How to query attachment info from a map service?

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Like feature layers have the queryAttachmentInfos() method to fetch attachment info, is there something like this to fetch attachment info from a map service (ArcGISDynamicMapServiceLayer)?

My app flow is as follows

  1. query the map service based on some user defined criteria
  2. set info templates for the returned features (attributes + geometry) (this is also where i specify showAttachments: true but again no luck)
  3. add features to map.graphics and show the info window (custom popup in my case)
I have also tried using the attachment editor and the attribute inspector but with no luck.

Should i use the relationship query task? The problem with using the relationship query, i assume, would be that it would be impossible to know if the related record is an attachment or some other related record.



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