Trying to insert Json into Neo4j - spring

Question

Everyone I am new to neo4j and I am trying to enter Json into Neo4j but I am getting Match statement instead of create. Earlier I tried something myself and when When I inserted Json message only as
{"name":"john","dept":"Science"}
it went without a glitch but everytime I want try to add numeric data it gets error.
2020-03-10 13:21:59.793 INFO 94817 --- [ntainer#0-0-C-1] o.n.o.drivers.http.request.HttpRequest : Thread:
29, url: http://localhost:7474/db/data/transaction/92, request: {"statements":[{"statement":"UNWIND {rows}
as row **MATCH** (n) WHERE ID(n)=row.nodeId SET n:`UsersInfo` SET n += row.props RETURN row.nodeId as ref,
ID(n) as id, {type} as type","parameters":{"type":"node","rows":[{"nodeId":23,"props":{"name":"raj",
"dept":"science","age":11}}]},"resultDataContents":["row"],"includeStats":false}]}
These are my classes
KafkaConfiguration
#EnableKafka
#Configuration
public class KafkaConfiguration {
#Bean
public ConsumerFactory<String, Users> userConsumerFactory(){
Map<String, Object> config = new HashMap<>();
config.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, "127.0.0.1:9092");
config.put(ConsumerConfig.GROUP_ID_CONFIG, "group_json");
config.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
config.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, JsonDeserializer.class);
return new DefaultKafkaConsumerFactory<>(config, new StringDeserializer(),
new JsonDeserializer<>(Users.class));
}
#Bean
public ConcurrentKafkaListenerContainerFactory<String, Users> kafkaListenerContainerFactory() {
ConcurrentKafkaListenerContainerFactory<String, Users> factory = new ConcurrentKafkaListenerContainerFactory<>();
factory.setConsumerFactory(userConsumerFactory());
return factory;
}
}
KafkaConsumer class
Service
public class KafkaConsumer {
#Autowired
public Neo4jservice neo4jService;
#KafkaListener(topics = "UsersJson", groupId = "group_id", containerFactory = "kafkaListenerContainerFactory")
public void consume(Users users) {
System.out.println("Consumed message: " + users);
UsersInfo usern = new UsersInfo();
usern.setAge(users.getAge());
usern.setDept(users.getDept());
usern.setId(users.getId());
usern.setName(users.getName());
neo4jService.saveIntoStudentsTable(usern);
}
}
Neo4jService
#Service
public class Neo4jservice {
#Autowired
private UsersRepo userRepo;
public UsersInfo saveIntoStudentsTable(UsersInfo users) {
UsersInfo usern = userRepo.save(users);
return (usern);
}
}
UsersRepo
#Repository
public interface UsersRepo extends Neo4jRepository<UsersInfo, Long>{
}
Users class
public class Users {
private Long id;
private String name;
private String dept;
private Integer age;
**getters,setters and toString method here**
}
Likewise UsersInfo class
#NodeEntity
public class Users {
#Id
private Long id;
private String name;
private String dept;
private Integer age;
**getters,setters and toString method here**
}
Any help will be greatly appreciated. Thanks

Answer 1

You are setting also the id value of the User class.
This will make Spring Data Neo4j and the Neo4j Object Graph Mapper that is used for the persistence think that the entity already exists.
In this case it will MATCH on an existing id(n) and update the properties as you can see in the logs instead of CREATE a new node.