Call to undefined method Laravel\\Cashier\\SubscriptionBuilder::applyCoupon()

[sts-ryan-holton]

Cashier Stripe Version

16.0.2

Laravel Version

12.34.0

PHP Version

8.4

Database Driver & Version

MySQL 8

Description

After upgrading to Cashier v16, attempting to apply a coupon to my user's subscription is throwing an error. This worked in v15.

The error is thrown:

Call to undefined method Laravel\\Cashier\\SubscriptionBuilder::applyCoupon()

Steps To Reproduce

Attempt to use applyCoupon method on subscription:

$subscriptionOptions = [
    'success_url' => "$frontendURL".$request->input('success_url', 'account/billing/checkout/success/'),
    'cancel_url' => "$frontendURL".$request->input('cancel_url', 'account/billing/plans/'),
];

$user = User::find(Auth::id());
$subscription = $user->newSubscription('default', $plan->stripe_id);

if (Str::of($request->input('plan', ''))->contains(['monthly-75', 'yearly-75'])) {
    if (config('domain-monitor.new_customers_discount')) {
        $subscription = $subscription->applyCoupon(config('domain-monitor.new_customers_discount'));
    }
}

$subscription = $subscription->checkout($subscriptionOptions);

[crynobone]

Can you share where exactly applyCoupon method exists in SubscriptionBuilder on v15?

[sts-ryan-holton]

@crynobone It works in v15 though? What's missing?

I've jut checked out back to my original branch running Cashier v15.7.1 (Stripe v16.6.0) and the coupon via applyCoupon has been applied successfully and I've been redirected to the Stripe dashboard with that coupon:

Without any changes other than switching to the new cashier version, it breaks and throws that error.

The SubscriptionBuilder class in both v15 and v16 utilises your AllowsCoupons trait.

[sts-ryan-holton]

Apologies, this was a copy & paste issue, it's withCoupon that I needed