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ActiveFinder.php
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ActiveFinder.php
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<?php
/**
* It is a copy of original CActiveFinder class of Yii. I changed it and added a function getCommand() to get the SQL generated
* from criteria being passed to the method. Since CommandBuider does not support creation of JOIN stuff from criteria.
*
* Class ActiveFinder
*/
class ActiveFinder extends CComponent
{
/**
* @var boolean join all tables all at once. Defaults to false.
* This property is internally used.
*/
public $joinAll=false;
/**
* @var boolean whether the base model has limit or offset.
* This property is internally used.
*/
public $baseLimited=false;
private $_joinCount=0;
private $_joinTree;
private $_builder;
/**
* Constructor.
* A join tree is built up based on the declared relationships between active record classes.
* @param CActiveRecord $model the model that initiates the active finding process
* @param mixed $with the relation names to be actively looked for
*/
public function __construct($model,$with)
{
$this->_builder=$model->getCommandBuilder();
$this->_joinTree=new JoinElement($this,$model);
$this->buildJoinTree($this->_joinTree,$with);
}
/**
* Do not call this method. This method is used internally to perform the relational query
* based on the given DB criteria.
* @param CDbCriteria $criteria the DB criteria
* @param boolean $all whether to bring back all records
* @return mixed the query result
*/
public static function getCommand($model, $criteria)
{
$model = new ActiveFinder($model, $criteria->with);
$model->joinAll=$criteria->together===true;
if($criteria->alias!='')
{
$model->_joinTree->tableAlias=$criteria->alias;
$model->_joinTree->rawTableAlias=$model->_builder->getSchema()->quoteTableName($criteria->alias);
}
$command = $model->_joinTree->find($criteria);
return $command;
}
/**
* This method is internally called.
* @param CDbCriteria $criteria the query criteria
* @return string
*/
public function count($criteria)
{
Yii::trace(get_class($this->_joinTree->model).'.count() eagerly','system.db.ar.CActiveRecord');
$this->joinAll=$criteria->together!==true;
$alias=$criteria->alias===null ? 't' : $criteria->alias;
$this->_joinTree->tableAlias=$alias;
$this->_joinTree->rawTableAlias=$this->_builder->getSchema()->quoteTableName($alias);
$n=$this->_joinTree->count($criteria);
$this->destroyJoinTree();
return $n;
}
/**
* Finds the related objects for the specified active record.
* This method is internally invoked by {@link CActiveRecord} to support lazy loading.
* @param CActiveRecord $baseRecord the base record whose related objects are to be loaded
*/
public function lazyFind($baseRecord)
{
$this->_joinTree->lazyFind($baseRecord);
if(!empty($this->_joinTree->children))
{
foreach($this->_joinTree->children as $child)
$child->afterFind();
}
$this->destroyJoinTree();
}
private function destroyJoinTree()
{
if($this->_joinTree!==null)
$this->_joinTree->destroy();
$this->_joinTree=null;
}
/**
* Builds up the join tree representing the relationships involved in this query.
*
*@param JoinElement $parent the parent tree node
* @param mixed $with the names of the related objects relative to the parent tree node
* @param array $options additional query options to be merged with the relation
*/
private function buildJoinTree($parent,$with,$options=null)
{
if($parent instanceof CStatElement)
throw new CDbException(Yii::t('yii','The STAT relation "{name}" cannot have child relations.',
array('{name}'=>$parent->relation->name)));
if(is_string($with))
{
if(($pos=strrpos($with,'.'))!==false)
{
$parent=$this->buildJoinTree($parent,substr($with,0,$pos));
$with=substr($with,$pos+1);
}
// named scope
$scopes=array();
if(($pos=strpos($with,':'))!==false)
{
$scopes=explode(':',substr($with,$pos+1));
$with=substr($with,0,$pos);
}
if(isset($parent->children[$with]) && $parent->children[$with]->master===null)
return $parent->children[$with];
if(($relation=$parent->model->getActiveRelation($with))===null)
throw new CDbException(Yii::t('yii','Relation "{name}" is not defined in active record class "{class}".',
array('{class}'=>get_class($parent->model), '{name}'=>$with)));
$relation=clone $relation;
$model=CActiveRecord::model($relation->className);
if($relation instanceof CActiveRelation)
{
$oldAlias=$model->getTableAlias(false,false);
if(isset($options['alias']))
$model->setTableAlias($options['alias']);
elseif($relation->alias===null)
$model->setTableAlias($relation->name);
else
