G.V() Query syntax error
This query from the reference, fails in gdotv 1.28.62:
V().has('name',not(within('josh','marko'))).elementMap()
With :
"Syntax Error (ln 1:21): Missing Gremlin Step Parameters or closing ')' symbol"
This succeeds:
V().has('name',without('josh','marko')).elementMap()
Equally, g.V().has('name',neq('josh')).elementMap() succeeds, while g.V().has('name',not(eq('josh'))).elementMap() gives an error.
7 Replies
Hey, that's odd, let me investigate, perhaps some kind of problem in the ANTLR grammar for Gremlin in gdotv
Also thanks for reporting this
g.V().has('name',is(eq('josh'))).elementMap()
works, so it seems to be specific to not().
I can help with ANTLR grammars
Hey, much appreciated! Should be all good on this end, gdotv uses a slightly modified version of tinkerpop's which we maintain ourselves
you often have to declare
not() explicitly because it collides with the traversal form. to avoid it getting mixed up you either do P.not(...) or __.not(...). ANTLR might be able to be improved to make the right choice automatically. not sure we can do much with groovy. anyway, i assume being explicit would solve the problem. is that right?g.V().has('name',__.not(eq('josh'))).elementMap()
doesn't help.
g.V().has('name',P.not(eq('josh'))).elementMap()
does.
Guess that closes the issue...
P and __ are two different things. the first produces a Predicate the second produces an anonymous Traversal. for your has() case you need the second. the __.not() step does not take a Predicate as an argument so ,__.not(eq('josh')) is invalid