Graph API: Filter Teams Export API by channel ID

Question

I am trying to use the Graph API's Teams Export API to export all messages in a single Teams channel. I know that my permissions are set up correctly - if I request GET https://graph.microsoft.com/v1.0/teams/{TEAM_ID}/channels/getAllMessages, I get a list of every message in every channel in the team. The linked documentation also includes a sample request that uses $filter to get results with a lastModifiedDateTime between two limits; I get the expected results from calling something like this.

The obvious approach is to request https://graph.microsoft.com/v1.0/teams/{TEAM_ID}/channels/getAllMessages?$filter=channelIdentity/channelId eq '{CHANNEL_ID}'. This returns the following error:

{  
  "error": {  
    "code": "BadRequest",  
    "message": "The entity property 'channelIdentity/channelId' and operationKind 'Equal' is not allowed in $filter query.",  
    "innerError": {  
      "date": "2022-11-17T18:27:18",  
      "request-id": "...",  
      "client-request-id": "..."  
    }  
  }  

What I'm gathering here is that we can't run an equality operation on this field. Is there some kind of documentation specifying which operations are allowed on which fields?

I also tried using startswith instead. GET https://graph.microsoft.com/v1.0/teams/{TEAM_ID}/channels/getAllMessages?$filter=startswith(channelIdentity/channelId, '{TRUNCATED CHANNEL ID}') returns this error:

{  
  "error": {  
    "code": "BadRequest",  
    "message": "Only binary operation expressions are allowed.",  
    "innerError": {  
      "date": "2022-11-17T18:38:05",  
      "request-id": "...",  
      "client-request-id": "..."  
    }  
  }  
}  

I have no idea what this error message is trying to tell me. As I read it, a "binary operation expression" should resolve to a boolean result on each candidate; I don't see why that wouldn't work with this query.

My primary question is, how do I return only results from a single channel from the Teams Export API? Is it even possible to do so using $filter?

Another strange behavior I noticed: the sample query on the documentation gets the top 50 results between two lastModifiedDateTimes: GET https://graph.microsoft.com/v1.0/teams/{id}/channels/getAllMessages?$top=50&$filter=lastModifiedDateTime gt 2020-06-04T18:03:11.591Z and lastModifiedDateTime lt 2020-06-05T21:00:09.413Z. This works as expected. If I remove one of the date limits, though, I get an error: GET https://graph.microsoft.com/v1.0/teams/{id}/channels/getAllMessages?$top=50&$filter=lastModifiedDateTime gt 2020-06-04T18:03:11.591Z returns "message": "Invalid $filter query.". What is invalid about this filter?

Answer 1

Hi @David Proctor ,

Thanks for reaching out.

Graph API which you are referring to retrieve messages of channel in a team, only support the listed query parameters, as per this documentation $filter is supported with dateTime range query on lastModifiedDateTime.
Retrieve the list of messages (without the replies) in a channel of a team, please use the graph API: GET /teams/{team-id}/channels/{channel-id}/messages, refer this documentation for more details.

To get the replies for a message, call the list message replies or the get message reply API.

Hope this helps.

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