🐛 BUG: service core:user:__WRANGLER_EXTERNAL_DURABLE_OBJECTS_WORKER: Worker refers to a service "core:user:worker", but no such service is defined.

[flashblaze]

Which Cloudflare product(s) does this pertain to?

Miniflare

What versions are you using?

3.99.0 [wrangler], 4.20241230.0, [@cloudflare/workers-types]

What operating system and version are you using?

WSL Ubuntu

Please provide a link to a minimal reproduction

No response

Describe the Bug

I'm using Nuxt with Workers Static Assets. When I deploy my app, Durable Objects work. However, it does not work in dev server.

wrangler.toml

#:schema node_modules/wrangler/config-schema.json
name = "dummy-worker"
main = "./worker-entry.mjs"
compatibility_date = "2025-01-04"
compatibility_flags = ["nodejs_compat"]
assets = { directory = "./.output/public/", binding = "ASSETS" }

[observability]
enabled = true

[vars]
NODE_VERSION = "20.17.0"
PNPM_VERSION = "9.12.3"

[[durable_objects.bindings]]
name = "DUMMY_OBJECT"
class_name = "DummyDurableObject"

[[migrations]]
tag = "v1"
new_classes = ["MyDurableObject"]

[[migrations]]
tag = "v2"
renamed_classes = [
    { from = "MyDurableObject", to = "DummyDurableObject" },
]

worker-entry.mjs

// worker-entry.mjs
export { default } from './.output/server/index.mjs';
export { DummyDurableObject} from './functions/durable.ts';

worker-configuration.d.ts

// Generated by Wrangler by running `wrangler types`

interface Env {
	NODE_VERSION: "20.17.0";
	PNPM_VERSION: "9.12.3";
	DUMMY_OBJECT: DurableObjectNamespace<import("./worker-entry").DummyDurableObject>;
	ASSETS: Fetcher;
}

package,json

{
  "name": "dummy-worker",
  "private": true,
  "type": "module",
  "scripts": {
    "build": "nuxt build",
    "dev": "nuxt dev",
    "generate": "nuxt generate",
    "preview": "pnpm run build && wrangler dev",
    "postinstall": "nuxt prepare",
    "lint": "eslint .",
    "lint:fix": "eslint . --fix",
    "deploy": "pnpm run build && wrangler deploy",
    "cf-typegen": "wrangler types"
  },
  "dependencies": {
    "@nuxt/eslint": "^0.7.2",
    "@primevue/themes": "^4.2.5",
    "nuxt": "^3.15.0",
    "primevue": "^3.53.1",
    "shiki": "^1.26.1",
    "tailwindcss-primeui": "^0.3.4",
    "vue": "latest",
    "vue-router": "latest"
  },
  "devDependencies": {
    "@cloudflare/workers-types": "^4.20241230.0",
    "@nuxt/eslint-config": "^0.7.4",
    "@nuxtjs/tailwindcss": "^6.12.2",
    "autoprefixer": "^10.4.20",
    "eslint": "^9.17.0",
    "h3": "^1.13.0",
    "nitro-cloudflare-dev": "^0.2.1",
    "nuxt-primevue": "3",
    "postcss": "^8.4.49",
    "tailwindcss": "^3.4.17",
    "typescript": "^5.7.2",
    "wrangler": "^3.99.0"
  }
}

nuxt.config.ts

import { defineNuxtConfig } from 'nuxt/config';

// https://nuxt.com/docs/api/configuration/nuxt-config
export default defineNuxtConfig({
  runtimeConfig: {
    environment: process.env.NODE_ENV || 'development'
  },
  modules: ['nuxt-primevue', '@nuxt/eslint', 'nitro-cloudflare-dev'],
  devtools: { enabled: true },
  css: ['~/assets/css/main.css', 'primevue/resources/themes/aura-light-green/theme.css'],
  compatibilityDate: '2025-01-04',
  nitro: {
    preset: 'cloudflare_module',
    experimental: {
      websocket: true,
    },
  },
  postcss: {
    plugins: {
      tailwindcss: {},
      autoprefixer: {},
    },
  },
  eslint: {
    config: {
      autoInit: true,
      stylistic: {
        quotes: 'single',
        semi: true,
      },
    },
  },
  primevue: {
    components: {
      include: ['Button'],
    },
  },
});

Please provide any relevant error logs

When i run pnpm dev, this is the log output

 ERROR  service core:user:__WRANGLER_EXTERNAL_DURABLE_OBJECTS_WORKER: Worker "core:user:__WRANGLER_EXTERNAL_DURABLE_OBJECTS_WORKER"'s binding "DummyDurableObject" refers to a service "core:user:worker", but no such service is defined.


