Laravel 5.3雄辩的更新或创建

Question

try {
     \DB::beginTransaction();
      Model::updateOrCreate( ['id' => $id, 'number' => $number],
          ['value' => $request->get('value')]
      );
            \DB::commit();
     } catch (\Exception $e) {
            \DB::rollBack();
            throw new \Exception($e->error());
     }

I was working on a task to create a common trait to prevent a record to be updated by multiple users at the same time. And, my method was to put hidden input of $data->updated_at in a blade and then to check it when an update request is sent. And there are some cases Laravel's updateOrCreate is used to update or create a new record. And, I don't know how to deal with that. Should, I split the methods to create and update or is there any good way to deal with it?

Answer 1

You probably want to separate what you are doing.

I was playing around and came up with this for fun (haven't tested):

Illuminate\Database\Eloquent\Builder::macro('createOrUpdateWhen', function ($attributes = [], $values = [], $when = null) {
    $m = $this->firstOrNew($attributes);

    if (is_array($when)) {
        $when = function ($m) use ($when) {
            foreach ($when as $key => $value) {
                if ($m->$key != $value) {
                    return false;
                }
            }

            return true;
        }
    }

    if (! $m->exists || $when($m)) {
        $m->fill($values);
    }

    $m->save();

    return $m;
});

$m = M::createOrUpdateWhen($attributes, $values, function ($m) use ($request) {
    return $m->updated_at == $request->input('updated_at');
});

$m = M::createOrUpdateWhen(
    $attributes, $values, ['updated_at' => $request->input('updated_at')]
);

:-}

Answer 2

    $post = Model::where([['id', $id], ['number', $number]])->first();
    try {
        \DB::beginTransaction();
        if (is_null($post)) {
            Model::create($input);
        } else {
            $post->updateWithExclLock($request->get('updated_at'), $input]);
        }