#Repository
public interface LoginDao extends JpaRepository<LoginEntity, Integer> { //}, LoginDaoCustom {
LoginEntity findByLogin(String login);
#Modifying
int changePassword(String password, String login);
}
If I change the return value of the changePassword to anything other than int, I get the error below.
Caused by: java.lang.IllegalArgumentException: Modifying queries can only use void or int/Integer as return type!
at org.springframework.util.Assert.isTrue(Assert.java:65)
at org.springframework.data.jpa.repository.query.JpaQueryExecution$ModifyingExecution.<init>(JpaQueryExecution.java:166)
at org.springframework.data.jpa.repository.query.AbstractJpaQuery.getExecution(AbstractJpaQuery.java:106)
at org.springframework.data.jpa.repository.query.AbstractJpaQuery.execute(AbstractJpaQuery.java:86)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:337)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:96)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:260)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:155)
... 46 more
What does this integer return value mean ? I am sure spring has it documented somewhere, but I can't find it. It is not listed in the jpa.modifying-queries
I should add that if do declare the return type as int, the update fails silently and values aren't updated.
The int/Integer return value is the number of rows that where updated in the database.
Related
How can I make spring-data-jpa return a String column only, instead of a bean?
The following should return the bookingNumber String from a Booking #Entity:
public interface BookingRepository extends CrudRepository<Booking, Long> {
String findDistinctBookingNumberByLastname(String lastname);
}
If the booking exists, I'm getting the following exception instead of the bookingnumber string only:
java.lang.ClassCastException: class Booking cannot be cast to class java.lang.String
at com.sun.proxy.$Proxy198.findDistinctBookingNumberByLastname(Unknown Source) ~[?:?]
Sidenote: I know I could write a native #Query on the interface methods, but I'd prefer a query by method name only.
I made a #NamedNativeQuery and attached it to an entity 'Doctor', on the same entity I attached a #SqlResultSetMapping which takes the columns of the query's result and maps them to a constructor of a specifically made POJO class. This query is also connected to a JPA method, which resides in the repository of the same entity.
However I keep getting an error that the appropriate constructor could not be located, as if the #SqlResultSetMapping or the POJO constructors are not in sync. (stack trace is at the bottom)
My entity, #NamedNativeQuery and #SqlResultSetMapping:
I tried the query directly on the DB and it gave the expected result, so I am just writing the select clause
#Entity
#NamedNativeQuery(
name =
"Doctor.findFreeExaminationTimes", // name of the JPA method in entity's repository (definition below)
query =
"SELECT on_date AS onDate, LAG(to_time, 1, '00:00') OVER mojWindow AS fromTime, from_time AS toTime " +
"...",
resultSetMapping = "freeTimesByDoctorId" // name of the mapping below
)
#SqlResultSetMapping(
name = "freeTimesByDoctorId", // result set mapping name
classes = #ConstructorResult(
targetClass = DoctorAvailabilityResponse.class, // my POJO class (definition below)
columns = { // order and types are the same as in the select clause above and the POJO constructor below
#ColumnResult(name = "onDate", type = java.sql.Date.class),
#ColumnResult(name = "fromTime", type = java.sql.Time.class),
#ColumnResult(name = "toTime",type = java.sql.Time.class)
}
)
)
public class Doctor extends User {...}
The POJO class which I mention in the #ConstructorResult under 'targetClass' has a constructor with the exact order, number and type, of arguments, specified under 'columns'
My POJO class which should be mapped to the query's result:
public class DoctorAvailabilityResponse {
final private java.sql.Date onDate;
final private java.sql.Time fromTime;
final private java.sql.Time toTime;
public DoctorAvailabilityResponse(java.sql.Date onDate, java.sql.Time fromTime, java.sql.Time toTime) {
this.onDate = onDate;
this.fromTime = fromTime;
this.toTime = toTime;
}
// getters
}
My repository:
#RepositoryRestResource
public interface DoctorRepository extends UserRepository<Doctor> {
// JPA method mapped to the named native query above
List<DoctorAvailabilityResponse> findFreeExaminationTimes(#Param("doctorId") Long doctorId);
}
However when testing this JPA method I get an exception with the message 'could not locate appropriate constructor'.
