My schedule command deletes all my records - sql

Question

I have a table called offers and this is how I store in my controller:
$offer = Offer::Create([
'user_id' => Auth::id(),
'property_id' => $request->property_id,
'offer_price' => $request->offer_price,
'offer_period' => $request->offer_period,
'offer_message' => $request->offer_message,
'cash_amount' => $request->cash_amount,
'buyer_type' => $request->buyer_type,
'expires_at' => now()->addMinutes($request->offer_period),
]);
I want to delete all the offers where the expires_at is older than the updated_at date. I am using the timestamps.
This is what I have in my kernel:
$schedule->call(function () {
Offer::where('updated_at', '>', 'expires_at' )->delete();
})->everyMinute();
When I ran the command:
php artisan schedule:run
I noticed that all the offers were deleted from my database.
I ran the command at 11:22, and even the rows that were meant to expire at 11:30 were deleted.
Is there anything that I possibly did wrong?

Answer 1

Instead of:
Offer::where('updated_at', '>', 'expires_at' )->delete();
you should use:
Offer::whereColumn('updated_at', '>', 'expires_at' )->delete();
Initially you used simple where. Laravel doesn't know that expires_at is here column name so where would be something like this:
SELECT * FROM offers where updated_at > 'expires_at'
And using second method Laravel will generate:
SELECT * FROM offers where updated_at > expires_at
without quotes (ant this is what you need here).
Instead of second method you can also use DB::raw construction like this:
Offer::where('updated_at', '>', \DB::raw('expires_at'))->delete();