Merging list of maps in gremlin - gremlin

Question

I have this relationship:
person --likes--> subject
This is my query:
g.V().
hasLabel('person').
has('name', 'Joe').
outE('likes').
range(0, 2).
union(identity(), inV().hasLabel('subject')).
valueMap('rating', 'name').
At this point, I get result that looks like this:
[
{
"rating": 3.236155563
},
{
"rating": 3.162886797
},
{
"name": "math"
},
{
"name": "history"
}
]
I'd like to get something like this:
[
{
"rating": 3.236155563,
"name": "math"
},
{
"rating": 3.162886797,
"name": "history"
},
]
I've tried grouping the results - which gives me the structure I want - but because of the identical keys, I only get 1 set of results back.

Answer 1

It always helps when you post the code to create the graph so we can give you a tested answer. Like so
g.addV('person').property('name', 'P1').as('p1').
addV('subject').property('name', 'Math').as('math').
addV('subject').property('name', 'History').as('history').
addV('subject').property('name', 'Geography').as('geography').
addE('likes').from('p1').to('math').property('rating', 1.2).
addE('likes').from('p1').to('history').property('rating', 2.3).
addE('likes').from('p1').to('geography').property('rating', 3.4)
I believe you are trying to write a traversal that starts from a certain person, go out along the first two "likes" edges and get the names of the subjects that he likes and the rating on the corresponding "likes" edge.
g.V().has('person', 'name', 'P1').
outE('likes').
range(0, 2).
project('SubjectName', 'Rating').
by(inV().values('name')).
by(values('rating'))