How to get map of properties for Edge and Vertex in java?

[Mohit Shah]

When I do query to get certain vertices or certain edges, I gets only id and label for edges and vertices.

I tried to use .valueMap().by(unfold()).with(WithOptions.tokens), but in java, I have to do a lot of parsing and it's getting tedious with bigger queries.

How can I get properties in ReferenceVertex objects while retrieving vertices? Any help would be appreciated.

[Stephen Mallette]

The point of a "reference" is that it is just T.id and T.label, so there is no such approach to doing that. In fact, if you look at ReferenceVertex (in any language variant) you'll see that properties() are not even supported at the code level. I don't follow what you mean by "I have to do a lot of parsing and it's getting tedious with bigger queries."  How is working with a Map representation of a Vertex/Edge different from working with the Vertex/Edge itself if properties were included? Their structures are virtually identical.

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[Mohit Shah]

Ok got it. I guess I should just keep using Path to get edges and vertices using the answer provided by you from this link: https://stackoverflow.com/questions/33676566/gremlin-get-all-incoming-and-outgoing-vertex-including-their-edges-and-directio

I am also doing pagination in my queries, with that I need to specify step names and get the result for that step and parse the result. I found it a bit tedious. I was hoping to get properties with vertices and edges every time.

[Stephen Mallette]

maybe you should provide some examples of what you're doing. i'm still trying to follow the "tedious" part...maybe there's an easier way that we can suggest?

On Wed, Sep 11, 2019 at 11:10 AM Mohit Shah <mohit....@gmail.com> wrote:

Ok got it. I guess I should just keep using Path to get edges and vertices using the answer provided by you from this link: https://stackoverflow.com/questions/33676566/gremlin-get-all-incoming-and-outgoing-vertex-including-their-edges-and-directio

I am also doing pagination in my queries, with that I need to specify step names and get the result for that step and parse the result. I found it a bit tedious. I was hoping to get properties with vertices and edges every time.

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[Mohit Shah]

I have a graph like this.

User - FOLLOW -> Tag <- HAS - Content

User can follow tags and content will have tags.

HAS connection will have some kind of score.

I would like to get all tags followed by a user and 5 contents belong to individual tag sorted by score. (for every tag, sort contents by score present on HAS connection)

Example : 

User is following tag1, tag2, tag3.

content1 has tag1, tag2

content2 has tag2,tag3

content3 has tag1

content4 has tag1

content5 has tag2

content6 has tag1

Result : 

map of tags : 

tag1 -> list of sorted contents limit to 5, 

tag2 -> list of sorted contents limit to 5, 

tag3 -> list of sorted contents limit to 5

This is only 2 level queries, I also have some other complicated queries. I would always like to return a few attributes present on tags and contents.

[Stephen Mallette]

well, that's you're query requirements, but that isn't demonstrating to me what part for you is tedious and difficult. can you please explain that part further? it would be helpful if you showed some actual Gremlin (e.g. a sample data generation script, the traversal that you're executing now, etc.)

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