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What is the fieldId of the Attach File column on the attachments/mediaitem sublist on a message record?

&gt;*AI generated answer (using internal Slack threads):*
The fieldId of the Attach File column on the attachments/mediaitem sublist on a message record is `expmediaitem`. This can be set using SuiteScript as shown in the code snippet below:

```javascript
rec.setCurrentSublistValue({
sublistId: "expense",
fieldId: "expmediaitem",
value: 7800,
})
```
In this example, `7800` is the file ID of the existing file you want to attach.

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Disclaimer:

This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes.
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&gt;*Slack thread 1:* <https://netsuiteprofessionals.slack.com/archives/C29HQS63G/p1640036616000900|here> (available only if the original thread was posted in the last 90 days)
&gt;*Similarity score:* 0.828512549

&gt;*Slack thread 2:* <https://netsuiteprofessionals.slack.com/archives/C29HQS63G/p1686144636964999|here> (available only if the original thread was posted in the last 90 days)
&gt;*Similarity score:* 0.817662597

&gt;*Slack thread 3:* <https://netsuiteprofessionals.slack.com/archives/C29HQS63G/p1545251389337900|here> (available only if the original thread was posted in the last 90 days)
&gt;*Similarity score:* 0.815246



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