Does defaultCaption work in style.grass for relationships?

Neo4j Graph Platform
1

I have the following node styling definition:
node.Vertex {
color: #FFC454;
border-color: #d7a013;
text-color-internal: #2A2C34;
defaultCaption: '{name}';
caption: '{caption}';
}
If I do the equivalent for a relationship, will it work?
Example:
relationship.INHERITANCE {
defaultCaption: "";
caption: "{caption}";
shaft-width: 2px;
color: #F79767;
border-color: #f36924;
text-color-internal: #FFFFFF;
}

If not, why not?

TIA,
Paolo

2

Specifying defaultCaption for the relationship isn't explicitly documented in the documentation, however looking at the parser it seems this should work.

Are you getting the expected result when specifying a defaultCaption value for the relationship? Are you seeing something different? Note that by default relationship captions in Neo4j Browser are the relationship type.

3

Thanks, @lyonwj,
I did look at the documentation you referenced before I posted. But I noted that the defaultCaption was only shown against Nodes. In my dealings with tools over the decades, I've found that unless something is explicitly mentioned, "all bets may be off:. That's why I asked the "cognoscenti".

I asked related to my other topic Are nodes in "db.schema.visualization()" the same as model nodes?regarding the virtual nodes rendered on the db.schema.visualization function. When I asked this question, the schema relationships were blank (where we used defaultCaption), but we've since changed the styling, and the defaultCaption for the nodes also doesn't work there.

Paolo

4

I've done some more testing this morning and found anomalous behaviour.
Here is the relevant style definition:
node.Test {
defaultCaption: "{name}";
caption: "{caption}";
}
merge (z:Test) on match set z.name='Fred', z.caption='Bill' return z
will correctly display "Bill".
match (z:Test) remove z.caption return z
will (incorrectly, in my view) display nothing. I would have thought given the styling definition, it should have reverted to the "{name}" property.
Similarly,
merge (q:Test {name:'Mary'}) return q
will (incorrectly) display a node with nothing in the text area.
merge (q:Test {name:'Mary'}) on match set q.caption='Karen' return q
Will, however, now add the caption "Karen" to the text area.

This smells like a defect to me.
Paolo