My test:
#SpringBootTest
public class DoctorTests {
#Autowired
private DoctorRepository doctorRepository;
private final Logger LOGGER = LoggerFactory.getLogger(this.getClass());
#Test
public void shouldReturnDoctorAvailability() {
// Exception thrown here
List<DoctorAvailabilityResponse> freeTimes = doctorRepository.findFreeExaminationTimes(4L);
LOGGER.info(freeTimes.toString());
}
}
I cannot understand why is this happening. Is there a way to manually map this result set to the POJO while maintaining the JPA repository method?
Stack trace:
org.springframework.dao.InvalidDataAccessApiUsageException: Could not locate appropriate constructor on class : com.example.isaproj.isa_projekat_2019.Model.DTO.DoctorAvailabilityResponse; nested exception is java.lang.IllegalArgumentException: Could not locate appropriate constructor on class : com.example.isaproj.isa_projekat_2019.Model.DTO.DoctorAvailabilityResponse
at org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExceptionIfPossible(EntityManagerFactoryUtils.java:374)
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:256)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:528)
...
...
Caused by: java.lang.IllegalArgumentException: Could not locate appropriate constructor on class : com.example.isaproj.isa_projekat_2019.Model.DTO.DoctorAvailabilityResponse
at org.hibernate.loader.custom.ConstructorResultColumnProcessor.resolveConstructor(ConstructorResultColumnProcessor.java:92)
at org.hibernate.loader.custom.ConstructorResultColumnProcessor.performDiscovery(ConstructorResultColumnProcessor.java:45)
at org.hibernate.loader.custom.CustomLoader.autoDiscoverTypes(CustomLoader.java:494)
at org.hibernate.loader.Loader.processResultSet(Loader.java:2333)
at org.hibernate.loader.Loader.getResultSet(Loader.java:2289)
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:2045)
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:2007)
at org.hibernate.loader.Loader.doQuery(Loader.java:953)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:354)
at org.hibernate.loader.Loader.doList(Loader.java:2810)
at org.hibernate.loader.Loader.doList(Loader.java:2792)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2624)
at org.hibernate.loader.Loader.list(Loader.java:2619)
at org.hibernate.loader.custom.CustomLoader.list(CustomLoader.java:338)
at org.hibernate.internal.SessionImpl.listCustomQuery(SessionImpl.java:2137)
at org.hibernate.internal.AbstractSharedSessionContract.list(AbstractSharedSessionContract.java:1134)
at org.hibernate.query.internal.NativeQueryImpl.doList(NativeQueryImpl.java:173)
at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1526)
at org.hibernate.query.Query.getResultList(Query.java:165)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.springframework.orm.jpa.SharedEntityManagerCreator$DeferredQueryInvocationHandler.invoke(SharedEntityManagerCreator.java:409)
at com.sun.proxy.$Proxy212.getResultList(Unknown Source)
at org.springframework.data.jpa.repository.query.JpaQueryExecution$CollectionExecution.doExecute(JpaQueryExecution.java:126)
at org.springframework.data.jpa.repository.query.JpaQueryExecution.execute(JpaQueryExecution.java:88)
at org.springframework.data.jpa.repository.query.AbstractJpaQuery.doExecute(AbstractJpaQuery.java:154)
at org.springframework.data.jpa.repository.query.AbstractJpaQuery.execute(AbstractJpaQuery.java:142)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:618)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:605)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:353)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:99)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139)
... 73 more
Sanity check and alternative approach
To make a sanity check I deleted the #SqlResultSetMapping, in which case the query is supposed to return a list of 'Object[]' values, and then I tested each individual value in that array to check its type, it showed me that the types are what I assumed them to be 'java.sql.Date' and 'java.sql.Time' twice, and all three of them were in the expected order, (Date, Time, Time), which matches the order of the constructor parameters of my POJO class.
