I have a usecase in which certain actions should only be triggered for
specific nodetypes. a nodetype is defined by a *combination* of labels.
The nodetypes for which an "action" should take place is given by a nested
collection of label combinations by something like [["a",
"b"],["a","d","e"]] . There has to be a exact match, so a node with only
label "a" or " b", or a node with :a:b:x should not match.
Now the problem arises when I want to compare the labels(n) with this
collection, because ["a", "b"] is different from ["a", "b"] , and there
seems to be not a specific order in which labels are returned.
The only way I got this working is this
match (n)
WHERE
(ALL (l in labels(n) WHERE l in ['a','b']) AND LENGTH(labels(n))=2)
OR
(ALL (l in labels(n) WHERE l in ['a','d','e']) AND LENGTH(labels(n))=3)
return n.name
If there was a way to predict the order of the labels , i would do this
match (n)
WHERE
REDUCE(acc = '', p IN labels(n)| acc + p + ' ') IN ['a b ','a d e
']
return n.name
Or is there another way?
Best,
Tom
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