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Merge pull request #374 from phalcon/2.0.x
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,238 @@ | ||
| <?php namespace Phalcon\Mvc\Model\EagerLoading; | ||
|
|
||
| use Phalcon\Mvc\Model\Relation; | ||
| use Phalcon\Mvc\Model\Resultset; | ||
| use Phalcon\Mvc\Model\Query\Builder; | ||
|
|
||
| /** | ||
| * Represents a level in the relations tree to be eagerly loaded | ||
| */ | ||
| final class EagerLoad | ||
| { | ||
| /** @var RelationInterface */ | ||
| private $relation; | ||
| /** @var null|callable */ | ||
| private $constraints; | ||
| /** @var Loader|EagerLoad */ | ||
| private $parent; | ||
| /** @var null|Phalcon\Mvc\ModelInterface[] */ | ||
| private $subject; | ||
| /** @var boolean */ | ||
| private static $isPhalcon2; | ||
|
|
||
| /** | ||
| * @param RelationInterface | ||
| * @param null|callable $constraints | ||
| * @param Loader|EagerLoad $parent | ||
| */ | ||
| public function __construct(Relation $relation, $constraints, $parent) | ||
| { | ||
| if (static::$isPhalcon2 === null) { | ||
| static::$isPhalcon2 = version_compare(\Phalcon\Version::get(), '2.0.0') >= 0; | ||
| } | ||
|
|
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| $this->relation = $relation; | ||
| $this->constraints = is_callable($constraints) ? $constraints : null; | ||
| $this->parent = $parent; | ||
| } | ||
|
|
||
| /** | ||
| * @return null|Phalcon\Mvc\ModelInterface[] | ||
| */ | ||
| public function getSubject() | ||
| { | ||
| return $this->subject; | ||
| } | ||
|
|
||
| /** | ||
| * Executes each db query needed | ||
| * | ||
| * Note: The {$alias} property is set two times because Phalcon Model ignores | ||
| * empty arrays when overloading property set. | ||
| * | ||
| * Also {@see https://github.com/stibiumz/phalcon.eager-loading/issues/1} | ||
| * | ||
| * @return $this | ||
| */ | ||
| public function load() | ||
| { | ||
| $relation = $this->relation; | ||
|
|
||
| $alias = $relation->getOptions(); | ||
| $alias = strtolower($alias['alias']); | ||
| $relField = $relation->getFields(); | ||
| $relReferencedModel = $relation->getReferencedModel(); | ||
| $relReferencedField = $relation->getReferencedFields(); | ||
| $relIrModel = $relation->getIntermediateModel(); | ||
| $relIrField = $relation->getIntermediateFields(); | ||
| $relIrReferencedField = $relation->getIntermediateReferencedFields(); | ||
|
|
||
| // PHQL has problems with this slash | ||
| if ($relReferencedModel[0] === '\\') { | ||
| $relReferencedModel = ltrim($relReferencedModel, '\\'); | ||
| } | ||
|
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| $bindValues = array (); | ||
|
|
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| foreach ($this->parent->getSubject() as $record) { | ||
| $bindValues[$record->readAttribute($relField)] = true; | ||
| } | ||
|
|
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| $bindValues = array_keys($bindValues); | ||
|
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| $subjectSize = count($this->parent->getSubject()); | ||
| $isManyToManyForMany = false; | ||
|
|
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| $builder = new QueryBuilder; | ||
| $builder->from($relReferencedModel); | ||
|
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||
| if ($isThrough = $relation->isThrough()) { | ||
| if ($subjectSize === 1) { | ||
| // The query is for a single model | ||
| $builder | ||
| ->innerJoin( | ||
| $relIrModel, | ||
| sprintf( | ||
| '[%s].[%s] = [%s].[%s]', | ||
| $relIrModel, | ||
| $relIrReferencedField, | ||
| $relReferencedModel, | ||
| $relReferencedField | ||
| ) | ||
| ) | ||
| ->inWhere("[{$relIrModel}].[{$relIrField}]", $bindValues) | ||
| ; | ||
| } else { | ||
| // The query is for many models, so it's needed to execute an | ||
| // extra query | ||
| $isManyToManyForMany = true; | ||
|
|
||
| $relIrValues = new QueryBuilder; | ||
| $relIrValues = $relIrValues | ||
| ->from($relIrModel) | ||
| ->inWhere("[{$relIrModel}].[{$relIrField}]", $bindValues) | ||
| ->getQuery() | ||
| ->execute() | ||
| ->setHydrateMode(Resultset::HYDRATE_ARRAYS) | ||
| ; | ||
