On subscription renewal processing the number of installments is hardcoded = 1

[jffaria]

The Subscription class registers a function hook to process the payment of renewal orders, and in that function it calls a method that populates the fields to create the Pagar.me order via the API. This method sets the installments field to 1:

woocommerce/src/Model/Subscription.php

Line 294 in b83ca39

$fields['installments'] = 1;

The behavior I expected was to use the same number of installments than in the parent order or previous renewal order, or that the customer might be able to choose the number of installments in the subscription details in their "my account" page.

[jffaria]

I am working around this by changing the line to apply a filter:

$fields['installments'] = apply_filters( 'custom_subscription_renewal_installments', 1 );

Then I can implement the logic in the filter in a separate plugin file or snippet.