如何使用 spring 数据 neo4j 将给定的 label 添加到给定节点？

Question

I use the spring data neo4j @query to add a label to a node, but there are some syntaxes. How can I transfer param correctly?

Such as:

@Query("MATCH (st) WHERE st.originId = $originId SET st:$label RETURN st")  
public Node addLabel(String originId, String label);

@Query("MATCH (st) WHERE st.originId = $originId SET st:label RETURN st") 
public Node addLabel(String originId, @Param("label") String label);

@Query("MATCH (st) WHERE st.originId = $originId SET st:$1 RETURN st")
public Node addLabel(String originId, String label);

All of the above statements have errors.The compiler told me there was an error in ':'.

So, What's the correct statements?

Answer 1

At the moment, cypher does not support assigning dynamic node labels. You will need to use the APOC library:

MATCH (st) WHERE st.originId = $originId
CALL apoc.create.addLabels( [st], [$label​]) YIELD node
RETURN distinct 'done'