$model->setTableAlias($relation->alias);
}
if(!empty($relation->scopes))
$scopes=array_merge($scopes,(array)$relation->scopes); // no need for complex merging
if(!empty($options['scopes']))
$scopes=array_merge($scopes,(array)$options['scopes']); // no need for complex merging
$model->resetScope(false);
$criteria=$model->getDbCriteria();
$criteria->scopes=$scopes;
$model->beforeFindInternal();
$model->applyScopes($criteria);
// select has a special meaning in stat relation, so we need to ignore select from scope or model criteria
if($relation instanceof CStatRelation)
$criteria->select='*';
$relation->mergeWith($criteria,true);
// dynamic options
if($options!==null)
$relation->mergeWith($options);
if($relation instanceof CActiveRelation)
$model->setTableAlias($oldAlias);
if($relation instanceof CStatRelation)
return new CStatElement($this,$relation,$parent);
else
{
if(isset($parent->children[$with]))
{
$element=$parent->children[$with];
$element->relation=$relation;
}
else
$element=new JoinElement($this,$relation,$parent,++$this->_joinCount);
if(!empty($relation->through))
{
$slave=$this->buildJoinTree($parent,$relation->through,array('select'=>false));
$slave->master=$element;
$element->slave=$slave;
}
$parent->children[$with]=$element;
if(!empty($relation->with))
$this->buildJoinTree($element,$relation->with);
return $element;
}
}
// $with is an array, keys are relation name, values are relation spec
foreach($with as $key=>$value)
{
if(is_string($value)) // the value is a relation name
$this->buildJoinTree($parent,$value);
elseif(is_string($key) && is_array($value))
$this->buildJoinTree($parent,$key,$value);
}
}
}
/**
* CJoinElement represents a tree node in the join tree created by {@link CActiveFinder}.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @package system.db.ar
* @since 1.0
*/
class JoinElement
{
/**
* @var integer the unique ID of this tree node
*/
public $id;
/**
* @var CActiveRelation the relation represented by this tree node
*/
public $relation;
/**
* @var CActiveRelation the master relation
*/
public $master;
/**
* @var CActiveRelation the slave relation
*/
public $slave;
/**
* @var CActiveRecord the model associated with this tree node
*/
public $model;
/**
* @var array list of active records found by the queries. They are indexed by primary key values.
*/
public $records=array();
/**
* @var array list of child join elements
*/
public $children=array();
/**
* @var array list of stat elements
*/
public $stats=array();
/**
* @var string table alias for this join element
*/
public $tableAlias;
/**
* @var string the quoted table alias for this element
*/
public $rawTableAlias;
private $_finder;
private $_builder;
private $_parent;
private $_pkAlias; // string or name=>alias
private $_columnAliases=array(); // name=>alias
private $_joined=false;
private $_table;
private $_related=array(); // PK, relation name, related PK => true
/**
* Constructor.
*
*@param CActiveFinder $finder the finder
* @param mixed $relation the relation (if the third parameter is not null)
* or the model (if the third parameter is null) associated with this tree node.
* @param JoinElement $parent the parent tree node
* @param integer $id the ID of this tree node that is unique among all the tree nodes
*/
public function __construct($finder,$relation,$parent=null,$id=0)
{
$this->_finder=$finder;
$this->id=$id;
if($parent!==null)
{
$this->relation=$relation;
$this->_parent=$parent;
$this->model=CActiveRecord::model($relation->className);
$this->_builder=$this->model->getCommandBuilder();
$this->tableAlias=$relation->alias===null?$relation->name:$relation->alias;
$this->rawTableAlias=$this->_builder->getSchema()->quoteTableName($this->tableAlias);
$this->_table=$this->model->getTableSchema();
}
else // root element, the first parameter is the model.
{
$this->model=$relation;
$this->_builder=$relation->getCommandBuilder();
$this->_table=$relation->getTableSchema();
$this->tableAlias=$this->model->getTableAlias();
$this->rawTableAlias=$this->_builder->getSchema()->quoteTableName($this->tableAlias);
}
// set up column aliases, such as t1_c2
$table=$this->_table;
if($this->model->getDbConnection()->getDriverName()==='oci') // Issue 482
$prefix='T'.$id.'_C';
else
$prefix='t'.$id.'_c';
foreach($table->getColumnNames() as $key=>$name)
{
$alias=$prefix.$key;
$this->_columnAliases[$name]=$alias;
if($table->primaryKey===$name)
$this->_pkAlias=$alias;
elseif(is_array($table->primaryKey) && in_array($name,$table->primaryKey))
$this->_pkAlias[$name]=$alias;
}
}
/**
* Removes references to child elements and finder to avoid circular references.
