it's a ticketing platform. you create an event (i'll make a DO for each), and you can create tickets

it's a ticketing platform. you create an event (i'll make a DO for each), and you can create tickets for each person attending (stored inside the DO). The problem is that I will need the following queries to execute rather quickly:

get all users (paginated) of each event.
get info about a specific ticket (they can have policies, so i'll want the ticket to return with the policies it follows)
find a ticket based on queries such as "holder's name"

policies are shared among other tickets too, so

tickets

tickets

tickets

tickets and

policies

policies

policies

policies have a many-to-many relation

i can handle joins since i could handle constrains myself given the (relative) simplicity of the data.

tl;dr: i can't really not store the data or make a DO per ticket, since looking into every single "ticket DO" would be excruciatingly slow

Vveeque it's a ticketing platform. you create an event (i'll make a DO for each), and yo...

1984 Ford Laser•4/15/25, 9:38 PM

One thing I do here is store a list of IDs in a 'parent' DO to be able to easily pull the required lists of tickets/instances where you need. This is one area where DOs aren't super optimised, I wish there was a way to have like a foreign key relationship that would automatically pull/push updates to related DO instances, almost as subrequests that are abstracted away by the runtime

11984 Ford Laser One thing I do here is store a list of IDs in a 'parent' DO to be able to easily...

veequeOP•4/15/25, 10:28 PM

I thought about doing that. The "main" worker, the one that handles the request that may need to operate on one—or more—DOs knows the name of the "consumed" DO to use (as you'd expect). Instead of making a parent DO to know all children I was planning on just making it so you, by default, use my-do-uuid/0my-do-uuid/0 for the first one. You would then run a stub.hasMoreShards()stub.hasMoreShards() and if that returns truetrue you'll move on to my-do-uuid/1my-do-uuid/1 and so on. I would have to set that flag myself, but it's not that difficult to do.

Reading my message again even I'm confused. In context:

The worker receives a request to find a particular ticket for a particular event. It does into the do with name event-uuid/0event-uuid/0. Finds nothing by running an SQL query. Sees that calling hasMoreShards()hasMoreShards() on that stub returns truetrue. Goes to event-uuid/1event-uuid/1 and does the same.

san•4/16/25, 1:58 AM

Is there a way to run AI generated code in a durable object?

Ssan Is there a way to run AI generated code in a durable object?

Hello, I’m Allie!•4/16/25, 3:16 AM

You would need to redeploy the Worker that hosts the Durable Object. Workers cannot execute code that wasn't present when they were uploaded

san•4/16/25, 3:22 AM

seems like a good feature to add for ai agents?

Rrh Is something like https://github.com/cloudflare/workers-rs also available for C+...

formatc2013•4/16/25, 8:36 AM

check this out
https://cpp.js.org/docs/guide/integrate-into-existing-project/cloudflare-worker

Cloudflare Worker | Cpp.js

You can use cpp.js to compile native code from your project into WebAssembly. To do this, add the build script and cpp.js as a dependency in the package.json file of your project.

veequeOP•4/16/25, 7:48 PM

https://developers.cloudflare.com/workers/platform/storage-options/ needs to be updated since kv DOs don't have a 50gb per account limit (with sql)

Hhannes No, this is an important security criteria.. Cloudflare needs to be able to chec...

san•4/17/25, 11:24 AM

does cloudflare check your code for attack vectors on deploy?

san•4/17/25, 11:29 AM

interesting. if they don't check then disabling dynamic code is useless if you can just deploy a worker from another worker. That said, an MCP server to deploy cloudflare stuff sounds neat

Ssan interesting. if they don't check then disabling dynamic code is useless if you c...

Larry•4/17/25, 11:34 AM

You have to have jumped through a bunch of hoops to code your system to be able to route user traffic to generated code so this is a case of being given enough rope to hang yourself but leaving it up to you to not tie it into a noose and stick your head in it.

Hhannes Part of their „security in depth“ approach is to be able to scan all scripts for...

Unsmart•4/17/25, 4:38 PM

Workers are part of the SOC2 scope: https://www.cloudflare.com/trust-hub/compliance-resources/soc-2/

1984 Ford Laser•4/18/25, 1:21 AM

Anyone designed a client/UI that maintains a dozen+ socket connections? I am planning to use partysocketpartysocket to listen for updates on a bunch of sockets but want to check if there are any implementation quirks I should be aware of

FiveGuys•4/18/25, 4:05 AM

Is there a way to get into the new Durable Object Containers alpha/beta?

FFiveGuys Is there a way to get into the new Durable Object Containers alpha/beta?

1984 Ford Laser•4/18/25, 6:47 AM

Wait until June

11984 Ford Laser Anyone designed a client/UI that maintains a dozen+ socket connections? I am pla...

Grant•4/18/25, 3:40 PM

Haven't tried many client sockets and not sure of limitations, but I believe at minimum each browser has its own limitations on sockets, either across all tabs or per-host. If that proves to be constraining you could possibly use one DO/socket that brokers messages from multiple other DOs via RPC to reduce client sockets to 1.

GGrant Haven't tried many client sockets and not sure of limitations, but I believe at ...

