<?php
/**
* ActiveRecord class file.
*
* @author Carsten Brandt < mail @ cebe . cc >
* @link http://www.yiiframework.com/
* @copyright Copyright © 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db\redis;
use yii\base\NotSupportedException;
/**
* ActiveRecord is the base class for classes representing relational data in terms of objects.
*
* @include @yii/db/ActiveRecord.md
*
* @author Carsten Brandt < mail @ cebe . cc >
* @since 2.0
*/
abstract class ActiveRecord extends \yii\db\ActiveRecord
{
/**
* Returns the list of all attribute names of the model.
* The default implementation will return all column names of the table associated with this AR class.
* @return array list of attribute names.
*/
public function attributes() // TODO: refactor should be abstract in an ActiveRecord base class
{
return array();
}
/**
* Returns the database connection used by this AR class.
* By default, the "redis" application component is used as the database connection.
* You may override this method if you want to use a different database connection.
* @return Connection the database connection used by this AR class.
*/
public static function getDb()
{
return \Yii::$app->redis;
}
/**
* Creates an [[ActiveQuery]] instance for query purpose.
*
* @include @yii/db/ActiveRecord-find.md
*
* @param mixed $q the query parameter. This can be one of the followings:
*
* - a scalar value (integer or string): query by a single primary key value and return the
* corresponding record.
* - an array of name-value pairs: query by a set of column values and return a single record matching all of them.
* - null: return a new [[ActiveQuery]] object for further query purpose.
*
* @return ActiveQuery|ActiveRecord|null When `$q` is null, a new [[ActiveQuery]] instance
* is returned; when `$q` is a scalar or an array, an ActiveRecord object matching it will be
* returned (null will be returned if there is no matching).
* @see createQuery()
*/
public static function find($q = null)
{
// TODO
$query = static::createQuery();
if (is_array($q)) {
return $query->where($q)->one();
} elseif ($q !== null) {
// query by primary key
$primaryKey = static::primaryKey();
return $query->where(array($primaryKey[0] => $q))->one();
}
return $query;
}
/**
* Creates an [[ActiveQuery]] instance with a given SQL statement.
*
* Note that because the SQL statement is already specified, calling additional
* query modification methods (such as `where()`, `order()`) on the created [[ActiveQuery]]
* instance will have no effect. However, calling `with()`, `asArray()` or `indexBy()` is
* still fine.
*
* Below is an example:
*
* ~~~
* $customers = Customer::findBySql('SELECT * FROM tbl_customer')->all();
* ~~~
*
* @param string $sql the SQL statement to be executed
* @param array $params parameters to be bound to the SQL statement during execution.
* @return ActiveQuery the newly created [[ActiveQuery]] instance
*/
public static function findBySql($sql, $params = array())
{
throw new NotSupportedException('findBySql() is not supported by redis ActiveRecord');
}
/**
* Creates an [[ActiveQuery]] instance.
* This method is called by [[find()]], [[findBySql()]] and [[count()]] to start a SELECT query.
* You may override this method to return a customized query (e.g. `CustomerQuery` specified
* written for querying `Customer` purpose.)
* @return ActiveQuery the newly created [[ActiveQuery]] instance.
*/
public static function createQuery()
{
return new ActiveQuery(array(
'modelClass' => get_called_class(),
));
}
/**
* Returns the schema information of the DB table associated with this AR class.
* @return TableSchema the schema information of the DB table associated with this AR class.
*/
public static function getTableSchema()
{
throw new NotSupportedException('getTableSchema() is not supported by redis ActiveRecord as there is no schema in redis DB. Schema is defined by AR class itself');
}
/**
* Inserts a row into the associated database table using the attribute values of this record.
*
* This method performs the following steps in order:
*
* 1. call [[beforeValidate()]] when `$runValidation` is true. If validation
* fails, it will skip the rest of the steps;
* 2. call [[afterValidate()]] when `$runValidation` is true.
* 3. call [[beforeSave()]]. If the method returns false, it will skip the
* rest of the steps;
* 4. insert the record into database. If this fails, it will skip the rest of the steps;
* 5. call [[afterSave()]];
*
* In the above step 1, 2, 3 and 5, events [[EVENT_BEFORE_VALIDATE]],
* [[EVENT_BEFORE_INSERT]], [[EVENT_AFTER_INSERT]] and [[EVENT_AFTER_VALIDATE]]
* will be raised by the corresponding methods.
*
* Only the [[changedAttributes|changed attribute values]] will be inserted into database.
*
* If the table's primary key is auto-incremental and is null during insertion,
* it will be populated with the actual value after insertion.
*
* For example, to insert a customer record:
*
* ~~~
* $customer = new Customer;
* $customer->name = $name;
* $customer->email = $email;
* $customer->insert();
* ~~~
*
* @param boolean $runValidation whether to perform validation before saving the record.
* If the validation fails, the record will not be inserted into the database.
* @param array $attributes list of attributes that need to be saved. Defaults to null,
* meaning all attributes that are loaded from DB will be saved.
* @return boolean whether the attributes are valid and the record is inserted successfully.
