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<?php |
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/** |
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* Related data merging |
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* User: moyo |
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* Date: 26/12/2017 |
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* Time: 10:33 AM |
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*/ |
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namespace Carno\Database\SQL\Merging; |
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use Carno\Database\SQL\Builder; |
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use Carno\Database\SQL\Exception\RelatedMergingFailedException; |
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use Closure; |
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trait Related |
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{ |
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/** |
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* similar with "relations" but merge single-data in source |
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* @param string $table |
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* @param string $bindKey |
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* @param string $srcKey |
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* @param Closure $userExe |
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* @return Builder |
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*/ |
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public function relation( |
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string $table, |
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string $bindKey, |
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string $srcKey = 'id', |
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Closure $userExe = null |
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) : Builder { |
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$this->rsRender($table, $bindKey, $srcKey, null, $userExe); |
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return $this; |
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} |
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/** |
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* similar with "relation" but attach listed-data in source |
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* @param string $table |
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* @param string $bindKey |
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* @param string $listKey |
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* @param string $srcKey |
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* @param Closure $userExe |
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* @return Builder |
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*/ |
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public function relations( |
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string $table, |
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string $bindKey, |
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string $listKey, |
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string $srcKey = 'id', |
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Closure $userExe = null |
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) : Builder { |
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$this->rsRender($table, $bindKey, $srcKey, $listKey, $userExe); |
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return $this; |
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} |
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/** |
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* @param string $table |
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* @param string $bindKey |
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* @param string $srcKey |
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* @param string $listedAs |
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* @param Closure $userExe |
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*/ |
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private function rsRender( |
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string $table, |
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string $bindKey, |
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string $srcKey, |
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string $listedAs = null, |
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Closure $userExe = null |
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) : void { |
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$this->rsWatching(function (array $rows) use ($table, $bindKey, $srcKey, $listedAs, $userExe) { |
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$srcIds = []; |
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array_walk($rows, function (array $row) use ($srcKey, &$srcIds) { |
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if (isset($row[$srcKey])) { |
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$srcIds[] = $row[$srcKey]; |
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} |
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}); |
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if (empty($srcIds)) { |
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throw new RelatedMergingFailedException('Empty source identifies'); |
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} |
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/** |
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* @var Builder $builder |
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*/ |
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$builder = $this->new($table); |
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if ($userExe) { |
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$userExe($builder); |
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} |
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$related = yield $builder->where($bindKey, 'in', $srcIds)->list(); |
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$stack = []; |
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foreach ($related as $row) { |
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$stack[$row[$bindKey]][] = $row; |
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} |
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// merge single-data or attach listed-data |
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foreach ($rows as $i => $row) { |
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if ($listedAs) { |
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$rows[$i][$listedAs] = $stack[$row[$srcKey]] ?? []; |
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} else { |
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$rows[$i] = array_merge(current($stack[$row[$srcKey]] ?? []) ?: [], $row); |
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} |
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} |
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return $rows; |
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}); |
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} |
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} |
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carno-php /
mysql
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