[Bug]: Create Regions form does not warn when Payment Provider is Empty

[SalahAdDin]

Package.json file

{
  "name": "@dtc/backend",
  "version": "0.0.1",
  "description": "A starter for Medusa projects.",
  "author": "Medusa (https://medusajs.com)",
  "license": "MIT",
  "keywords": [
    "sqlite",
    "postgres",
    "typescript",
    "ecommerce",
    "headless",
    "medusa"
  ],
  "scripts": {
    "build": "medusa build",
    "start": "medusa start",
    "dev": "medusa develop",
    "lint": "medusa lint",
    "test:integration:http": "TEST_TYPE=integration:http NODE_OPTIONS=--experimental-vm-modules jest --silent=false --runInBand --forceExit",
    "test:integration:modules": "TEST_TYPE=integration:modules NODE_OPTIONS=--experimental-vm-modules jest --silent=false --runInBand --forceExit",
    "test:unit": "TEST_TYPE=unit NODE_OPTIONS=--experimental-vm-modules jest --silent --runInBand --forceExit"
  },
  "dependencies": {
    "@hookform/resolvers": "5.5.7",
    "@medusajs/admin-sdk": "2.18.0",
    "@medusajs/admin-shared": "2.18.0",
    "@medusajs/caching": "2.18.0",
    "@medusajs/cli": "2.18.0",
    "@medusajs/dashboard": "2.18.0",
    "@medusajs/draft-order": "2.18.0",
    "@medusajs/framework": "2.18.0",
    "@medusajs/icons": "2.18.0",
    "@medusajs/js-sdk": "2.18.0",
    "@medusajs/medusa": "2.18.0",
    "@medusajs/ui": "4.2.0",
    "@tanstack/react-query": "5.64.2",
    "@tanstack/react-table": "8.20.5",
    "@uiw/react-json-view": "2.0.0-alpha.43",
    "@vicacha-devs/medusa-plugin-b2b": "file:../../../plugins/packages/b2b",
    "@vicacha-devs/medusa-shared-admin": "file:../../../plugins/packages/shared",
    "airport-data-js": "3.1.0",
    "react-hook-form": "7.85.0",
    "react-i18next": "13.5.0",
    "react-router-dom": "6.30.4",
    "zod": "4.2.0"
  },
  "devDependencies": {
    "@medusajs/test-utils": "2.18.0",
    "@swc/core": "^1.7.28",
    "@swc/jest": "^0.2.36",
    "@types/jest": "^29.5.13",
    "@types/node": "^20.12.11",
    "@types/react": "^18.3.2",
    "@types/react-dom": "^18.2.25",
    "jest": "^29.7.0",
    "prop-types": "^15.8.1",
    "react": "^18.3.1",
    "react-dom": "^18.3.1",
    "ts-node": "^10.9.2",
    "typescript": "^5.6.2",
    "vite": "^5.4.14"
  },
  "engines": {
    "node": ">=25"
  }
}

Node.js version

v25.9.0

Database and its version

PostgreSQL 16

Operating system name and version

Deepin25

Browser name

Firefox

What happended?

We need to create a new region for the Caribbean and Antilles. We filled in the required fields, and we clicked Save.

Nothing happened- not a Toast, not an error message, nothing.

We checked the console and network, and we understood what happened: Payment Provider cannot be empty.

Expected behavior

Show it either in a toast or in an error message.

Actual behavior

Nothing happened- not a Toast, not an error message, nothing.

A console error:

Uncaught (in promise) ZodError
    at chunk-UEC35S4B.js?v=91804e29:94:82
    at Object.resolver (chunk-UEC35S4B.js?v=91804e29:101:8)
    at _executeSchema (chunk-B24BWTZQ.js?v=91804e29:1153:51)
    at chunk-B24BWTZQ.js?v=91804e29:1522:40
    at handleSubmit (chunk-LFLN6I6Y.js?v=91804e29:17:33)
    at HTMLUnknownElement.callCallback2 (chunk-U3XUIKGL.js?v=91804e29:3674:22)
    at Object.invokeGuardedCallbackDev (chunk-U3XUIKGL.js?v=91804e29:3699:24)
    at invokeGuardedCallback (chunk-U3XUIKGL.js?v=91804e29:3733:39)
    at invokeGuardedCallbackAndCatchFirstError (chunk-U3XUIKGL.js?v=91804e29:3736:33)
    at executeDispatch (chunk-U3XUIKGL.js?v=91804e29:7014:11) 

Link to reproduction repo

https://github.com/Vicacha-Devs/vicacha-travels

[medusa-os-bot]

Thanks for reporting this! We've labeled it as a bug and will investigate.

When creating a region in the admin dashboard, submitting the form with no payment provider selected produces no visible feedback — no toast, no inline error message. The Zod schema requires at least one payment provider (payment_providers: zod.array(zod.string()).min(1)), but the resolver throws an uncaught ZodError instead of setting field-level errors. The Form.ErrorMessage for the payment_providers field (create-region-form.tsx line 434) is present but never populated. Additionally, form.handleSubmit is called without an onInvalid callback, so there is no fallback toast on validation failure either. The fix likely involves adding an onInvalid handler to show a toast error when validation fails, and/or investigating why the zodResolver is not correctly returning field errors for the payment_providers array field.

[NikhilDhillon]

Noticed #16718 landed just before this one with the same core fix — happy to defer to whichever is more useful. Two differences worth flagging: #16720 also covers the name field, which has the same problem one line above, and includes a changeset.

[SalahAdDin]

@guillaume-flambard, how is it going on?