* This is internally used.
*/
public function destroy()
{
if(!empty($this->children))
{
foreach($this->children as $child)
$child->destroy();
}
unset($this->_finder, $this->_parent, $this->model, $this->relation, $this->master, $this->slave, $this->records, $this->children, $this->stats);
}
/**
* Performs the recursive finding with the criteria.
* @param CDbCriteria $criteria the query criteria
*/
public function find($criteria=null)
{
if($this->_parent===null) // root element
{
$query=new JoinQuery($this,$criteria);
$this->_finder->baseLimited=($criteria->offset>=0 || $criteria->limit>=0);
$this->buildQuery($query);
}
elseif(!$this->_joined && !empty($this->_parent->records)) // not joined before
{
$query=new JoinQuery($this->_parent);
$this->_joined=true;
$query->join($this);
$this->buildQuery($query);
}
return $query->createCommand($this->_builder);
/*foreach($this->children as $child) // find recursively
$child->find();
foreach($this->stats as $stat)
$stat->query();*/
}
/**
* Builds the join query with all descendant HAS_ONE and BELONGS_TO nodes.
*
*@param JoinQuery $query the query being built up
*/
public function buildQuery($query)
{
foreach($this->children as $child)
{
if($child->master!==null)
$child->_joined=true;
elseif($child->relation instanceof CHasOneRelation || $child->relation instanceof CBelongsToRelation
|| $this->_finder->joinAll || $child->relation->together || (!$this->_finder->baseLimited && $child->relation->together===null))
{
$child->_joined=true;
$query->join($child);
$child->buildQuery($query);
}
}
}
/**
* Executes the join query and populates the query results.
*
*@param JoinQuery $query the query to be executed.
*/
public function runQuery($query)
{
$command=$query->createCommand($this->_builder);
foreach($command->queryAll() as $row)
$this->populateRecord($query,$row);
}
/**
* Populates the active records with the query data.
*
* @param JoinQuery $query the query executed
* @param array $row a row of data
*
*@return CActiveRecord the populated record
*/
private function populateRecord($query,$row)
{
// determine the primary key value
if(is_string($this->_pkAlias)) // single key
{
if(isset($row[$this->_pkAlias]))
$pk=$row[$this->_pkAlias];
else // no matching related objects
return null;
}
else // is_array, composite key
{
$pk=array();
foreach($this->_pkAlias as $name=>$alias)
{
if(isset($row[$alias]))
$pk[$name]=$row[$alias];
else // no matching related objects
return null;
}
$pk=serialize($pk);
}
// retrieve or populate the record according to the primary key value
if(isset($this->records[$pk]))
$record=$this->records[$pk];
else
{
$this->records[]=$pk;
}
}
/**
* @return string the table name and the table alias (if any). This can be used directly in SQL query without escaping.
*/
public function getTableNameWithAlias()
{
if($this->tableAlias!==null)
return $this->_table->rawName . ' ' . $this->rawTableAlias;
else
return $this->_table->rawName;
}
/**
* Generates the list of columns to be selected.
* Columns will be properly aliased and primary keys will be added to selection if they are not specified.
* @param mixed $select columns to be selected. Defaults to '*', indicating all columns.
