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HTTP interface for edges

The Edge API lets you retrieve the connected edges of a single vertex, optionally restricted to incoming or outgoing edges

You can use the general Document API to create, read, modify, and delete edge documents. The only difference to working with vertex documents is that the _from and _to attributes are mandatory and must contain document identifiers.

The Edge API is useful if you want to look up the inbound and outbound edges of a vertex with low overhead. You can also retrieve edges with AQL queries, but queries need to be parsed and planned, and thus have an overhead. On the other hand, AQL is far more powerful, letting you perform graph traversals, for instance.

Addresses of edges

Edges are a special variation of documents and you can access them like any document. See Addresses of documents for details.

Get inbound and outbound edges

GET /_api/edges/{collection-id}
Returns an array of edges starting or ending in the vertex identified by vertex.
Path Parameters

  • The id of the collection.

Query Parameters

  • The id of the start vertex.

  • Selects in or out direction for edges. If not set, any edges are returned.

HTTP Headers

  • Set this header to true to allow the Coordinator to ask any shard replica for the data, not only the shard leader. This may result in “dirty reads”.

Responses

  • is returned if the edge collection was found and edges were retrieved.

  • is returned if the request contains invalid parameters.

  • is returned if the edge collection was not found.

Examples

Any direction

curl --header 'accept: application/json' --dump - http://localhost:8529/_api/edges/edges?vertex=vertices/1
Show output

In edges

curl --header 'accept: application/json' --dump - http://localhost:8529/_api/edges/edges?vertex=vertices/1&direction=in
Show output

Out edges

curl --header 'accept: application/json' --dump - http://localhost:8529/_api/edges/edges?vertex=vertices/1&direction=out
Show output

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