*/
public function insert($runValidation = true, $attributes = null)
{
if ($runValidation & & !$this->validate($attributes)) {
return false;
}
if ($this->beforeSave(true)) {
$db = static::getDb();
$values = $this->getDirtyAttributes($attributes);
$pk = array();
if ($values === array()) {
foreach ($this->primaryKey() as $key) {
$pk[$key] = $values[$key] = $this->getAttribute($key);
if ($pk[$key] === null) {
$pk[$key] = $db->executeCommand('INCR', array(static::tableName() . ':s:', $key));
}
}
}
// save pk in a findall pool
$db->executeCommand('SADD', array(static::tableName(), $pk));
$key = static::tableName() . ':a:' . implode('-', $pk); // TODO escape PK glue
// save attributes
$args = array($key);
foreach($values as $attribute => $value) {
$args[] = $attribute;
$args[] = $value;
}
$db->executeCommand('HMSET', $args);
$this->setOldAttributes($values);
$this->afterSave(true);
return true;
}
return false;
}
/**
* Updates the whole table using the provided attribute values and conditions.
* For example, to change the status to be 1 for all customers whose status is 2:
*
* ~~~
* Customer::updateAll(array('status' => 1), 'status = 2');
* ~~~
*
* @param array $attributes attribute values (name-value pairs) to be saved into the table
* @param string|array $condition the conditions that will be put in the WHERE part of the UPDATE SQL.
* Please refer to [[Query::where()]] on how to specify this parameter.
* @param array $params the parameters (name=>value) to be bound to the query.
* @return integer the number of rows updated
*/
public static function updateAll($attributes, $condition = '', $params = array())
{
$db = static::getDb();
if ($condition==='') {
$condition = $db->executeCommand('SMEMBERS', array(static::tableName()));
}
if (empty($attributes)) {
return 0;
}
$n=0;
foreach($condition as $pk) {
$key = static::tableName() . ':a:' . (is_array($pk) ? implode('-', $pk) : $pk); // TODO escape PK glue
// save attributes
$args = array($key);
foreach($attributes as $attribute => $value) {
$args[] = $attribute;
$args[] = $value;
}
$db->executeCommand('HMSET', $args);
$n++;
}
return $n;
}
/**
* Updates the whole table using the provided counter changes and conditions.
* For example, to increment all customers' age by 1,
*
* ~~~
* Customer::updateAllCounters(array('age' => 1));
* ~~~
*
* @param array $counters the counters to be updated (attribute name => increment value).
* Use negative values if you want to decrement the counters.
* @param string|array $condition the conditions that will be put in the WHERE part of the UPDATE SQL.
* Please refer to [[Query::where()]] on how to specify this parameter.
* @param array $params the parameters (name=>value) to be bound to the query.
* Do not name the parameters as `:bp0`, `:bp1`, etc., because they are used internally by this method.
* @return integer the number of rows updated
*/
public static function updateAllCounters($counters, $condition = '', $params = array())
{
$db = static::getDb();
if ($condition==='') {
$condition = $db->executeCommand('SMEMBERS', array(static::tableName()));
}
$n=0;
foreach($condition as $pk) {
$key = static::tableName() . ':a:' . (is_array($pk) ? implode('-', $pk) : $pk); // TODO escape PK glue
foreach($counters as $attribute => $value) {
$db->executeCommand('HINCRBY', array($key, $attribute, $value));
}
$n++;
}
return $n;
}
/**
* Deletes rows in the table using the provided conditions.
* WARNING: If you do not specify any condition, this method will delete ALL rows in the table.
*
* For example, to delete all customers whose status is 3:
*
* ~~~
* Customer::deleteAll('status = 3');
* ~~~
*
* @param string|array $condition the conditions that will be put in the WHERE part of the DELETE SQL.
* Please refer to [[Query::where()]] on how to specify this parameter.
* @param array $params the parameters (name=>value) to be bound to the query.
* @return integer the number of rows deleted
*/
public static function deleteAll($condition = '', $params = array())
{
$db = static::getDb();
if ($condition==='') {
$condition = $db->executeCommand('SMEMBERS', array(static::tableName()));
}
if (empty($condition)) {
return 0;
}
$smembers = array();
$attributeKeys = array();
foreach($condition as $pk) {
if (is_array($pk)) {
$pk = implode('-', $pk);
}
$smembers[] = $pk; // TODO escape PK glue
$attributeKeys[] = static::tableName() . ':' . $pk . ':a'; // TODO escape PK glue
}
array_unshift($smembers, static::tableName());
$db->executeCommand('DEL', $attributeKeys);
return $db->executeCommand('SREM', $smembers);
}
/**
* Returns the primary key name(s) for this AR class.
* The default implementation will return the primary key(s) as declared
* in the DB table that is associated with this AR class.
*
* If the DB table does not declare any primary key, you should override
* this method to return the attributes that you want to use as primary keys
* for this AR class.
*
* Note that an array should be returned even for a table with single primary key.
*
* @return string[] the primary keys of the associated database table.
*/
public static function primaryKey() // TODO: refactor should be abstract in an ActiveRecord base class
{
return array();
}
// TODO implement link and unlink
}