* @return string the column selection
*/
public function getColumnSelect($select='*')
{
$schema=$this->_builder->getSchema();
$prefix=$this->getColumnPrefix();
$columns=array();
if($select==='*')
{
foreach($this->_table->getColumnNames() as $name)
$columns[]=$prefix.$schema->quoteColumnName($name).' AS '.$schema->quoteColumnName($this->_columnAliases[$name]);
}
else
{
if(is_string($select))
$select=explode(',',$select);
$selected=array();
foreach($select as $name)
{
$name=trim($name);
$matches=array();
if(($pos=strrpos($name,'.'))!==false)
$key=substr($name,$pos+1);
else
$key=$name;
$key=trim($key,'\'"`');
if($key==='*')
{
foreach($this->_table->columns as $name=>$column)
{
$alias=$this->_columnAliases[$name];
if(!isset($selected[$alias]))
{
$columns[]=$prefix.$column->rawName.' AS '.$schema->quoteColumnName($alias);
$selected[$alias]=1;
}
}
continue;
}
if(isset($this->_columnAliases[$key])) // simple column names
{
$columns[]=$prefix.$schema->quoteColumnName($key).' AS '.$schema->quoteColumnName($this->_columnAliases[$key]);
$selected[$this->_columnAliases[$key]]=1;
}
elseif(preg_match('/^(.*?)\s+AS\s+(\w+)$/im',$name,$matches)) // if the column is already aliased
{
$alias=$matches[2];
if(!isset($this->_columnAliases[$alias]) || $this->_columnAliases[$alias]!==$alias)
{
$this->_columnAliases[$alias]=$alias;
$columns[]=$name;
$selected[$alias]=1;
}
}
else
throw new CDbException(Yii::t('yii','Active record "{class}" is trying to select an invalid column "{column}". Note, the column must exist in the table or be an expression with alias.',
array('{class}'=>get_class($this->model), '{column}'=>$name)));
}
// add primary key selection if they are not selected
if(is_string($this->_pkAlias) && !isset($selected[$this->_pkAlias]))
$columns[]=$prefix.$schema->quoteColumnName($this->_table->primaryKey).' AS '.$schema->quoteColumnName($this->_pkAlias);
elseif(is_array($this->_pkAlias))
{
foreach($this->_table->primaryKey as $name)
if(!isset($selected[$name]))
$columns[]=$prefix.$schema->quoteColumnName($name).' AS '.$schema->quoteColumnName($this->_pkAlias[$name]);
}
}
return implode(', ',$columns);
}
/**
* @return string the primary key selection
*/
public function getPrimaryKeySelect()
{
$schema=$this->_builder->getSchema();
$prefix=$this->getColumnPrefix();
$columns=array();
if(is_string($this->_pkAlias))
$columns[]=$prefix.$schema->quoteColumnName($this->_table->primaryKey).' AS '.$schema->quoteColumnName($this->_pkAlias);
elseif(is_array($this->_pkAlias))
{
foreach($this->_pkAlias as $name=>$alias)
$columns[]=$prefix.$schema->quoteColumnName($name).' AS '.$schema->quoteColumnName($alias);
}
return implode(', ',$columns);
}
/**
* @return string the condition that specifies only the rows with the selected primary key values.
*/
public function getPrimaryKeyRange()
{
if(empty($this->records))
return '';
$values=array_keys($this->records);
if(is_array($this->_table->primaryKey))
{
foreach($values as &$value)
$value=unserialize($value);
}
return $this->_builder->createInCondition($this->_table,$this->_table->primaryKey,$values,$this->getColumnPrefix());
}
/**
* @return string the column prefix for column reference disambiguation
*/
public function getColumnPrefix()
{
if($this->tableAlias!==null)
return $this->rawTableAlias.'.';
else
return $this->_table->rawName.'.';
}
/**
* @return string the join statement (this node joins with its parent)
*/
public function getJoinCondition()
{
$parent=$this->_parent;
if($this->relation instanceof CManyManyRelation)
{
$schema=$this->_builder->getSchema();
$joinTableName=$this->relation->getJunctionTableName();
if(($joinTable=$schema->getTable($joinTableName))===null)
throw new CDbException(Yii::t('yii','The relation "{relation}" in active record class "{class}" is not specified correctly: the join table "{joinTable}" given in the foreign key cannot be found in the database.',
array('{class}'=>get_class($parent->model), '{relation}'=>$this->relation->name, '{joinTable}'=>$joinTableName)));
$fks=$this->relation->getJunctionForeignKeys();
return $this->joinManyMany($joinTable,$fks,$parent);
}
else
{
$fks=is_array($this->relation->foreignKey) ? $this->relation->foreignKey : preg_split('/\s*,\s*/',$this->relation->foreignKey,-1,PREG_SPLIT_NO_EMPTY);
if($this->relation instanceof CBelongsToRelation)
{
$pke=$this;
$fke=$parent;
}
elseif($this->slave===null)
{
$pke=$parent;
$fke=$this;
}
else
{
$pke=$this;
$fke=$this->slave;
}
return $this->joinOneMany($fke,$fks,$pke,$parent);
}
}
/**
* Generates the join statement for one-many relationship.
* This works for HAS_ONE, HAS_MANY and BELONGS_TO.
