Cloudflare Developers•8mo ago

Deployment Fails with @sveltejs/adapter-cloudflare

I am attempting to deploy to CloudFlare Page and I believe I need some help setting up my environment. My local environment is setup using Miniflare where I set the platform variable, here is what my hooks.server.ts file looks like:

export const handle: Handle = async ({ event, resolve }) => {
  if (dev) {
    const mf = await import('./lib/server/miniflare');
    event.platform = await mf.setupPlatform();
  }

  event.locals.db = getDB(event.platform!.env.DB);
  event.locals.auth = getAuth(event.platform!.env.DB).handleRequest(event);

  return await resolve(event);
};

export const handle: Handle = async ({ event, resolve }) => {
  if (dev) {
    const mf = await import('./lib/server/miniflare');
    event.platform = await mf.setupPlatform();
  }

  event.locals.db = getDB(event.platform!.env.DB);
  event.locals.auth = getAuth(event.platform!.env.DB).handleRequest(event);

  return await resolve(event);
};

I am using drizzle-orm and lucia-auth for this project. Here are some function definitions function getDB(db: D1Database) => DrizzleD1Database and function getAuth(db: D1Database) => AuthRequest (AuthRequest is a lucia type), however I don't think they are the issue, because it works just fine in my development environment with Miniflare. Here is what my app.d.ts file looks like:

/// <reference types="@sveltejs/adapter-cloudflare" />

declare global {
  namespace App {
    interface Locals {
      auth: import("lucia").AuthRequest;
      db: import('drizzle-orm/d1').DrizzleD1Database<typeof import('$lib/schema')>;
    }
    interface Platform {
      env: {
        DB: D1Database;
        KV: KVNamespace;
        DOCS: R2Bucket;
      };
      context: {
        waitUntil(promise: Promise<any>): void;
      };
      caches: CacheStorage & { default: Cache };
      cf?: IncomingRequestCfProperties;
    }
  }

  namespace Lucia {
    type Auth = import("$lib/server/lucia").Auth;
    type DatabaseUserAttributes = {
       // ...
    };
    type DatabaseSessionAttributes = {};
  }
}

export {};

/// <reference types="@sveltejs/adapter-cloudflare" />

declare global {
  namespace App {
    interface Locals {
      auth: import("lucia").AuthRequest;
      db: import('drizzle-orm/d1').DrizzleD1Database<typeof import('$lib/schema')>;
    }
    interface Platform {
      env: {
        DB: D1Database;
        KV: KVNamespace;
        DOCS: R2Bucket;
      };
      context: {
        waitUntil(promise: Promise<any>): void;
      };
      caches: CacheStorage & { default: Cache };
      cf?: IncomingRequestCfProperties;
    }
  }

  namespace Lucia {
    type Auth = import("$lib/server/lucia").Auth;
    type DatabaseUserAttributes = {
       // ...
    };
    type DatabaseSessionAttributes = {};
  }
}

export {};

When I build and attempt to deploy the build it says the event.platform is undefined:

12:52:36.928    > Using @sveltejs/adapter-cloudflare
12:52:38.216    TypeError: Cannot read properties of undefined (reading 'env')
12:52:38.216        at Object.handle (file:///opt/buildhome/repo/.svelte-kit/output/server/chunks/hooks.server.js:34:42)
...

12:52:36.928    > Using @sveltejs/adapter-cloudflare
12:52:38.216    TypeError: Cannot read properties of undefined (reading 'env')
12:52:38.216        at Object.handle (file:///opt/buildhome/repo/.svelte-kit/output/server/chunks/hooks.server.js:34:42)
...

Deployment ID - 55b93723-6495-4000-bfb4-f3e971753c60 I have search Google for an answer to my problem, but I haven't been able to find anyone else who is having the same problem with platform being undefined in a SvelteKit hooks.server.ts file. I have added the DB, KV and DOCS bindings from the workers dashboard, however I don't think that is the problem as well, because the error shows that the event.platform variable is undefined. Hopefully I have enough information in this post. Any help is appreciated!

5 Replies

kongaskristjan•7mo ago

The event.platform variable is for some reason undefined. Even if I tried using the example provided here https://developers.cloudflare.com/d1/examples/d1-and-sveltekit/, I still run into a very similar problem, that platform is undefined. Did you find any solutions yet @kdamp ?

kdamp•7mo ago

Yes, it is undefined only during your typescript build. It is defined in the Cloudflare runtime. I don't know why, but that's just how it is

kongaskristjan•7mo ago

Thanks for the quick answer, it pointed in the right direction. I found another post that discusses the issue of locally connecting to the database: https://discord.com/channels/595317990191398933/1126398478147407965/1126399469857026079 Basically, if I run this in one terminal

npx vite build --watch

npx vite build --watch

and this in another terminal

npx wrangler pages dev .svelte-kit/cloudflare --live-reload --d1=DB

npx wrangler pages dev .svelte-kit/cloudflare --live-reload --d1=DB

I suddenly gain access to envs, and can connect to a local database.

kdamp•7mo ago

No problem. That is one way to do it! I personally set up a local Miniflare object and assigned that to the platform variable and that works for me. I get really annoyed when running two terminals at the same time lol You can also run it like this

npx wrangler pages dev --d1=DB -- npx vite dev

npx wrangler pages dev --d1=DB -- npx vite dev

The -- allows Cloudflare to make a proxy to the sveltekit port.

bopbeep•6mo ago

thank you so much i was dying

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Deployment Fails with @sveltejs/adapter-cloudflare