Larry•4/18/25, 7:28 PM

If you are connecting to a dozen different DOs, that should work, but I think there is a browser limit of 30 or so open total.

ddsgadget•4/19/25, 1:25 AM

Hi, we are trying use the Alarms API in durable objects. Our pseudo code is below. Our code works, but for some reason, the alarm will only fire once (in our case, 60 seconds after the Durable Object code is executed). After the first run of the alarm, the alarm does not fire again. I was under the impression that an Alarm will fire multiple times until it is deleted, very much like a cron. Is the intended activity to fire only once? If not, why does our Alarm only fire once? What is the code to make it like a cron, so it fire for example, every 60 seconds? From what I can tell an Alarm only fires once when the durable function is called? Is there a way to set an ongoing Alarm that continues to fire after the first one is set? async getReceipts(): Promise<any> {

let currentAlarm = await this.ctx.storage.getAlarm();
if (currentAlarm == null) {
this.ctx.storage.setAlarm(Date.now() + 1000 * SECONDS);
}

}
async alarm() {
console.log('We have fired the alarm for Check Receipts! Call the Workflow here!');
}

Dddsgadget Hi, we are trying use the Alarms API in durable objects. Our pseudo code is belo...

Khafra•4/19/25, 2:45 AM

Alarms have guaranteed at-least-once execution and are retried automatically when the alarm() handler throws.

You can setAlarm within the alarm handler to have it reschedule/run every 60 seconds

KKhafra > Alarms have guaranteed at-least-once execution and are retried automatically w...

ddsgadget•4/19/25, 10:16 AM

Brilliant, thank you! Didn't realize you could do that, but I tried and it works. It's kind of like a recursive function. Quick question before doing setAlarm in the actual alarm function, I did deleteAlarm() as a precaution. do you think its necessary? Im just worried some alarm is hanging around or something and would cause a bug later.

Dddsgadget Brilliant, thank you! Didn't realize you could do that, but I tried and it works...

boop•4/19/25, 11:20 AM

You can only have 1 alarm, calling setAlarm will replace the existing alarm

veequeOP•4/19/25, 12:40 PM

how can i see if a do has been instantiate before/if any storage is attatched to it?

veequeOP•4/19/25, 12:40 PM

besides having a value is set to "true" and using that

Dddsgadget Brilliant, thank you! Didn't realize you could do that, but I tried and it works...

John Spurlock•4/19/25, 2:38 PM

No need to call deleteAlarm()deleteAlarm() immediately before setAlarm()setAlarm(). Think of an alarm as setting the value of a special single key in a DO's storage. Setting the value overwrites any old value. And you would call deleteAlarm()deleteAlarm() to clear out the value - ie if you no longer need to be awakened in the future

Vveeque how can i see if a do has been instantiate before/if any storage is attatched to...

1984 Ford Laser•4/19/25, 10:20 PM

The GraphQL API will give you a list of the instantiated IDs from each DO namespace when querying durableObjectsStorageGroupsdurableObjectsStorageGroups

1984 Ford Laser•4/19/25, 10:21 PM

Otherwise, if its a KV DO then just do a list()list() and see if anything is returned, SQL DO you use ctx.storage.sql.databaseSizectx.storage.sql.databaseSize

keerth•4/20/25, 2:38 PM

general-helpDurable Objects

keerth•4/20/25, 2:39 PM

Created a question here, so I’m planning to use durable objects to create a basic vite app with a global counter, any ideas why I can’t add the object here, in general add binding with durable objects shows paid but I have been able to deploy templates with free plan

gruntlord6•4/20/25, 3:03 PM

Are you binding as a sql based durable object ?

gruntlord6•4/20/25, 3:04 PM

Those are the only free ones,kv is the default and requires a paid plan

Ggruntlord6 Those are the only free ones,kv is the default and requires a paid plan

keerth•4/20/25, 3:28 PM

I was trying to do it via the UI now trying via the code -

keerth•4/20/25, 3:28 PM

not sure why it's giving that error, have put the configuration but seems to say it needs to have it

gruntlord6•4/20/25, 3:33 PM

try using the starter first and matching the json it outputs? it looks like your wrangler is configured correct but the error indicates it expects it different

gruntlord6•4/20/25, 3:33 PM

https://developers.cloudflare.com/durable-objects/get-started/ click the deploy to cloudflare button

Cloudflare Docs

Get started · Cloudflare Durable Objects docs

This guide will instruct you through:

keerth•4/20/25, 3:33 PM

yeah perfect, I just had the same idea, created durable object finally

keerth•4/20/25, 3:34 PM

not sure why it wasn't working with that code, but thanks for solving this bug! helped a lot!

gruntlord6•4/20/25, 3:34 PM

I am guessing your syntax was off slightly

keerth•4/20/25, 3:34 PM

yeah exactly, the usual with these config issues

gruntlord6•4/20/25, 3:34 PM

I have similar issues when I use graphql, rather then telling me its incorrect it often returns different data then I expect

keerth•4/20/25, 3:34 PM

exactly, classic

keerth•4/20/25, 3:35 PM

getting misdirected by the errors happen so much with config stuff

gruntlord6•4/20/25, 3:35 PM

thats why I appreciate starters so much haha

gruntlord6•4/20/25, 3:35 PM

stops you from chasing ghosts on the basic config

keerth•4/20/25, 3:36 PM

haha exactly, like I copy and pasted the hello-world starter one and replaced with counter, and boom it was solved!

gruntlord6•4/20/25, 3:43 PM

Question for the devs, since containers are going to be based on durable objects, will they be able to commuicate with workers and durable objects?