Good point, I should check the same thing in the java-rest-binding. Michael
Am 20.01.2014 um 16:33 schrieb Gwendal Mousset <[email protected]>: > Hi, > > Michael, your patch works well with embedded database but not with neo4j > server. > Thanks for your help > > Gwendal > > On Friday, January 10, 2014 10:23:27 AM UTC+1, Gwendal Mousset wrote: > Thank you very much Michael for your work and your reactivity ! > > On Friday, January 10, 2014 9:26:46 AM UTC+1, Michael Hunger wrote: > Hi, > > its a bug in SDN, I fixed it here, in case you want to patch locally. > > https://github.com/spring-projects/spring-data-neo4j/blob/master/spring-data-neo4j/src/main/java/org/springframework/data/neo4j/support/conversion/ResultColumnValueExtractor.java#L75 > > if (returnType.isCollectionLike()) { > QueryResultBuilder qrb = new > QueryResultBuilder((Iterable)columnValue, converter); > return > qrb.to(returnType.getActualType().getType()).as(returnType.getType()); > } else > return converter.convert(columnValue, returnType.getType(), > mappingPolicy); > } > > It will be part of the next release, thanks again for reporting it. > > Cheers > > Michael > > Am 09.01.2014 um 09:13 schrieb Gwendal Mousset <[email protected]>: > >> A precision i missed, the exception is not thrown when i execute the request >> but when i try accessing to Iterable<CategoryDAO> getSubCategories(). >> >> >> On Wednesday, January 8, 2014 1:47:18 PM UTC+1, Gwendal Mousset wrote: >> Hello, >> >> I have an issue with cypher request using collect() function. >> I'm using spring-data-neo4j 3.0.0-M1 and Neo4j 2.0.0-M06. >> >> In my data model i have Category nodes. >> Each category can have subcategories. >> I want to retrieve the top categories list with the associated subcategories. >> >> Categ3 -- IS_SUBCATEGORY_OF --> Categ1 <-- IS_SUBCATEGORY_OF -- Categ2 >> >> My request: >> >> MATCH (cat:Category) >> WITH cat >> MATCH (cat)<-[?:IS_SUBCATEGORY_OF]-(subCat:Category) >> WHERE NOT cat-[:IS_SUBCATEGORY_OF]->() >> RETURN cat as category, collect(subCat) as subCategories >> >> >> The query result is exactly what i expect in the console: >> >> +--------------------------------------------------------------------------------------------------------------------------------------------------------+ >> | category | subCategories >> | >> +--------------------------------------------------------------------------------------------------------------------------------------------------------+ >> | Node[128]{id:"e9c27555f46c4acdb29c8d0e89814467"} | [] >> | >> | Node[176]{id:"78f7c907068c4e1abd018fe560c2c03a"} | [] >> | >> | Node[134]{id:"e362b9c05a8f41f0aee877f914f2658f"} | [] >> | >> | Node[136]{id:"7b3d58a89ebd4010964004d58e962526"} | [] >> | >> | Node[118]{id:"3378af0b1f54405fb7ab2970cba5bff3"} | >> [Node[34]{id:"d10cc4418c914c1281f7183da8109a4f"},Node[46]{id:"b3012831db924c22829a0335df2e90d1"}] >> | >> | Node[130]{id:"e3e290b4d2c648b3a6a7d0fe8da461ef"} | [] >> | >> | Node[138]{id:"eb828c120cb248c2a5baa92734e39b91"} | [] >> | >> | Node[132]{id:"057aeb6913474454a329571b9a266305"} | [] >> | >> | Node[126]{id:"2671039fa6f24f5b806df682c238d1c4"} | >> [Node[120]{id:"48bc7f2b34db49bfb40936864a7a4a80"},Node[122]{id:"373d94527286482fb8c807aee90d7f5e"}] >> | >> +--------------------------------------------------------------------------------------------------------------------------------------------------------+ >> >> >> My QueryResult interface: >> >> @QueryResult >> public interface CategoryWithSubCategories { >> >> >> /** >> * >> * @return A category. >> */ >> @ResultColumn("category") >> CategoryDAO getCategory(); >> >> /** >> * >> * @return The subcategories. >> */ >> @ResultColumn("subCategories") >> Iterable<CategoryDAO> getSubCategories(); >> } >> >> My Query: >> >> @Query("MATCH (cat:Category) " >> + "WITH cat " >> + "MATCH (cat)<-[?:IS_SUBCATEGORY_OF]-(subCat:Category) " >> + "WHERE NOT cat-[:IS_SUBCATEGORY_OF]->() " >> + "RETURN distinct cat as category, collect(subCat) as subCategories") >> Iterable<CategoryDAO> getAll(); >> >> When i call this method, i get an exception: >> >> java.lang.RuntimeException: Cannot extract single value from Iterable with >> more than one elements. >> at >> org.springframework.data.neo4j.conversion.DefaultConverter.extractSingle(DefaultConverter.java:60) >> at >> org.springframework.data.neo4j.conversion.DefaultConverter.extractValue(DefaultConverter.java:51) >> at >> org.springframework.data.neo4j.conversion.DefaultConverter.convert(DefaultConverter.java:40) >> at >> org.springframework.data.neo4j.support.conversion.EntityResultConverter.convert(EntityResultConverter.java:165) >> at >> org.springframework.data.neo4j.conversion.DefaultConverter.convert(DefaultConverter.java:36) >> at >> org.springframework.data.neo4j.rest.SpringRestGraphDatabase$SpringResultConverter.convert(SpringRestGraphDatabase.java:148) >> at >> org.neo4j.rest.graphdb.util.QueryResultBuilder$1$1.underlyingObjectToObject(QueryResultBuilder.java:98) >> at >> org.neo4j.helpers.collection.IteratorWrapper.next(IteratorWrapper.java:47) >> ... >> ... >> >> >> I think my code is quite similar with the exemple in documentation at >> http://docs.spring.io/spring-data/data-neo4j/docs/3.0.0.M1/reference/htmlsingle/#reference_programming-model_mapresult >> >> Please could you tell me what i'm doing wrong ? >> >> Tank you >> >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Neo4j" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/groups/opt_out. > > > -- > You received this message because you are subscribed to the Google Groups > "Neo4j" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups "Neo4j" group. 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