|
|
||
| $bindValues = $modelReferencedModelValues = array (); | ||
|
|
||
| foreach ($relIrValues as $row) { | ||
| $bindValues[$row[$relIrReferencedField]] = true; | ||
| $modelReferencedModelValues[$row[$relIrField]][$row[$relIrReferencedField]] = true; | ||
| } | ||
|
|
||
| unset ($relIrValues, $row); | ||
|
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| $builder->inWhere("[{$relReferencedField}]", array_keys($bindValues)); | ||
| } | ||
| } else { | ||
| $builder->inWhere("[{$relReferencedField}]", $bindValues); | ||
| } | ||
|
|
||
| if ($this->constraints) { | ||
| call_user_func($this->constraints, $builder); | ||
| } | ||
|
|
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| $records = array (); | ||
|
|
||
| if ($isManyToManyForMany) { | ||
| foreach ($builder->getQuery()->execute() as $record) { | ||
| $records[$record->readAttribute($relReferencedField)] = $record; | ||
| } | ||
|
|
||
| foreach ($this->parent->getSubject() as $record) { | ||
| $referencedFieldValue = $record->readAttribute($relField); | ||
|
|
||
| if (isset ($modelReferencedModelValues[$referencedFieldValue])) { | ||
| $referencedModels = array (); | ||
|
|
||
| foreach ($modelReferencedModelValues[$referencedFieldValue] as $idx => $_) { | ||
| $referencedModels[] = $records[$idx]; | ||
| } | ||
|
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| $record->{$alias} = $referencedModels; | ||
|
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| if (static::$isPhalcon2) { | ||
| $record->{$alias} = null; | ||
| $record->{$alias} = $referencedModels; | ||
| } | ||
| } else { | ||
| $record->{$alias} = null; | ||
| $record->{$alias} = array (); | ||
| } | ||
| } | ||
|
|
||
| $records = array_values($records); | ||
| } else { | ||
| // We expect a single object or a set of it | ||
| $isSingle = !$isThrough && ( | ||
| $relation->getType() === Relation::HAS_ONE || | ||
| $relation->getType() === Relation::BELONGS_TO | ||
| ); | ||
|
|
||
| if ($subjectSize === 1) { | ||
| // Keep all records in memory | ||
| foreach ($builder->getQuery()->execute() as $record) { | ||
| $records[] = $record; | ||
| } | ||
|
|
||
| $record = $this->parent->getSubject(); | ||
| $record = $record[0]; | ||
|
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| if ($isSingle) { | ||
| $record->{$alias} = empty ($records) ? null : $records[0]; | ||
| } else { | ||
| if (empty ($records)) { | ||
| $record->{$alias} = null; | ||
| $record->{$alias} = array (); | ||
| } else { | ||
| $record->{$alias} = $records; | ||
|
|
||
| if (static::$isPhalcon2) { | ||
| $record->{$alias} = null; | ||
| $record->{$alias} = $records; | ||
| } | ||
| } | ||
| } | ||
| } else { | ||
| $indexedRecords = array (); | ||
|
|
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| // Keep all records in memory | ||
| foreach ($builder->getQuery()->execute() as $record) { | ||
| $records[] = $record; | ||
|
|
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| if ($isSingle) { | ||
| $indexedRecords[$record->readAttribute($relReferencedField)] = $record; | ||
| } else { | ||
| $indexedRecords[$record->readAttribute($relReferencedField)][] = $record; | ||
| } | ||
| } | ||
|
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| foreach ($this->parent->getSubject() as $record) { | ||
| $referencedFieldValue = $record->readAttribute($relField); | ||
|
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| if (isset ($indexedRecords[$referencedFieldValue])) { | ||
| $record->{$alias} = $indexedRecords[$referencedFieldValue]; | ||
|
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| if (static::$isPhalcon2 && is_array($indexedRecords[$referencedFieldValue])) { | ||
| $record->{$alias} = null; | ||
| $record->{$alias} = $indexedRecords[$referencedFieldValue]; | ||
| } | ||
| } else { | ||
| $record->{$alias} = null; | ||
|
|
||
| if (!$isSingle) { | ||
| $record->{$alias} = array (); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
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| $this->subject = $records; | ||
|
|
||
| return $this; | ||
| } | ||
| } |
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