laravel 中是否有急切的“插入”选项用于多对多附加？

Question

Is there a way to reduce many Insert queries to 1 when using Laravel's attach function in ManyToMany relationship?

Here is my code:

$itemIds = Item::pluck('id');

$sale = Sale::create();

foreach ($itemIds as $id) {
    $sale->items()->attach($id);
}

But this way it makes as many queries as items found in the database.

Answer 1

Attaching / Detaching

For convenience, attach and detach also accept arrays of IDs as input.

For example:

$user = User::find(1);
 
$user->roles()->attach([1, 2, 3]);

In your code, you have to use $itemIds as array of Item Id.

$itemIds = Item::pluck('id');

$sale = Sale::create();

$sale->items()->attach($itemIds);