Unable to update columnDefinition of an existing column in Sharepoint list using graphApi - BadRequest error - microsoft-graph-api

Question

Sample payload:
{
"text": {
"maxLength": 1000
}
}
And my PATCH Url is
https://graph.microsoft.com/v1.0/sites/my-site-id/lists/my-list-id/columns/my-column-id
I am providing the usual headers
Accept: application/json
Content-Type: application/json
And
Authorization: Bearer Token....
I get BadRequest error
{
"error": {
"code": "invalidRequest",
"message": "One of the provided arguments is not acceptable.",
"innerError": {
"code": "badArgument",
"date": "2023-01-30T16:34:49",
"request-id": "b63137f9-fda0-41b7-9549-5952b5c89427",
"client-request-id": "b63137f9-fda0-41b7-9549-5952b5c89427"
}
}
}
I tried adding "propagateChanges": true to the payload and I get slightly different error
{
"error": {
"code": "invalidRequest",
"message": "Invalid request",
"innerError": {
"date": "2023-01-30T16:39:37",
"request-id": "41ca6541-6097-45c6-9418-d1cf57272d2c",
"client-request-id": "41ca6541-6097-45c6-9418-d1cf57272d2c"
}
}
}
Any help is appreciated.
NOTE: I am able to update for e.g. Description of the column, but not the text.maxLength property.

Answer 1

The maximum length of a SharePoint text field type is 255, you cannot set it to 1000. If you try setting the max length to 200 for example instead of 1000, your query should succeed.
To allow longer strings, you have to use the "note" ("multiline text") field type, not "text". This one has a limit of 63,999.
I am not sure if you can change column type using graph api (you cannot as far as I remember, but I am not 100% sure), you may need to re-create that column as "multiline", change manually, use the classic rest api instead of graph api to do it programmatically, or something like a powershell script.

Answer 2

If you have textColumn and allowMultipleLines is set to false then you have one line text column and the maximum length is 255.
It's not possible to change column type from one line text to multiple lines text via Graph API.
Call
PATCH https://graph.microsoft.com/v1.0/sites/my-site-id/lists/my-list-id/columns/my-column-id
{
"text": {
"allowMultipleLines": true,
"appendChangesToExistingText": false,
"linesForEditing": 6,
"textType": "plain"
}
}
Will fail.
You have to create a new column and define it as multiple lines. Define textColumn and set allowMultipleLines to true.
POST https://graph.microsoft.com/v1.0/sites/my-site-id/lists/my-list-id/columns
{
"description": "",
"displayName": "Column XXX",
"enforceUniqueValues": false,
"hidden": false,
"indexed": false,
"name": "My new multiple lines column",
"readOnly": false,
"required": false,
"text": {
"allowMultipleLines": true,
"appendChangesToExistingText": false,
"linesForEditing": 6,
"textType": "plain"
}
}