Cloudflare Developers•3y ago

Starting out with workers and bundling code

Hello, we are trying to build a worker using hono and sequelize. It's basically an API that we will call from various locations, to do CRUD ops into a database (aws aurora mysql currently). Any pointers on how to bundle the code? I've tried to set `type = "webpack" in wrangler.toml but seems like it's deprecated? Thanks

15 Replies

Hello, I’m Allie!•3y ago

wrangler can automatically bundle your code for you. Set your main field to your entrypoint(src/index.ts/js), and it should auto-bundle it.

stavros-kOP•3y ago

I do have this set, but for example I get errors like this:

✘ [ERROR] Could not resolve "url"

    node_modules/pg-connection-string/index.js:3:18:
      3 │ var url = require('url')
        ╵                   ~~~~~

  The package "url" wasn't found on the file system but is built into node.
  Add "node_compat = true" to your wrangler.toml file to enable Node compatibility.


✘ [ERROR] Could not resolve "fs"

    node_modules/pg-connection-string/index.js:4:17:
      4 │ var fs = require('fs')
        ╵                  ~~~~

✘ [ERROR] Could not resolve "url"

    node_modules/pg-connection-string/index.js:3:18:
      3 │ var url = require('url')
        ╵                   ~~~~~

  The package "url" wasn't found on the file system but is built into node.
  Add "node_compat = true" to your wrangler.toml file to enable Node compatibility.


✘ [ERROR] Could not resolve "fs"

    node_modules/pg-connection-string/index.js:4:17:
      4 │ var fs = require('fs')
        ╵                  ~~~~

setting node_compat brings a whole lot of other errors

Hello, I’m Allie!•3y ago

Looks like sequelize isn't compatible with Workers. node_compat can fix some of those issues, but if it requires access to a file system, then it won't work.

stavros-kOP•3y ago

Hmm any ideas of a package for mysql db's that is compatible?

Hello, I’m Allie!•3y ago

Maybe https://planetscale.com/docs/tutorials/planetscale-serverless-driver ? Or https://www.prisma.io/docs/data-platform/data-proxy

stavros-kOP•3y ago

Hmm I'll take a look into them! From a quick look, looks like they are some kind of proxy that you have to pay? Or is just a service that is "also" offered?

Hello, I’m Allie!•3y ago

Prisma comes with Data Proxy usage of 3 million CPU ms/mo, and Planetscale is a Hosted MySQL-compatible database with the following Free Tier:

stavros-kOP•3y ago

Seems a bit weird to pay for CF workers and then also pay for another proxy in to access a database that we also pay 🙂

Hello, I’m Allie!•3y ago

There is also a tutorial to use CF Tunnels for DB Connectivity, but not 100% sure how well it is maintained. The main thing though is that DBs are made with long-running connections in mind, and thus aren't really architectures for short-lived connections with one or two transactions.

stavros-kOP•3y ago

Not sure how tunnel will work with an aurora db in aws :/

Hello, I’m Allie!•3y ago

There are some that are built from the ground up to be made for serverless workloads(Planetscale, Upscale, etc.), but those aren't just hosted MySQL/Postrgres

Hello, I’m Allie!•3y ago

Maybe this? https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/data-api.html

Using the Data API for Aurora Serverless v1 - Amazon Aurora

By using the Data API for Aurora Serverless v1 , you can work with a web-services interface to your Aurora Serverless v1 DB cluster. The Data API doesn't require a persistent connection to the DB cluster. Instead, it provides a secure HTTP endpoint and integration with AWS SDKs. You can use the endpoint to run SQL statements without managing con...

stavros-kOP•3y ago

I see, maybe I'll check if aws have some sort of package/api for its db you beat me to it lol

Hello, I’m Allie!•3y ago

I don't work with AWS very often, but it looks like this might work?

stavros-kOP•3y ago

I'll give it a shot. It's the only thing that I plan to leave to AWS for now. DNS is already migrating to CF and some of the websites

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