My entity and namedNativeQuery:
#Entity
#NamedNativeQuery(
name =
"Doctor.findFreeExaminationTimes",
query =
"SELECT on_date AS onDate, LAG(to_time, 1, '00:00') OVER mojWindow AS fromTime, from_time AS toTime " +
"..."
)
public class Doctor extends User {...}
My repository with a new return type:
#RepositoryRestResource
public interface DoctorRepository extends UserRepository<Doctor> {
List<Object[]> findFreeExaminationTimes(#Param("doctorId") Long doctorId);
}
My test:
#SpringBootTest
public class DoctorTests {
#Autowired
private DoctorRepository doctorRepository;
private final Logger LOGGER = LoggerFactory.getLogger(this.getClass());
#Test
public void shouldReturnDoctorAvailability() {
// Exception thrown here
List<DoctorAvailabilityResponse> freeTimes = doctorRepository.findFreeExaminationTimes(4L);
freeTimes.stream().forEach((ft) -> {
// Values are in expected order and of expected types
String classNameOnDate = ft[0].getClass().toString(); // java.sql.Date
String classNameFromTime = ft[1].getClass().toString(); // java.sql.Time
String classNameToTime = ft[1].getClass().toString(); // java.sql.Time
// I suppose the mapping mechanism is supposed to do something like this, but fails for some reason
DoctorAvailabilityResponse dar = new DoctorAvailabilityResponse((Date)ft[0], (Time)ft[1], (Time)ft[2]);
});
LOGGER.info(freeTimes.toString());
}
}
Running this test works perfectly which supposedly shows that the problem is in the #SqlResultSetMapping or in POJO class.
I would appreciate any feedback. Thanks!
SOLUTION
I had to change the types in the #SqlResultSetMapping and in the constructor of my POJO class.
Changed #SqlResultSetMapping
#SqlResultSetMapping(
name = "freeTimesByDoctorId",
classes = #ConstructorResult(
targetClass = DoctorAvailabilityResponse.class,
columns = {
#ColumnResult(name = "onDate", type = String.class),
#ColumnResult(name = "fromTime", type = String.class),
#ColumnResult(name = "toTime",type = String.class)
}
)
)
Changed POJO class constructor
public DoctorAvailabilityResponse(String onDate, String fromTime, String toTime) {
this.onDate = Date.valueOf(onDate);
this.fromTime = Time.valueOf(fromTime);
this.toTime = Time.valueOf(toTime);
}
This alone did not solve my problem however as I got a hibernate exception as mentioned and solved in this SO question. According to this answer I also changed my repository and added an additional annotation.
Changed repository
#RepositoryRestResource
public interface DoctorRepository extends UserRepository<Doctor> {
#Query(nativeQuery = true) // This is added
List<DoctorAvailabilityResponse> findFreeExaminationTimes(#Param("doctorId") Long doctorId);
}
Now everything works, though the question remains why didn't #SqlResultSetMapping map java.sql.* types to the constructor in the first place.
#ConstructorResult does not work very well with java.sql.Date.class or java.sql.Time.class type. A way to fix your issue is to use String.class instead and then convert the String values to Date/Time in DoctorAvailabilityResponse's constructor
I would like to store my entities in Redis with a UUID key:
#RedisHash("order")
public class Order {
#Id
private UUID id;
...
