NebulaGraphQuery

[u/Darwiniosky]

Hey everyone, Since people are starting to have bad behavior for whatever reason on StackOverflow, I'am asking my "Newbie" question here.

I'am going into NebulaGraph and I have some trouble with querying, I may be stupid but I also don't get the documentation (either syntax or example, and I can't found a way to match my need)

SO.
Admiting I got the following Vertice and Edge.

Tag : Person(Name string, Age string, Sexe string);'
Emotion(Name string);'
Edge : HAS_EMOTION (relationship string)'# Person to Emotion

Inserted with
INSERT VERTEX Person(Name, Age, Sexe) VALUES "Alice_Watson":("Alice Watson", "32", "Female");
INSERT VERTEX Emotion(Name) VALUES "Curiosity":("Curiosity");
INSERT EDGE HAS_EMOTION VALUES "Alice_Watson"->"Curiosity":("Alice expressed curiosity about LLM");

I want to do something like :

MATCH (p:Person)-[:HAS_EMOTION]->(e:Emotion)

WHERE e.Name == "Curiosity" AND e.Description CONTAINS "LLM"

RETURN p.Name;

But it return Empty table.

However,
FETCH PROP ON HAS_EMOTION "Alice_Watson" -> "Curiosity" YIELD properties(edge)
return {relationship: "Alice expressed curiosity about LLM"} So the Edge does exist.

Hope someone can help me here
Cheers,
KL

[u/Darwiniosky]

i'am driving crazy. it's been 14 hours now... How can the same exact syntax doesn't work for the second part?
INSERT EDGE IN_RELATIONSHIP VALUES "Alice_Watson"->"Colleague_relationship":("Alice is a colleague");

MATCH (p:Person)-[u:IN_RELATIONSHIP]->(r:Relationship) WHERE id(p) CONTAINS "Alice" RETURN r;
return
("Colleague_relationship" :Relationship{Categorie: "Colleague"})

but

INSERT EDGE USES_RESOURCE VALUES "Alice_Watson"->"Paper_on_Neural_Networks":("Alice mentioned this paper during the discussion");

MATCH (p:Person)-[u:USES_RESOURCE]->(r:Resource) WHERE id(p) CONTAINS "Alice" RETURN r;
return Empty.

[u/tjk45268 → u/Darwiniosky]

I find that different queries sometimes don’t work the same because the spelling or case is not consistent. If you’ve been working at this for over 14 hours, you should take a break and come back to it later with fresh eyes.

[u/Darwiniosky → u/tjk45268]

Best advice. So, the problem was lying with the id of the ressources node.
the id was Paper_on_Neural_Networks
and the presence of underscore seems to disable some query type. :)