www.gusucode.com > Flarum PHP论坛 中文版 v0.1 beta7源码程序 > FlarumChina-master/vendor/illuminate/database/Eloquent/Relations/HasOneOrMany.php
<?php
namespace Illuminate\Database\Eloquent\Relations;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Query\Expression;
use Illuminate\Database\Eloquent\Collection;
abstract class HasOneOrMany extends Relation
{
/**
* The foreign key of the parent model.
*
* @var string
*/
protected $foreignKey;
/**
* The local key of the parent model.
*
* @var string
*/
protected $localKey;
/**
* Create a new has one or many relationship instance.
*
* @param \Illuminate\Database\Eloquent\Builder $query
* @param \Illuminate\Database\Eloquent\Model $parent
* @param string $foreignKey
* @param string $localKey
* @return void
*/
public function __construct(Builder $query, Model $parent, $foreignKey, $localKey)
{
$this->localKey = $localKey;
$this->foreignKey = $foreignKey;
parent::__construct($query, $parent);
}
/**
* Set the base constraints on the relation query.
*
* @return void
*/
public function addConstraints()
{
if (static::$constraints) {
$this->query->where($this->foreignKey, '=', $this->getParentKey());
$this->query->whereNotNull($this->foreignKey);
}
}
/**
* Add the constraints for a relationship count query.
*
* @param \Illuminate\Database\Eloquent\Builder $query
* @param \Illuminate\Database\Eloquent\Builder $parent
* @return \Illuminate\Database\Eloquent\Builder
*/
public function getRelationCountQuery(Builder $query, Builder $parent)
{
if ($parent->getQuery()->from == $query->getQuery()->from) {
return $this->getRelationCountQueryForSelfRelation($query, $parent);
}
return parent::getRelationCountQuery($query, $parent);
}
/**
* Add the constraints for a relationship count query on the same table.
*
* @param \Illuminate\Database\Eloquent\Builder $query
* @param \Illuminate\Database\Eloquent\Builder $parent
* @return \Illuminate\Database\Eloquent\Builder
*/
public function getRelationCountQueryForSelfRelation(Builder $query, Builder $parent)
{
$query->select(new Expression('count(*)'));
$query->from($query->getModel()->getTable().' as '.$hash = $this->getRelationCountHash());
$query->getModel()->setTable($hash);
$key = $this->wrap($this->getQualifiedParentKeyName());
return $query->where($hash.'.'.$this->getPlainForeignKey(), '=', new Expression($key));
}
/**
* Get a relationship join table hash.
*
* @return string
*/
public function getRelationCountHash()
{
return 'self_'.md5(microtime(true));
}
/**
* Set the constraints for an eager load of the relation.
*
* @param array $models
* @return void
*/
public function addEagerConstraints(array $models)
{
$this->query->whereIn($this->foreignKey, $this->getKeys($models, $this->localKey));
}
/**
* Match the eagerly loaded results to their single parents.
*
* @param array $models
* @param \Illuminate\Database\Eloquent\Collection $results
* @param string $relation
* @return array
*/
public function matchOne(array $models, Collection $results, $relation)
{
return $this->matchOneOrMany($models, $results, $relation, 'one');
}
/**
* Match the eagerly loaded results to their many parents.
*
* @param array $models
* @param \Illuminate\Database\Eloquent\Collection $results
* @param string $relation
* @return array
*/
public function matchMany(array $models, Collection $results, $relation)
{
return $this->matchOneOrMany($models, $results, $relation, 'many');
}
/**
* Match the eagerly loaded results to their many parents.
*
* @param array $models
* @param \Illuminate\Database\Eloquent\Collection $results
* @param string $relation
* @param string $type
* @return array
*/
protected function matchOneOrMany(array $models, Collection $results, $relation, $type)
{
$dictionary = $this->buildDictionary($results);
// Once we have the dictionary we can simply spin through the parent models to
// link them up with their children using the keyed dictionary to make the
// matching very convenient and easy work. Then we'll just return them.
foreach ($models as $model) {
$key = $model->getAttribute($this->localKey);
if (isset($dictionary[$key])) {
$value = $this->getRelationValue($dictionary, $key, $type);
$model->setRelation($relation, $value);
}
}
return $models;
}
/**
* Get the value of a relationship by one or many type.
*
* @param array $dictionary
* @param string $key
* @param string $type
* @return mixed
*/
protected function getRelationValue(array $dictionary, $key, $type)
{
$value = $dictionary[$key];
return $type == 'one' ? reset($value) : $this->related->newCollection($value);
}
/**
* Build model dictionary keyed by the relation's foreign key.
