dosubot[bot] commented on issue #2691:
URL:
https://github.com/apache/incubator-hugegraph/issues/2691#issuecomment-2461718122
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Hey @dbwuc, I'm here to help with any bugs, questions, or contributions you
have regarding the K-neighbor API. Let's work together to resolve this issue
while we wait for a human maintainer.
<!-- Answer -->
To ensure that each vertex returns its corresponding upstream vertex when
using the K-neighbor API (POST, advanced version), you need to set the
`withPath` parameter to `true` in your request. This configuration will allow
the API to return paths, which include the upstream vertices for each vertex.
Here's an example of how you might structure your request:
```json
{
"source": "your-source-vertex-id",
"steps": {
"direction": "BOTH",
"edge_steps": [
{"label": "knows", "properties": {"weight": "P.gt(0.1)"}},
{"label": "created", "properties": {"weight": "P.gt(0.1)"}}
],
"vertex_steps": [],
"max_degree": 10000,
"skip_degree": 100000
},
"max_depth": 3,
"limit": 10000,
"with_vertex": true,
"with_path": true
}
```
By setting `withPath` to `true`, the API will return paths that include the
upstream vertices, ensuring that each vertex returns its corresponding upstream
vertex
<sup>[[1]](https://github.com/apache/incubator-hugegraph/blob/master/hugegraph-server/hugegraph-api/src/main/java/org/apache/hugegraph/api/traversers/KneighborAPI.java)</sup><sup>[[2]](https://github.com/apache/incubator-hugegraph/blob/master/hugegraph-server/hugegraph-test/src/main/java/org/apache/hugegraph/api/traversers/KneighborApiTest.java)</sup>.
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