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<?php |
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namespace Shomisha\UnusualRelationships\Relationships; |
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use Illuminate\Database\Eloquent\Model; |
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use Illuminate\Database\Eloquent\Builder; |
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use Illuminate\Database\Eloquent\Relations\HasMany; |
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class BelongsToManyThrough extends HasMany |
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{ |
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/** @var Model */ |
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protected $through; |
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/** @var string */ |
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protected $foreignOnThrough; |
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/** @var string */ |
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protected $pivotTable; |
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/** @var string */ |
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protected $relatedForeign; |
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/** @var string */ |
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protected $throughForeign; |
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public function __construct( |
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Builder $query, |
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Model $parent, |
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Model $related, |
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Model $through, |
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string $foreignOnThrough, |
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string $pivotTable, |
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string $relatedForeign, |
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string $throughForeign |
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) { |
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$this->through = $through; |
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$this->related = $related; |
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$this->foreignOnThrough = $foreignOnThrough; |
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$this->pivotTable = $pivotTable; |
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$this->relatedForeign = $relatedForeign; |
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$this->throughForeign = $throughForeign; |
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parent::__construct($query, $parent, $foreignOnThrough, $parent->getKeyName()); |
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} |
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/** |
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* Constrain the query. |
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*/ |
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public function addConstraints() |
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{ |
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$relatedTable = $this->related->getTable(); |
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$relatedKey = $this->related->getKeyName(); |
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$throughTable = $this->through->getTable(); |
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$throughKey = $this->through->getKeyName(); |
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$this->query->select([ |
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"{$relatedTable}.*", |
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"{$throughTable}.{$this->foreignOnThrough}", |
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]); |
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$this->query->join("{$this->pivotTable} as pivot_table", "pivot_table.{$this->relatedForeign}", '=', "{$relatedTable}.{$relatedKey}"); |
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$this->query->join("{$throughTable}", "{$throughTable}.{$throughKey}", '=', "pivot_table.{$this->throughForeign}"); |
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$this->query->distinct(); |
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if (static::$constraints) { |
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$this->query->where("{$throughTable}.{$this->foreignOnThrough}", $this->getParentKey()); |
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} |
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} |
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/** |
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* Constrain the query for multiple models. |
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* |
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* @param array $models |
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*/ |
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public function addEagerConstraints(array $models) |
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{ |
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$keys = collect($models)->map(function (Model $model) { |
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return $model->getKey(); |
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}); |
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$throughTable = $this->through->getTable(); |
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$this->query->whereIn("{$throughTable}.{$this->foreignOnThrough}", $keys); |
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} |
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} |
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shomisha /
unusual-relationships
