问题
My vertice properties partly contain objects like e.g. a File object. When searching with "has" I would like to search for Files by path. I think some kind of text comparison predicates that would do the "toString()" conversion might be helpful here.
Are there any standard predicates like this in gremlin/tinkerpop or do I have to implement these my self?
I found two related questions in stackoverflow:
- Gremlin.net textContains equivalent
- How Gremlin query same sql like for search feature
And one of them I answered today with a pointer to the SimpleGraph project's RegexPredicate implementation https://github.com/BITPlan/com.bitplan.simplegraph/blob/master/simplegraph-core/src/main/java/com/bitplan/gremlin/RegexPredicate.java (I am one of the committer of that project)
Currently I'd proceed by adding more helper Predicates like that to the library.
回答1:
For now you should add your own predicates for text comparisons. TinkerPop has had discussion in the past about adding such support, but no consensus has been achieved on a direction to take.
来源：https://stackoverflow.com/questions/50314987/gremlin-text-comparison-predicates