*
*@param JoinElement $fke the join element containing foreign keys
* @param array $fks the foreign keys
* @param JoinElement $pke the join element containg primary keys
* @param JoinElement $parent the parent join element
*
*@return string the join statement
* @throws CDbException if a foreign key is invalid
*/
private function joinOneMany($fke,$fks,$pke,$parent)
{
$schema=$this->_builder->getSchema();
$joins=array();
if(is_string($fks))
$fks=preg_split('/\s*,\s*/',$fks,-1,PREG_SPLIT_NO_EMPTY);
foreach($fks as $i=>$fk)
{
if(!is_int($i))
{
$pk=$fk;
$fk=$i;
}
if(!isset($fke->_table->columns[$fk]))
throw new CDbException(Yii::t('yii','The relation "{relation}" in active record class "{class}" is specified with an invalid foreign key "{key}". There is no such column in the table "{table}".',
array('{class}'=>get_class($parent->model), '{relation}'=>$this->relation->name, '{key}'=>$fk, '{table}'=>$fke->_table->name)));
if(is_int($i))
{
if(isset($fke->_table->foreignKeys[$fk]) && $schema->compareTableNames($pke->_table->rawName, $fke->_table->foreignKeys[$fk][0]))
$pk=$fke->_table->foreignKeys[$fk][1];
else // FK constraints undefined
{
if(is_array($pke->_table->primaryKey)) // composite PK
$pk=$pke->_table->primaryKey[$i];
else
$pk=$pke->_table->primaryKey;
}
}
$joins[]=$fke->getColumnPrefix().$schema->quoteColumnName($fk) . '=' . $pke->getColumnPrefix().$schema->quoteColumnName($pk);
}
if(!empty($this->relation->on))
$joins[]=$this->relation->on;
return $this->relation->joinType . ' ' . $this->getTableNameWithAlias() . ' ON (' . implode(') AND (',$joins).')';
}
/**
* Generates the join statement for many-many relationship.
*
*@param CDbTableSchema $joinTable the join table
* @param array $fks the foreign keys
* @param JoinElement $parent the parent join element
*
*@return string the join statement
* @throws CDbException if a foreign key is invalid
*/
private function joinManyMany($joinTable,$fks,$parent)
{
$schema=$this->_builder->getSchema();
$joinAlias=$schema->quoteTableName($this->relation->name.'_'.$this->tableAlias);
$parentCondition=array();
$childCondition=array();
$fkDefined=true;
foreach($fks as $i=>$fk)
{
if(!isset($joinTable->columns[$fk]))
throw new CDbException(Yii::t('yii','The relation "{relation}" in active record class "{class}" is specified with an invalid foreign key "{key}". There is no such column in the table "{table}".',
array('{class}'=>get_class($parent->model), '{relation}'=>$this->relation->name, '{key}'=>$fk, '{table}'=>$joinTable->name)));
if(isset($joinTable->foreignKeys[$fk]))
{
list($tableName,$pk)=$joinTable->foreignKeys[$fk];
if(!isset($parentCondition[$pk]) && $schema->compareTableNames($parent->_table->rawName,$tableName))
$parentCondition[$pk]=$parent->getColumnPrefix().$schema->quoteColumnName($pk).'='.$joinAlias.'.'.$schema->quoteColumnName($fk);
elseif(!isset($childCondition[$pk]) && $schema->compareTableNames($this->_table->rawName,$tableName))
$childCondition[$pk]=$this->getColumnPrefix().$schema->quoteColumnName($pk).'='.$joinAlias.'.'.$schema->quoteColumnName($fk);
else
{
$fkDefined=false;
break;
}
}
else
{
$fkDefined=false;
break;
}
}
if(!$fkDefined)
{
$parentCondition=array();
$childCondition=array();
foreach($fks as $i=>$fk)
{
if($i<count($parent->_table->primaryKey))
{
$pk=is_array($parent->_table->primaryKey) ? $parent->_table->primaryKey[$i] : $parent->_table->primaryKey;
$parentCondition[$pk]=$parent->getColumnPrefix().$schema->quoteColumnName($pk).'='.$joinAlias.'.'.$schema->quoteColumnName($fk);
}
else
{
$j=$i-count($parent->_table->primaryKey);
$pk=is_array($this->_table->primaryKey) ? $this->_table->primaryKey[$j] : $this->_table->primaryKey;
$childCondition[$pk]=$this->getColumnPrefix().$schema->quoteColumnName($pk).'='.$joinAlias.'.'.$schema->quoteColumnName($fk);
}
}
}
if($parentCondition!==array() && $childCondition!==array())
{
$join=$this->relation->joinType.' '.$joinTable->rawName.' '.$joinAlias;
$join.=' ON ('.implode(') AND (',$parentCondition).')';
$join.=' '.$this->relation->joinType.' '.$this->getTableNameWithAlias();
$join.=' ON ('.implode(') AND (',$childCondition).')';
if(!empty($this->relation->on))
