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<?php |
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namespace Staudenmeir\EloquentHasManyDeep; |
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use Illuminate\Database\Eloquent\Model; |
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use Illuminate\Database\Eloquent\Relations\Pivot; |
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use Illuminate\Support\Str; |
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trait RetrievesIntermediateTables |
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{ |
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/** |
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* The intermediate tables to retrieve. |
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* |
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* @var array |
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*/ |
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protected $intermediateTables = []; |
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/** |
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* Set the columns on an intermediate table to retrieve. |
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* |
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* @param string $class |
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* @param array $columns |
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* @param string|null $accessor |
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* @return $this |
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*/ |
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public function withIntermediate($class, array $columns = ['*'], $accessor = null) |
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{ |
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$table = (new $class)->getTable(); |
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$accessor = $accessor ?: snake_case(class_basename($class)); |
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return $this->withPivot($table, $columns, $class, $accessor); |
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} |
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/** |
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* Set the columns on a pivot table to retrieve. |
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* |
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* @param string $table |
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* @param array $columns |
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* @param string $class |
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* @param string|null $accessor |
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* @return $this |
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*/ |
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public function withPivot($table, array $columns = ['*'], $class = Pivot::class, $accessor = null) |
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{ |
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if ($columns === ['*']) { |
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$columns = $this->query->getConnection()->getSchemaBuilder()->getColumnListing($table); |
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} |
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$accessor = $accessor ?: $table; |
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if (isset($this->intermediateTables[$accessor])) { |
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$columns = array_merge($columns, $this->intermediateTables[$accessor]['columns']); |
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} |
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$this->intermediateTables[$accessor] = compact('table', 'columns', 'class'); |
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return $this; |
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} |
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/** |
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* Get the intermediate columns for the relation. |
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* |
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* @return array |
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*/ |
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protected function intermediateColumns() |
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{ |
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$columns = []; |
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foreach ($this->intermediateTables as $accessor => $intermediateTable) { |
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$prefix = $this->prefix($accessor); |
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foreach ($intermediateTable['columns'] as $column) { |
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$columns[] = $intermediateTable['table'].'.'.$column.' as '.$prefix.$column; |
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} |
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} |
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return array_unique($columns); |
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} |
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/** |
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* Hydrate the intermediate table relationship on the models. |
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* |
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* @param array $models |
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* @return void |
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*/ |
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protected function hydrateIntermediateRelations(array $models) |
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{ |
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$intermediateTables = $this->intermediateTables; |
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ksort($intermediateTables); |
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foreach ($intermediateTables as $accessor => $intermediateTable) { |
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$prefix = $this->prefix($accessor); |
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if (Str::contains($accessor, '.')) { |
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list($path, $key) = preg_split('/\.(?=[^.]*$)/', $accessor); |
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} else { |
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list($path, $key) = [null, $accessor]; |
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} |
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foreach ($models as $model) { |
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$relation = $this->intermediateRelation($model, $intermediateTable, $prefix); |
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data_get($model, $path)->setRelation($key, $relation); |
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} |
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} |
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} |
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/** |
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* Get the intermediate relationship from the query. |
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* |
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* @param \Illuminate\Database\Eloquent\Model $model |
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* @param array $intermediateTable |
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* @param string $prefix |
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* @return \Illuminate\Database\Eloquent\Model |
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*/ |
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protected function intermediateRelation(Model $model, array $intermediateTable, $prefix) |
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{ |
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$attributes = $this->intermediateAttributes($model, $prefix); |
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$class = $intermediateTable['class']; |
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if ($class === Pivot::class) { |
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return $class::fromAttributes($model, $attributes, $intermediateTable['table'], true); |
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} |
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if (is_subclass_of($class, Pivot::class)) { |
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return $class::fromRawAttributes($model, $attributes, $intermediateTable['table'], true); |
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} |
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return (new $class)->newFromBuilder($attributes); |
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} |
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/** |
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* Get the intermediate attributes from a model. |
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* |
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* @param \Illuminate\Database\Eloquent\Model $model |
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* @param string $prefix |
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* @return array |
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*/ |
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protected function intermediateAttributes(Model $model, $prefix) |
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{ |
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$attributes = []; |
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foreach ($model->getAttributes() as $key => $value) { |
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if (strpos($key, $prefix) === 0) { |
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$attributes[substr($key, strlen($prefix))] = $value; |
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unset($model->$key); |
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} |
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} |
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return $attributes; |
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} |
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/** |
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* Get the intermediate column alias prefix. |
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* |
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* @param string $accessor |
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* @return string |
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*/ |
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protected function prefix($accessor) |
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{ |
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return '__'.$accessor.'__'; |
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} |
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} |
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staudenmeir /
eloquent-has-many-deep
