使用 chunkById 方法的时候请不要进行排序

Student::query()
    ->where('is_delete', false)
    ->orderBy('id', 'DESC')
    ->chunkById(200, function($students) {
            // 在这里进行逻辑处理
    });Copy

    public function chunkById($count, callable $callback, $column = null, $alias = null)
    {
        $column = is_null($column) ? $this->getModel()->getKeyName() : $column;

        $alias = is_null($alias) ? $column : $alias;

        $lastId = null;

        do {
            $clone = clone $this;


            $results = $clone->forPageAfterId($count, $lastId, $column)->get();

            $countResults = $results->count();

            if ($countResults == 0) {
                break;
            }


            if ($callback($results) === false) {
                return false;
            }

            $lastId = $results->last()->{$alias};

            unset($results);


        } while ($countResults == $count);

        return true;
    }Copy

public function forPageAfterId($perPage = 15, $lastId = 0, $column = 'id')
{
    $this->orders = $this->removeExistingOrdersFor($column);

    if (! is_null($lastId)) {
        $this->where($column, '>', $lastId);
    }

    return $this->orderBy($column, 'asc')
                ->take($perPage);
}Copy

Student::query()
    ->where('is_delete', false)
    ->chunkById(200, function($students) {
            // 在这里进行逻辑处理
    });Copy