$join.=' AND ('.$this->relation->on.')';
return $join;
}
else
throw new CDbException(Yii::t('yii','The relation "{relation}" in active record class "{class}" is specified with an incomplete foreign key. The foreign key must consist of columns referencing both joining tables.',
array('{class}'=>get_class($parent->model), '{relation}'=>$this->relation->name)));
}
}
/**
* CJoinQuery represents a JOIN SQL statement.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @package system.db.ar
* @since 1.0
*/
class JoinQuery
{
/**
* @var array list of column selections
*/
public $selects=array();
/**
* @var boolean whether to select distinct result set
*/
public $distinct=false;
/**
* @var array list of join statement
*/
public $joins=array();
/**
* @var array list of WHERE clauses
*/
public $conditions=array();
/**
* @var array list of ORDER BY clauses
*/
public $orders=array();
/**
* @var array list of GROUP BY clauses
*/
public $groups=array();
/**
* @var array list of HAVING clauses
*/
public $havings=array();
/**
* @var integer row limit
*/
public $limit=-1;
/**
* @var integer row offset
*/
public $offset=-1;
/**
* @var array list of query parameters
*/
public $params=array();
/**
* @var array list of join element IDs (id=>true)
*/
public $elements=array();
/**
* Constructor.
*
* @param JoinElement $joinElement The root join tree.
* @param CDbCriteria $criteria the query criteria
*/
public function __construct($joinElement,$criteria=null)
{
if($criteria!==null)
{
$this->selects[]=$joinElement->getColumnSelect($criteria->select);
$this->joins[]=$joinElement->getTableNameWithAlias();
$this->joins[]=$criteria->join;
$this->conditions[]=$criteria->condition;
$this->orders[]=$criteria->order;
$this->groups[]=$criteria->group;
$this->havings[]=$criteria->having;
$this->limit=$criteria->limit;
$this->offset=$criteria->offset;
$this->params=$criteria->params;
if(!$this->distinct && $criteria->distinct)
$this->distinct=true;
}
else
{
$this->selects[]=$joinElement->getPrimaryKeySelect();
$this->joins[]=$joinElement->getTableNameWithAlias();
$this->conditions[]=$joinElement->getPrimaryKeyRange();
}
$this->elements[$joinElement->id]=true;
}
/**
* Joins with another join element
*
* @param JoinElement $element the element to be joined
*/
public function join($element)
{
if($element->slave!==null)
$this->join($element->slave);
if(!empty($element->relation->select))
$this->selects[]=$element->getColumnSelect($element->relation->select);
$this->conditions[]=$element->relation->condition;
$this->orders[]=$element->relation->order;
$this->joins[]=$element->getJoinCondition();
$this->joins[]=$element->relation->join;
$this->groups[]=$element->relation->group;
$this->havings[]=$element->relation->having;
if(is_array($element->relation->params))
{
if(is_array($this->params))
$this->params=array_merge($this->params,$element->relation->params);
else
$this->params=$element->relation->params;
}
$this->elements[$element->id]=true;
}
/**
* Creates the SQL statement.
* @param CDbCommandBuilder $builder the command builder
* @return CDbCommand DB command instance representing the SQL statement
*/
public function createCommand($builder)
{
$sql=($this->distinct ? 'SELECT DISTINCT ':'SELECT ') . implode(', ',$this->selects);
$sql.=' FROM ' . implode(' ',$this->joins);
$conditions=array();
foreach($this->conditions as $condition)
if($condition!=='')
$conditions[]=$condition;
if($conditions!==array())
$sql.=' WHERE (' . implode(') AND (',$conditions).')';
$groups=array();
foreach($this->groups as $group)
if($group!=='')
$groups[]=$group;
if($groups!==array())
$sql.=' GROUP BY ' . implode(', ',$groups);
$havings=array();
foreach($this->havings as $having)
if($having!=='')
$havings[]=$having;
if($havings!==array())
$sql.=' HAVING (' . implode(') AND (',$havings).')';
$orders=array();
foreach($this->orders as $order)
if($order!=='')
$orders[]=$order;
if($orders!==array())
$sql.=' ORDER BY ' . implode(', ',$orders);
$sql=$builder->applyLimit($sql,$this->limit,$this->offset);
$command=$builder->getDbConnection()->createCommand($sql);
$builder->bindValues($command,$this->params);
return $command;
}
}