];
}
$this->_oldAttributes = $this->_attributes;
} else {
foreach ($attributes as $name) {
$this->_oldAttributes[$name] = $this->_attributes[$name] = $record->_attributes[$name];
}
}
return true;
}
/**
* Compares current active record with another one.
* The comparison is made by comparing table name and the primary key values of the two active records.
* @param ActiveRecord $record record to compare to
* @return boolean whether the two active records refer to the same row in the database table.
*/
public function equals($record)
{
return $this->tableName() === $record->tableName() & & $this->getPrimaryKey() === $record->getPrimaryKey();
}
/**
* Returns the primary key value.
* @param boolean $asArray whether to return the primary key value as an array. If true,
* the return value will be an array with column name as key and column value as value.
* @return mixed the primary key value. An array (column name=>column value) is returned if the primary key is composite.
* If primary key is not defined, null will be returned.
*/
public function getPrimaryKey($asArray = false)
{
$table = static::getMetaData()->table;
if (count($table->primaryKey) === 1 & & !$asArray) {
return isset($this->_attributes[$table->primaryKey[0]]) ? $this->_attributes[$table->primaryKey[0]] : null;
} else {
$values = array();
foreach ($table->primaryKey as $name) {
$values[$name] = isset($this->_attributes[$name]) ? $this->_attributes[$name] : null;
}
return $values;
}
}
/**
* Returns the old primary key value.
* This refers to the primary key value that is populated into the record
* after executing a find method (e.g. find(), findAll()).
* The value remains unchanged even if the primary key attribute is manually assigned with a different value.
* @param boolean $asArray whether to return the primary key value as an array. If true,
* the return value will be an array with column name as key and column value as value.
* If this is false (default), a scalar value will be returned for non-composite primary key.
* @return string|array the old primary key value. An array (column name=>column value) is returned if the primary key is composite.
* If primary key is not defined, null will be returned.
*/
public function getOldPrimaryKey($asArray = false)
{
$table = static::getMetaData()->table;
if (count($table->primaryKey) === 1 & & !$asArray) {
return isset($this->_oldAttributes[$table->primaryKey[0]]) ? $this->_oldAttributes[$table->primaryKey[0]] : null;
} else {
$values = array();
foreach ($table->primaryKey as $name) {
$values[$name] = isset($this->_oldAttributes[$name]) ? $this->_oldAttributes[$name] : null;
}
return $values;
}
}
/**
* Creates an active record with the given attributes.
* @param array $row attribute values (name => value)
* @return ActiveRecord the newly created active record.
*/
public static function create($row)
{
$record = static::instantiate($row);
$columns = static::getMetaData()->table->columns;
foreach ($row as $name => $value) {
if (isset($columns[$name])) {
$record->_attributes[$name] = $value;
} else {
$record->$name = $value;
}
}
$record->_oldAttributes = $record->_attributes;
return $record;
}
/**
* Creates an active record instance.
* This method is called by [[createRecord()]].
* You may override this method if the instance being created
* depends the attributes that are to be populated to the record.
* For example, by creating a record based on the value of a column,
* you may implement the so-called single-table inheritance mapping.
* @param array $row list of attribute values for the active records.
* @return ActiveRecord the active record
*/
public static function instantiate($row)
{
$class = get_called_class();
return new $class;
}
/**
* Returns whether there is an element at the specified offset.
* This method is required by the interface ArrayAccess.
* @param mixed $offset the offset to check on
* @return boolean
*/
public function offsetExists($offset)
{
return $this->__isset($offset);
}
}
