CODEWITHSUNDEEP
arangodb
Omnia87
Omnia87

Reputation: 105

ArangoDB - Get edge information while using traversals

I'm interested in using traversals to quickly find all the documents linked to an initial document. For this I'd use:

let id = 'documents/18787898' for d in documents filter d._id == id for i in 1..1 any d edges return i

This generally provides me with all the documents related to the initial ones. However, say that in these edges I have more information than just the standard _from and _to. Say it also contains order, in which I indicate the order in which something is to be displayed. Is there a way to also grab that information at the same time as making the traversal? Or do I now have to make a completely separate query for that information?

Upvotes: 0

Views: 267

Answers (1)

kerry
kerry

Reputation: 767

You are very close, but your graph traversal is slightly incorrect.

The way I read the documentation, it shows that you can return vertex, edge, and path objects in a traversal:

FOR vertex[, edge[, path]]
  IN [min[..max]]
  OUTBOUND|INBOUND|ANY startVertex
  edgeCollection1, ..., edgeCollectionN

I suggest adding the edge variable e to your FOR statement, and you do not need to find document/vertex matches first (given than id is a single string), so the FOR/FILTER pair can be eliminated:

LET id = 'documents/18787898'
FOR v, e IN 1 ANY id edges 
   RETURN e

Upvotes: 2

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