Fixed checkout failures when collecting tax IDs

[alexreiling]

Summary

• allowed Stripe Checkout to update existing customer names when automatic tax customer updates are enabled
• tightened Stripe API tests around customer_update for subscription, donation, and gift checkout sessions

Testing

• pnpm test:single test/unit/server/services/stripe/stripe-api.test.js

[coderabbitai]

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ℹ️ Recent review info

⚙️ Run configuration

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Review profile: CHILL

Plan: Pro

Run ID: 33d02163-84ff-43a8-90f5-6a2b1cbf55b4

📥 Commits

Reviewing files that changed from the base of the PR and between cd4f5fd and 009142c.

📒 Files selected for processing (2)

• ghost/core/core/server/services/stripe/stripe-api.js
• ghost/core/test/unit/server/services/stripe/stripe-api.test.js

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Walkthrough

This change modifies StripeAPI's checkout session creation logic so that when automatic tax is enabled and a customer is present, the customer_update payload includes both address: 'auto' and name: 'auto', previously only setting address: 'auto'. This applies to the checkout subscription, donation payment, and gift subscription session creation methods. Corresponding unit tests were updated to assert the exact customer_update shape, and a new test was added covering the donation checkout session scenario.

Changes

Cohort / File(s)	Change Summary
Stripe customer_update name auto field: stripe-api.js	Added name: 'auto' to customer_update payload in three checkout session creation methods (subscription, donation, gift) when automatic tax is enabled and customer is present
Stripe customer_update name auto field: stripe-api.test.js	Updated existing test assertions to check exact customer_update shape; added new test for donation checkout session

Sequence Diagram(s)

sequenceDiagram
  participant Caller
  participant StripeAPI
  participant Stripe

  Caller->>StripeAPI: createCheckoutSession/createDonationCheckoutSession/createGiftCheckoutSession
  alt automatic tax enabled and customer present
    StripeAPI->>StripeAPI: set customer_update = {address: 'auto', name: 'auto'}
  end
  StripeAPI->>Stripe: create session with stripeSessionOptions
  Stripe-->>StripeAPI: session response
  StripeAPI-->>Caller: session

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Related issues: None specified.

Related PRs: None specified.

Suggested labels: stripe, bug-fix

Suggested reviewers: None specified.

🚀 A tiny tweak in Stripe's own hand,
Now names auto-update, as customers demand.
Address and name, together they go,
Checkout, donation, and gift all in flow.
Tests confirm it, exact and precise —
A small fix delivered, clean and nice.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title matches the main change: fixing Stripe Checkout failures related to tax ID collection and customer updates.
Description check	✅ Passed	The description accurately summarizes the Stripe Checkout/customer_update changes and the related test updates.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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