How to build REST attachment URL using Arcade

[TD1]

Been playing around with Arcade to build a REST URL which points to the photo attachments on the record.

I have 1,400 records with photo attachments (most have more than one attachment) and this is what I have so far but it's pulling the attachment ID and how do I handle separate URL links for each attachment on that record if there are multiple?

var Part1 =       "https://services.arcgis.com/Enter ID/arcgis/rest/services/ Enter Feature service/FeatureServer/0/"
      var ObjectID = $feature.OBJECTID
      var Part2 = "/attachments/"
      var AttachID = $feature.AttachID
      When($feature.CountAttachments > 0, Part1 + ObjectID + Part2 + AttachID, null)

[FlorianArtelt]

Is this case, you should have is array of attachment IDs in the variable "AttachID".

You have to use a for-loop and go through each ID.

Something like this:

var attachid = [1, 2]

    var textstring = []

if (count(attachid)>0){

  for(var id in attachid){

    var textstringpart = "BaseURL/" + Text(attachid[id])

    push(textstring, textstringpart)

  }

}

return Concatenate(textstring, ", ")

If you want to have a clickable link, you need to have a couple of fields for each link.