 ERROR  Failed to initialize wrangler bindings proxy The Workers runtime failed to start. There is likely additional logging output above.

    at Miniflare2.#assembleAndUpdateConfig (node_modules/.pnpm/[email protected]/node_modules/miniflare/src/index.ts:1404:10)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async Mutex.runWith (node_modules/.pnpm/[email protected]/node_modules/miniflare/src/workers/shared/sync.ts:66:45)
    at async Miniflare2.#waitForReady (node_modules/.pnpm/[email protected]/node_modules/miniflare/src/index.ts:1486:3)
    at async Miniflare2._getProxyClient (node_modules/.pnpm/[email protected]/node_modules/miniflare/src/index.ts:1692:3)
    at async Miniflare2.getBindings (node_modules/.pnpm/[email protected]/node_modules/miniflare/src/index.ts:1715:23)
    at async getPlatformProxy (node_modules/.pnpm/[email protected]_@[email protected]/node_modules/wrangler/wrangler-dist/cli.js:180408:20)
    at async _getPlatformProxy (node_modules/.pnpm/[email protected]/node_modules/nitro-cloudflare-dev/dist/runtime/plugin.dev.mjs:48:17)

[emily-shen]

cc @edmundhung is working on it in #7292 🧡

@edmundhung was there any workaround in the meantime?

[edmundhung]

Hi @flashblaze,

Sorry about the unhelpful error message! The Nuxt integration relies on the getPlatformProxy API, which currently doesn’t support Durable Objects on your main worker.

As a workaround, you can run your Durable Object on a separate worker and specify a script_name in the configuration. For more details, please refer to the docs: https://developers.cloudflare.com/workers/wrangler/api/#supported-bindings

[flashblaze]

Thanks for the help @emily-shen and @edmundhung! I'll keep the issue open for now and close this once I've got it up and running by today or tomorrow. I hope that's fine.

[flashblaze]

@edmundhung

I have this api route which would be turned into a worker call. I verified this since it is working after deployment.

// server/api/durable-object.ts
export default defineEventHandler(async (event) => {
    try {
        const env = event.context.cloudflare?.env || event.context.env;
        if (!env?.DUMMY_OBJECT) {
            return { error: 'DUMMY_OBJECT binding not found!' };
        }

        const id = env.DUMMY_OBJECT.idFromName('counter');
        const stub = env.DUMMY_OBJECT.get(id);

        const response = await stub.fetch(event.context.cloudflare.request);
        const data = await response.json() as { value: number };
        return data;
    }
    catch (error) {
        console.error(error);
        return { error: 'Failed to fetch from Durable Object' };
    }
});

I'm calling this route like so from my client

<script setup lang="ts">
const message = ref<number | null>(null);
const error = ref<string | null>(null);

type DurableObjectResponse = {
  value: number;
} | {
  error: string;
};

const callDurableObject = async () => {
  try {
    const response = await $fetch<DurableObjectResponse>('/api/durable-object');
    if ('value' in response) {
      message.value = response.value;
      error.value = null;
    }
    else {
      error.value = response.error;
      message.value = null;
    }
  }
  catch (error) {
    console.error(error);
  }
};
</script>

<template>
  <div class="space-y-4">
    <div>
      <Button @click="callDurableObject">
        Call Durable Object
      </Button>
      <p v-if="message !== null" class="mt-2">
        Response: {{ message }}
      </p>
      <p v-if="error" class="mt-2 text-red-500">
        Error: {{ error }}
      </p>
    </div>
  </div>
</template>

If possible, could you guide me on how can I create a custom script in which I can call my DO with the same functionality as durable-object.ts?

[paulius1230]

@flashblaze Did you solve this issue?

[flashblaze]

Unfortunately no @paulius1230
I moved to separate Hono backend