Can't update attachment with API v2

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Using API v2 and `PATCH` to update attachments, keep getting corrupted files.

I'm using javascript with this logic to create the stream:

const readableStream = new Readable();
// eslint-disable-next-line @typescript-eslint/no-empty-function
readableStream._read = () => {};
readableStream.push(fileContent);
readableStream.push(null);

This is the headers:

Accept: 'application/json',
'Content-Type': 'application/json; odata.metadata=minimal; odata.streaming=true',
'IF-MATCH': '*',
'User-Agent': 'axios/0.26.0',
'Content-Length': 413658

What am I doing wrong?

Categories:

Integration with Dynamics 365 products

Development

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YUN ZHU 68,242 Super User 2024 Season 2 on at

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Can't update attachment with API v2

Hi, I suspect it's an Endpoint problem.

The first thing to note is that this standard Attachment API is not Document Attachment (table 1173), but Incoming Document (table 130). Second, this requires specifying the parent ID.

https://learn.microsoft.com/en-us/dynamics365/business-central/dev-itpro/api-reference/v2.0/api/dynamics_attachment_update?wt.mc_id=DX-MVP-5004336

Although not exactly the same, I mention this in the post below in hopes of giving you some tips.

How to automatically upload files from OneDrive to Business Central with Power Automate (No customization)
https://yzhums.com/39365/

Thanks.

ZHU