[miniflare] Fix mixed kvNamespaces and d1Databases records

[petebacondarwin]

Fixes the same schema validation bug as was fixed for r2Buckets — kvNamespaces and d1Databases bindings could not mix plain string values and object values in the same record.

Previously, passing a config like:

new Miniflare({
  kvNamespaces: {
    LOCAL_NS: "local-ns",
    REMOTE_NS: { id: "remote-ns", remoteProxyConnectionString: ... },
  },
})

would throw a Zod validation error because the schema used two separate z.record(...) union branches — one accepting only strings, one accepting only objects. Zod would fail both branches when the values were mixed.

The fix collapses the two z.record(...) branches into a single z.record(z.union([z.string(), z.object({...})])), matching the pattern already applied to r2Buckets. The namespaceEntries() helper in plugins/shared already handled mixed values correctly at runtime — only the schema validation was too restrictive.

---

• Tests
  • Tests included/updated
  • Automated tests not possible - manual testing has been completed as follows:
  • Additional testing not necessary because:
• Public documentation
  • Cloudflare docs PR(s):
  • Documentation not necessary because: this is a bug fix for an internal schema validation constraint; no public API surface changed

A picture of a cute animal (not mandatory, but encouraged)

---

[workers-devprod]

Codeowners approval required for this PR:

• ✅ @cloudflare/wrangler

Show detailed file reviewers

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 1 additional finding.

[changeset-bot]

🦋 Changeset detected

Latest commit: 876f943

The changes in this PR will be included in the next version bump.

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions]

✅ All changesets look good

[pkg-pr-new]

create-cloudflare

npm i https://pkg.pr.new/create-cloudflare@12986

@cloudflare/kv-asset-handler

npm i https://pkg.pr.new/@cloudflare/kv-asset-handler@12986

miniflare

npm i https://pkg.pr.new/miniflare@12986

@cloudflare/pages-shared

npm i https://pkg.pr.new/@cloudflare/pages-shared@12986

@cloudflare/unenv-preset

npm i https://pkg.pr.new/@cloudflare/unenv-preset@12986

@cloudflare/vite-plugin

npm i https://pkg.pr.new/@cloudflare/vite-plugin@12986

@cloudflare/vitest-pool-workers

npm i https://pkg.pr.new/@cloudflare/vitest-pool-workers@12986

@cloudflare/workers-editor-shared

npm i https://pkg.pr.new/@cloudflare/workers-editor-shared@12986

wrangler

npm i https://pkg.pr.new/wrangler@12986

commit: 876f943