Using REST to post attachment and link to record

[ScottNess3]

I'm trying to use power shell to post an attachment and then link to an existing record.  I've can test the post attachment by bytes with the API tool, but my power shell script is returning a ProtocolError (400) bad request.

try
{
    $api_url = $base_url + "/platformapi/core/content/attachment"
    $body = @"
    {
    "AttachmentName": "file2.docx",
    "AttachmentBytes": "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    }
"@    
    $results = Invoke-RestMethod -Method POST -Uri $api_url -Headers $headers -ContentType "application/json"
     if ($results.IsSuccessful -and $results.ValidationMessages.count -eq 0) {
        $results.RequestedObject
        $File_ID = $results.RequestedObject.Id
        "File ID = " + $File_ID
    }
    else {
        $results.ValidationMessages
    }
}
catch {
    $_.Exception | Format-List -Force
}
finally {
    $results = $null
}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

 Once this is resolved, the next step will be the content update to link the record to the file, which I'm pretty sure is 

try {
$api_url = $base_url + "/platformapi/core/content"
    $body = @"
    {"Content": {"Id": 942981, "LevelId": 393, "FieldContents": {
    "27655": {"Type": 11, "Tag": "Attachments", "Value": [288],"FieldId": 27655 }
    }
    }
    }
"@
    $results = Invoke-RestMethod -Method PUT -Uri $api_url -Body $body -Headers $headers -ContentType "application/json" -WebSession $sess
    if ($results.IsSuccessful -and $results.ValidationMessages.count -eq 0) {
        $results
        }
    else {
        $results.ValidationMessages
    }
}
catch {
    $_.Exception|Format-List -Force
}
finally {
    $results = $null
}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

However, I've also noticed that when using the API Tool with the content update it is removing the existing attachment and replacing it with the Id value in the script.  Is it a different method to add the attachment without overriding the existing one?

Thanks

[ScottNess3]

Done..  Can I get it tomorrow??   

[ScottNess3]

Jeff Letterman‌

Keeping with the process to capture any existing attachment ID values, I can use the API tool with the /api/core/content/fieldcontent and it will return a result like:

[
{
"Links": [],
"RequestedObject": {
"Id": 942981,
"LevelId": 393,
"SequentialId": 33,
"FieldContents": {
"27655": {
"Type": 11,
"Value": [
292
],

From above, the 292 is the correct attachment ID value.

But in the power shell script, the result is:

Id : 942981
LevelId : 393
SequentialId : 33
FieldContents : @{27655=}

As displayed above, no values are being returned in the field contents.  Guessing there is something wrong in my script?

$api_url = $base_url + "/platformapi/core/content/fieldcontent"
    $body = '{ "FieldIds":[27655],
      "ContentIds":[942981]
    }'
    $results = Invoke-RestMethod -Method Post -Uri $api_url -Body $body -Headers $headers -ContentType "application/json" -WebSession $sess
    if ($results.IsSuccessful -and $results.ValidationMessages.count -eq 0) {
        $results.RequestedObject
}
    else {
        $results.ValidationMessages
    }
}
catch {
    $_.Exception|Format-List -Force
}
finally {
    $results = $null
}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