CosmosDB图形：如何使用gremlin更新具有多个值的属性的顶点？

Question

According to cosmosDB graph documentation, a vertex can have property with multiple values. https://docs.microsoft.com/en-us/azure/cosmos-db/gremlin-support

So while adding vertex if we define multiple values for a property, it gets added.

Suppose my query is :

g.addV('employee').property('id', 'john').property('country', 'USA').property('country', 'India')

Result is:

[{"id":"john","label":"employee","type":"vertex","properties":{"country":
    [{"id":"5dc2aaf6-cb11-4d4a-a2ce-e5fe79d28c80","value":"USA"},
     {"id":"fcf4baf6-b4d5-45a3-a4ba-83a859806aef","value":"India"}]}}] 

But while updating vertex, if we update a property with multiple values.

Query is:

g.V('john').property('country', 'USA').property('country', 'India').property('country', 'China')

Result is:

[{"id":"john","label":"employee","type":"vertex","properties":{"country":
    [{"id":"7e5d9847-31e5-4a59-82f9-b78e744420a1","value":"China"}]}}]

How to update this property with multiple values?

Answer 1

You're missing the list keyword that will allow you to add additional properties.

I'd recommend reading the Tinkerpop docs on VertexProperties

g.V('john').property(list, 'country', 'USA')
   .property(list, 'country', 'India')
   .property(list, 'country', 'China')