Step - merge_v
merge_v · mergeV · category: Changing the graph
Upsert of a vertex: finds the vertices matching the map or creates one; option(Merge.onCreate/onMatch, ..) adds properties (see the book page Upserts).
Forms
merge_v()
merge_v(arg1: any)
Example
g.merge_v(#{"T.label": "person", name: "marko"}).values("age").next() // 29