Laravel 批量添加删除都可以操作,唯独批量更新比较闹心,foreach循环的话比较耗费资源,这里分享个批量更新的原生的sql方法,随拿随用。
/***
* 批量更新操作
* @param string $table_name 表名字
* @param array $multiple_data 更新数据,第一个字段为条件
* @return false|int
*/
public function updateBatch($table_name, $multiple_data = [])
{
$chunk_result = array_chunk($multiple_data, 1000);
$return = false;
foreach ($chunk_result as $key => $multiple_data) {
try {
$firstRow = current($multiple_data);
$updateColumn = array_keys($firstRow);
// 以第一个字段为条件
$referenceColumn = current($updateColumn);
unset($updateColumn[0]);
// 拼接sql语句
$updateSql = "UPDATE " . $table_name . " SET ";
$sets = [];
$bindings = [];
foreach ($updateColumn as $uColumn) {
$setSql = "`" . $uColumn . "` = CASE ";
foreach ($multiple_data as $data) {
$setSql .= "WHEN `" . $referenceColumn . "` = ? THEN ? ";
$bindings[] = $data[$referenceColumn];
$bindings[] = $data[$uColumn];
}
$setSql .= "ELSE `" . $uColumn . "` END ";
$sets[] = $setSql;
}
$updateSql .= implode(', ', $sets);
unset($sets);
$whereIn = collect($multiple_data)->pluck($referenceColumn)->values()->all();
$bindings = array_merge($bindings, $whereIn);
$whereIn = rtrim(str_repeat('?,', count($whereIn)), ',');
$updateSql = rtrim($updateSql, ", ") . " WHERE `" . $referenceColumn . "` IN (" . $whereIn . ")";
// 传入预处理sql语句和对应绑定数据
$return = DB::update($updateSql, $bindings);
} catch (\Exception $e) {
return false;
}
unset($updateSql, $bindings);
unset($chunk_result[$key]);
}
return $return;
}
当然有些涉及到批量修改的,也可以简单粗暴直接全部相关数据删除重新添加,但是这样的简单粗暴只是适用于数据量较小的修改。
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