getOrCreate for java-rest-api neo4j fails -


i have simple relationship test trying run create unique node using rest api (java-rest-binding) https://github.com/neo4j/java-rest-binding unfortunately stuck on something, here details: (the non-unique node , relationship works fine, doesn't, doing naive (pardon lack on knowledge of neo4j).

final usermodel usermodel = new usermodel();         final hashmap<string, object> umodelattributes = new hashmap<string, object>(0);         umodelattributes.put("name", "anirudhvyas");         usermodel.setattributes(umodelattributes);         final hashset<action> buyhistory = new hashset<action>();         final action buyaction = new action();         final productmodel productmodel = new productmodel();         final hashmap<string, object> attributes = new hashmap<string, object>(0);         attributes.put("name", "mercedes benz ");         attributes.put("make", "mercedes benz");         attributes.put("model", "sls 550");         attributes.put("year", "2014");         productmodel.setattributes(attributes);         buyaction.setproduct(productmodel);         buyhistory.add(buyaction);         usermodel.setbuyhistory(buyhistory);         system.out.println("before");         new usermodeldao().createcompletetree(usermodel);         system.out.println("completed >>>

if use on dao:

final restnode root = api.getorcreatenode(api.index().fornodes("users", maputil.stringmap(indexmanager.provider, "lucene", "type", "fulltext")), "name", m                     .getattributes().get("name"), m.getattributes());  api.getorcreatenode(api.index().fornodes("products", maputil.stringmap(indexmanager.provider, "lucene", "type", "fulltext")), "name", buyaction.getproduct().getattributes().get("name"), buyaction.getproduct().getattributes()), relationshiptypes.bought);

this fails with:

   java.lang.runtimeexception: error retrieving or creating node key name , value anirudhvyas index users         @ org.neo4j.rest.graphdb.executingrestapi.getorcreatenode(executingrestapi.java:448)         @ org.neo4j.rest.graphdb.restapifacade.getorcreatenode(restapifacade.java:223)         @ xxxx.xxxx.xxxx.graph.usermodelcreatetastekeyneo4jbatchcallback.recordbatch(usermodelcreatetastekeyneo4jbatchcallback.java:61)

there several ways it, 1 of them using cypher:

match a.name! = 'nametofound' create unique a-[:relationship]-c:label return c

use inside queryengine. works charm, please @ following link more details: http://docs.neo4j.org/chunked/milestone/query-create-unique.html

java code here:

protected static restnode createorgetexistingnode(string key, string valuefor, string rel, string label){     restnode node = null;     final queryresult<map<string, object>> result = graphrestservice.queryengine.query(string.format("match node node.%s! ='%s' " +             "create unique node-[:%s]-c:%s return c" , key, valuefor, rel, label), maputil.map("reference", 0));     (map<string, object> column : result) {         node = (restnode) column.get("c");     }     return node; }

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