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Draft implementation of ActiveQuery::joinWith().

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This commit is contained in:
Qiang Xue
2013-12-23 22:26:44 -05:00
parent d50fd7067b
commit 2402d2d031
2 changed files with 164 additions and 0 deletions
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137
framework/yii/db/ActiveQuery.php
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@ -143,4 +143,141 @@ class ActiveQuery extends Query implements ActiveQueryInterface
}
return $db->createCommand($sql, $params);
}
public function joinWith($with, $eagerLoading = true, $joinType = 'INNER JOIN')
{
$with = (array)$with;
$this->joinWithRelations(new $this->modelClass, $with, $joinType);
if (is_array($eagerLoading)) {
foreach ($with as $name => $callback) {
if (is_integer($name)) {
if (!in_array($callback, $eagerLoading, true)) {
unset($with[$name]);
}
} elseif (!in_array($name, $eagerLoading, true)) {
unset($with[$name]);
}
}
$this->with($with);
} elseif ($eagerLoading) {
$this->with($with);
}
return $this;
}
/**
* @param ActiveRecord $model
* @param array $with
* @param string|array $joinType
*/
private function joinWithRelations($model, $with, $joinType)
{
$relations = [];
foreach ($with as $name => $callback) {
if (is_integer($name)) {
$name = $callback;
$callback = null;
}
$primaryModel = $model;
$parent = $this;
$prefix = '';
while (($pos = strpos($name, '.')) !== false) {
$childName = substr($name, $pos + 1);
$name = substr($name, 0, $pos);
$fullName = $prefix === '' ? $name : "$prefix.$name";
if (!isset($relations[$fullName])) {
$relations[$fullName] = $relation = $primaryModel->getRelation($name);
$this->joinWithRelation($parent, $relation, $this->getJoinType($joinType, $fullName));
} else {
$relation = $relations[$fullName];
}
$primaryModel = new $relation->modelClass;
$parent = $relation;
$prefix = $fullName;
$name = $childName;
}
$fullName = $prefix === '' ? $name : "$prefix.$name";
if (!isset($relations[$fullName])) {
$relations[$fullName] = $relation = $primaryModel->getRelation($name);
if ($callback !== null) {
call_user_func($callback, $relation);
}
$this->joinWithRelation($parent, $relation, $this->getJoinType($joinType, $fullName));
}
}
}
private function getJoinType($joinType, $name)
{
if (is_array($joinType) && isset($joinType[$name])) {
return $joinType[$name];
} else {
return is_string($joinType) ? $joinType : 'INNER JOIN';
}
}
/**
* @param ActiveQuery $query
* @return string
*/
private function getQueryTableName($query)
{
if (empty($query->from)) {
/** @var ActiveRecord $modelClass */
$modelClass = $query->modelClass;
return $modelClass::tableName();
} else {
return reset($query->from);
}
}
/**
* @param ActiveQuery $parent
* @param ActiveRelation $child
* @param string $joinType
*/
private function joinWithRelation($parent, $child, $joinType)
{
$parentTable = $this->getQueryTableName($parent);
$childTable = $this->getQueryTableName($child);
if (!empty($child->link)) {
$on = [];
foreach ($child->link as $childColumn => $parentColumn) {
$on[] = '{{' . $parentTable . "}}.[[$parentColumn]] = {{" . $childTable . "}}.[[$childColumn]]";
}
$on = implode(' AND ', $on);
} else {
$on = '';
}
$this->join($joinType, $childTable, $on);
if (!empty($child->where)) {
$this->andWhere($child->where);
}
if (!empty($child->having)) {
$this->andHaving($child->having);
}
if (!empty($child->orderBy)) {
$this->addOrderBy($child->orderBy);
}
if (!empty($child->groupBy)) {
$this->addGroupBy($child->groupBy);
}
if (!empty($child->params)) {
$this->addParams($child->params);
}
if (!empty($child->join)) {
foreach ($child->join as $join) {
$this->join[] = $join;
}
}
if (!empty($child->union)) {
foreach ($child->union as $union) {
$this->union[] = $union;
}
}
}
}