I have this test data.
{
"entityCode": "1ae1067d-2590-4f2e-ad74-f888a7ea7193",
"entityName": "Arda",
"childEntities": [
{
"entityCode": "ab5368aa-7abc-4f31-b980-7042fb1943e8",
"entityName": "Middle Earth",
"childEntities": [
{
"entityCode": "b81636a3-8e21-4ad9-a299-39eed1936a5d",
"entityName": "Gondor",
"childEntities": []
}]
}]
}
I have two working queries, one to return entity with the ancestors, the 2nd, to return with the descendants.
With the ancestors
g.V()
.has('_affinity', 'geography')
.has('isDeleted', false)
.not(outE('isChildOf').has('hierarchyCollection', 'default'))
.where(inE('isChildOf').has('hierarchyCollection', 'default').has('isDeleted', false))
.emit()
.repeat(inE('isChildOf').has('hierarchyCollection', 'default').has('isDeleted', false)
.dedup().outV().dedup().has('_affinity', 'geography').has('isDeleted', false))
.has('id', 'ab5368aa-7abc-4f31-b980-7042fb1943e8')
.tree()
With the descendants
g.V('ab5368aa-7abc-4f31-b980-7042fb1943e8')
.has('_affinity', 'geography')
.has('isDeleted', false)
.emit()
.repeat(inE('isChildOf').has('hierarchyCollection', 'default').has('isDeleted', false)
.dedup().outV().dedup().has('_affinity', 'geography').has('isDeleted', false))
.tree()
This returns the ancestor
[
{
"1ae1067d-2590-4f2e-ad74-f888a7ea7193": {
"key": {
"id": "1ae1067d-2590-4f2e-ad74-f888a7ea7193",
"label": "geography",
"type": "vertex",
"properties": {
"_affinity": [
{
"id": "1ae1067d-2590-4f2e-ad74-f888a7ea7193|_affinity",
"value": "geography"
}
],
"isDeleted": [
{
"id": "266fb8c3-588f-4ac6-93bf-912cb965349a",
"value": false
}
],
"entityCode": [
{
"id": "e57d00fb-dba6-4792-9763-fbfa2b75788b",
"value": "1ae1067d-2590-4f2e-ad74-f888a7ea7193"
}
]
}
},
"value": {
"cf5e5c4f-3a54-48dd-8d3d-aebec1b7b406": {
"key": {
"id": "cf5e5c4f-3a54-48dd-8d3d-aebec1b7b406",
"label": "isChildOf",
"type": "edge",
"inVLabel": "geography",
"outVLabel": "geography",
"inV": "1ae1067d-2590-4f2e-ad74-f888a7ea7193",
"outV": "ab5368aa-7abc-4f31-b980-7042fb1943e8",
"properties": {
"hierarchyCollection": "default",
"isDeleted": false
}
},
"value": {
"ab5368aa-7abc-4f31-b980-7042fb1943e8": {
"key": {
"id": "ab5368aa-7abc-4f31-b980-7042fb1943e8",
"label": "geography",
"type": "vertex",
"properties": {
"_affinity": [
{
"id": "ab5368aa-7abc-4f31-b980-7042fb1943e8|_affinity",
"value": "geography"
}
],
"isDeleted": [
{
"id": "196b8bbd-1c1e-4f58-8ab9-9a2b858550f7",
"value": false
}
],
"entityCode": [
{
"id": "1b7e64a6-0b73-40ce-8679-e33b9d0e1fa3",
"value": "ab5368aa-7abc-4f31-b980-7042fb1943e8"
}
]
}
},
"value": {}
}
}
}
}
}
}
]
as well as the descendant
[
{
"ab5368aa-7abc-4f31-b980-7042fb1943e8": {
"key": {
"id": "ab5368aa-7abc-4f31-b980-7042fb1943e8",
"label": "geography",
"type": "vertex",
"properties": {
"_affinity": [
{
"id": "ab5368aa-7abc-4f31-b980-7042fb1943e8|_affinity",
"value": "geography"
}
],
"isDeleted": [
{
"id": "196b8bbd-1c1e-4f58-8ab9-9a2b858550f7",
"value": false
}
],
"entityCode": [
{
"id": "1b7e64a6-0b73-40ce-8679-e33b9d0e1fa3",
"value": "ab5368aa-7abc-4f31-b980-7042fb1943e8"
}
]
}
},
"value": {
"e21c09e1-5308-41cd-bf33-ec0f7e1931dc": {
"key": {
"id": "e21c09e1-5308-41cd-bf33-ec0f7e1931dc",
"label": "isChildOf",
"type": "edge",
"inVLabel": "geography",
"outVLabel": "geography",
"inV": "ab5368aa-7abc-4f31-b980-7042fb1943e8",
"outV": "b81636a3-8e21-4ad9-a299-39eed1936a5d",
"properties": {
"hierarchyCollection": "default",
"isDeleted": false
}
},
"value": {
"b81636a3-8e21-4ad9-a299-39eed1936a5d": {
"key": {
"id": "b81636a3-8e21-4ad9-a299-39eed1936a5d",
"label": "geography",
"type": "vertex",
"properties": {
"_affinity": [
{
"id": "b81636a3-8e21-4ad9-a299-39eed1936a5d|_affinity",
"value": "geography"
}
],
"isDeleted": [
{
"id": "e5560c3d-aca6-455a-8184-09f102b7a532",
"value": false
}
],
"entityCode": [
{
"id": "dcec8e42-afad-4cef-8362-614f2591dfe1",
"value": "b81636a3-8e21-4ad9-a299-39eed1936a5d"
}
]
}
},
"value": {}
}
}
}
}
}
}
]
What I need now is not the entire entities, but the three entityCodes only (or, two and two, but one is the same one).
I have tried the following statements:
.select('entityCode'),
.select('id')
.unfold()
.cap('entityCode')
.path().by('entityCode')
but the result is always wrong. Either it is all the Guids in the database, or an empty array, or different kind of exceptions. I am not familiar with the gremlin syntax, so unsure what to try more. Please advise.
I dropped the idea of using the existing query and started from scratch. These two worked:
For the descendants
var query = $"g.V('ab5368aa-7abc-4f31-b980-7042fb1943e8')" +
$".has('_affinity', 'geography')" +
$".inE('isChildOf')" +
$".has('hierarchyCollection', 'default')" +
$".has('isDeleted', false)" +
$".outV()" +
$".emit()" +
$".repeat(inE('isChildOf').has('_affinity', 'geography').has('isDeleted', false).has('hierarchyCollection', 'default').outV())" +
$".values('entityCode')";
And for the ancestors
var query = $"g.V('ab5368aa-7abc-4f31-b980-7042fb1943e8')" +
$".has('_affinity', 'geography')" +
$".outE('isChildOf')" +
$".has('hierarchyCollection', 'default')" +
$".has('isDeleted', false)" +
$".inV()" +
$".has('_affinity', 'geography')" +
$".has('isDeleted', false)" +
$".emit()" +
$".repeat(outE('isChildOf').has('hierarchyCollection', 'default').has('isDeleted', false).inV().has('_affinity', 'geography').has('isDeleted', false))" +
$".values('entityCode')";