Elvis 4 REST API - create relation – Home

GET/POST

http://yourserver.com/services/createRelation
    ?relationType=<relation type>
    &target1Id=<asset id>
    &target2Id=<another asset id>
    &metadata=<JSON encoded metadata>
    &<Elvis metadata field name>=<value>

What does it do?

This call creates a relation of a certain type between two assets in Elvis. For example, to add an asset to a collection.

Note: When a relation between two assets exists — even of a different type — it is not possible to create a new one.

Parameters

relationType	The type of relation to create. Required.
target1Id	The id of the asset on one side of the relation. If the relation type is a directional relation, this must be the id of the 'parent'-side. Required.
target2Id	The id of the asset on the other side of the relation. If the relation type is a directional relation, this must be the id of the 'child'-side. Required.
metadata	A JSON encoded object with properties that match Elvis relation metadata field names. This metadata will be set on the relation in Elvis. Optional. You can also use parameters matching Elvis relation field names.
*	Any parameter matching an Elvis relation metadata field name will be used as relation metadata. This metadata will be set on the relation in Elvis. Optional. You also use the 'metadata' parameter.

Return value

The operation returns an empty 200 OK status.

If the operation fails, an error page with a 500 error status will be returned.

Examples

createRelation

http://demo.elvisdam.com/services/createRelation
    ?relationType=contains
    &target1Id=ATT8CDno4QCB59QHmjwnfS
    &target2Id=Cbg9-_ukKEZARORmuaCsn3

Creates a relation between 2 assets. In this case between:

People.collection (ATT8CDno4QCB59QHmjwnfS)
Kiting.jpg (Cbg9-_ukKEZARORmuaCsn3)

You can also use the 'reverse' relation type, but then you also have to reverse the IDs used in target 1 and target 2:

createRelation

http://demo.elvisdam.com/services/createRelation
    ?relationType=contained-by
    &target1Id=Cbg9-_ukKEZARORmuaCsn3
    &target2Id=ATT8CDno4QCB59QHmjwnfS

Document history

27 December 2016: Added note stating that when a relation between two assets exists — even of a different type — it is not possible to create a new one.