Error: 'This record name or ID name already exists' when submitting a record on Enketo

[dkwa...@ona.io]

Hello,

I am getting an error This record name or ID name already exists when submitting a record. An image of the error message is attached. What could be the reason for this?

Regards,

Darlene

[Martijn van de Rijdt]

Hi Darlene,

Does this happen when you click the 'Submit' button or when you click the 'Save Draft' button? 

In the case of the former you may have found a bug. I remember there has been a bug like this in the past. Which version/service of Enketo are you using?

Cheers,
Martijn

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[dkwa...@ona.io]

Hi Martijn,

This error came up again when clicking on the Submit button. The Enketo version is 1.50.1

Regards,

Darlene

On Monday, May 15, 2017 at 7:01:03 PM UTC+3, Martijn van de Rijdt wrote:

Hi Darlene,

Does this happen when you click the 'Submit' button or when you click the 'Save Draft' button? 

In the case of the former you may have found a bug. I remember there has been a bug like this in the past. Which version/service of Enketo are you using?

Cheers,
Martijn

On Mon, May 15, 2017 at 8:59 AM, <dkwa...@ona.io> wrote:

Hello,

I am getting an error This record name or ID name already exists when submitting a record. An image of the error message is attached. What could be the reason for this?

Regards,

Darlene

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[mschr...@ona.io]

Hello,

We are also experiencing this error "This record name or ID name already exists" when submitting a record. However, it does not appear for all form submissions. What could be possible reasons for this?

Regards,

Megan

[Martijn van de Rijdt]

Hi Megan,

The underlying reason is that a record with that instanceID is already saved in the browser storage. The ID-generation should theoretically almost completely avoid collisions (1 in several billions chance I believe), so it's likely some reproducible issue caused by a bug in the code. Until we can reproduce it reliably though, it will be hard to figure out what is going on. I hope somebody comes up with a way to reproduce it.

Cheers,
Martijn

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[Peter Lubell-Doughtie]

It sounds pretty reasonable to have code which handles collisions, like checks if a created hash matches an existing hash in browser storage and if it does creates another until it doesn't match.

Do you see any reasons against that sort of change?

[Martijn van de Rijdt]

I'm thinking it's somehow probably the same record, and not a collision, in which case it could be problematic. Unless..., perhaps there is bug here? https://github.com/enketo/enketo-xpathjs/blob/master/src/engine.js#L4505. I haven't actually tested this.

[Peter Lubell-Doughtie]

True, given the odds it makes sense this is probably not a collision.

If it comes to investigating a less likely UUID issue, the 2nd answer in the linked SO post mentions a potential issue with `Math.random()` as well as a new implementation of uuidv4, in an update on that SO answer, but it relies on ES6, https://stackoverflow.com/a/2117523

[Khaled Hasan]

Hi, I have changed my browser and it solved the issue. I also cleaned my cash of my chrome and working now.

khaled 

[Martijn van de Rijdt]

update: https://github.com/enketo/enketo-express/issues/416