*
* @param \Illuminate\Database\Eloquent\Collection $results
* @return array
*/
protected function buildDictionary(Collection $results)
{
$dictionary = [];
$foreign = $this->getPlainForeignKey();
// First we will create a dictionary of models keyed by the foreign key of the
// relationship as this will allow us to quickly access all of the related
// models without having to do nested looping which will be quite slow.
foreach ($results as $result) {
$dictionary[$result->{$foreign}][] = $result;
}
return $dictionary;
}
/**
* Attach a model instance to the parent model.
*
* @param \Illuminate\Database\Eloquent\Model $model
* @return \Illuminate\Database\Eloquent\Model
*/
public function save(Model $model)
{
$model->setAttribute($this->getPlainForeignKey(), $this->getParentKey());
return $model->save() ? $model : false;
}
/**
* Attach a collection of models to the parent instance.
*
* @param \Illuminate\Database\Eloquent\Collection|array $models
* @return \Illuminate\Database\Eloquent\Collection|array
*/
public function saveMany($models)
{
foreach ($models as $model) {
$this->save($model);
}
return $models;
}
/**
* Find a model by its primary key or return new instance of the related model.
*
* @param mixed $id
* @param array $columns
* @return \Illuminate\Support\Collection|\Illuminate\Database\Eloquent\Model
*/
public function findOrNew($id, $columns = ['*'])
{
if (is_null($instance = $this->find($id, $columns))) {
$instance = $this->related->newInstance();
$instance->setAttribute($this->getPlainForeignKey(), $this->getParentKey());
}
return $instance;
}
/**
* Get the first related model record matching the attributes or instantiate it.
*
* @param array $attributes
* @return \Illuminate\Database\Eloquent\Model
*/
public function firstOrNew(array $attributes)
{
if (is_null($instance = $this->where($attributes)->first())) {
$instance = $this->related->newInstance($attributes);
$instance->setAttribute($this->getPlainForeignKey(), $this->getParentKey());
}
return $instance;
}
/**
* Get the first related record matching the attributes or create it.
*
* @param array $attributes
* @return \Illuminate\Database\Eloquent\Model
*/
public function firstOrCreate(array $attributes)
{
if (is_null($instance = $this->where($attributes)->first())) {
$instance = $this->create($attributes);
}
return $instance;
}
/**
* Create or update a related record matching the attributes, and fill it with values.
*
* @param array $attributes
* @param array $values
* @return \Illuminate\Database\Eloquent\Model
*/
public function updateOrCreate(array $attributes, array $values = [])
{
$instance = $this->firstOrNew($attributes);
$instance->fill($values);
$instance->save();
return $instance;
}
/**
* Create a new instance of the related model.
*
* @param array $attributes
* @return \Illuminate\Database\Eloquent\Model
*/
public function create(array $attributes)
{
// Here we will set the raw attributes to avoid hitting the "fill" method so
// that we do not have to worry about a mass accessor rules blocking sets
// on the models. Otherwise, some of these attributes will not get set.
$instance = $this->related->newInstance($attributes);
$instance->setAttribute($this->getPlainForeignKey(), $this->getParentKey());
$instance->save();
return $instance;
}
/**
* Create an array of new instances of the related model.
*
* @param array $records
* @return array
*/
public function createMany(array $records)
{
$instances = [];
foreach ($records as $record) {
$instances[] = $this->create($record);
}
return $instances;
}
/**
* Perform an update on all the related models.
*
* @param array $attributes
* @return int
*/
public function update(array $attributes)
{
if ($this->related->usesTimestamps()) {
$attributes[$this->relatedUpdatedAt()] = $this->related->freshTimestampString();
}
return $this->query->update($attributes);
}
/**
* Get the key for comparing against the parent key in "has" query.
*
* @return string
*/
public function getHasCompareKey()
{
return $this->getForeignKey();
}
/**
* Get the foreign key for the relationship.
*
* @return string
*/
public function getForeignKey()
{
return $this->foreignKey;
}
/**
* Get the plain foreign key.
*
* @return string
*/
public function getPlainForeignKey()
{
$segments = explode('.', $this->getForeignKey());
return $segments[count($segments) - 1];
}
/**
* Get the key value of the parent's local key.
*
* @return mixed
*/
public function getParentKey()
{
return $this->parent->getAttribute($this->localKey);
}
/**
* Get the fully qualified parent key name.
*
* @return string
*/
public function getQualifiedParentKeyName()
{
return $this->parent->getTable().'.'.$this->localKey;
}
}