}
However, I get the following exception with this setup:
org.springframework.core.convert.ConverterNotFoundException: No converter found capable of converting from type [java.util.UUID] to type [byte[]]
at org.springframework.core.convert.support.GenericConversionService.handleConverterNotFound(GenericConversionService.java:321) ~[spring-core-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:194) ~[spring-core-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:174) ~[spring-core-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.springframework.data.redis.core.convert.MappingRedisConverter.toBytes(MappingRedisConverter.java:948) ~[spring-data-redis-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.data.redis.core.convert.MappingRedisConverter.lambda$writeInternal$2(MappingRedisConverter.java:592) ~[spring-data-redis-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.data.mapping.model.BasicPersistentEntity.doWithProperties(BasicPersistentEntity.java:328) ~[spring-data-commons-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.data.redis.core.convert.MappingRedisConverter.writeInternal(MappingRedisConverter.java:584) ~[spring-data-redis-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.data.redis.core.convert.MappingRedisConverter.write(MappingRedisConverter.java:396) ~[spring-data-redis-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.data.redis.core.convert.MappingRedisConverter.write(MappingRedisConverter.java:122) ~[spring-data-redis-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.data.redis.core.RedisKeyValueAdapter.put(RedisKeyValueAdapter.java:208) ~[spring-data-redis-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.data.keyvalue.core.KeyValueTemplate.lambda$update$1(KeyValueTemplate.java:204) ~[spring-data-keyvalue-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.data.keyvalue.core.KeyValueTemplate.execute(KeyValueTemplate.java:343) ~[spring-data-keyvalue-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.data.keyvalue.core.KeyValueTemplate.update(KeyValueTemplate.java:204) ~[spring-data-keyvalue-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.data.keyvalue.repository.support.SimpleKeyValueRepository.save(SimpleKeyValueRepository.java:103) ~[spring-data-keyvalue-2.0.6.RELEASE.jar:2.0.6.RELEASE]
...
When using String instead of UUID, no such exception appears.
How can I use UUID as ID type?
EDIT:
To be more precise you have to register a CustomConversion bean in your context with the name redisCustomConversions. See this post: Redis - How to configure custom conversions
So in your case it would be something like
#Bean
public CustomConversion redisCustomConversions(){
return new CustomConversions(
Arrays.asList(new UUIDToStringConverter(), new StringToUUIDConverter()))))
}
Original:
I think the easiest way to fix this is to write a type converter for uuid.
Something like a
class UUIDConverter implements Converter<UUID, String>
Or when needed
class UUIDConverter implements Converter<UUID, byte[]>
You have to register this as a bean in your context.
I try to use the LocalTime from Java 8 Date Time API with Spring Data MongoDB. Inserting the document works as expected, but when I try to read the document, I get the following error:
Exception in thread "main" java.lang.IllegalStateException: Failed to execute CommandLineRunner
at org.springframework.boot.SpringApplication.runCommandLineRunners(SpringApplication.java:637)
....
Caused by: org.springframework.data.mapping.model.MappingException: No property null found on entity class java.time.LocalDate to bind constructor parameter to!
at org.springframework.data.mapping.model.PersistentEntityParameterValueProvider.getParameterValue(PersistentEntityParameterValueProvider.java:74)
at org.springframework.data.mapping.model.SpELExpressionParameterValueProvider.getParameterValue(SpELExpressionParameterValueProvider.java:63)
at org.springframework.data.convert.ReflectionEntityInstantiator.createInstance(ReflectionEntityInstantiator.java:71)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:257)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:237)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.readValue(MappingMongoConverter.java:1109)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.access$100(MappingMongoConverter.java:78)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter$MongoDbPropertyValueProvider.getPropertyValue(MappingMongoConverter.java:1058)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.getValueInternal(MappingMongoConverter.java:789)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter$1.doWithPersistentProperty(MappingMongoConverter.java:270)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter$1.doWithPersistentProperty(MappingMongoConverter.java:263)
at org.springframework.data.mapping.model.BasicPersistentEntity.doWithProperties(BasicPersistentEntity.java:261)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:263)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:237)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:201)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:197)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:78)
at org.springframework.data.mongodb.core.MongoTemplate$ReadDbObjectCallback.doWith(MongoTemplate.java:2005)
at org.springframework.data.mongodb.core.MongoTemplate.executeFindMultiInternal(MongoTemplate.java:1699)
at org.springframework.data.mongodb.core.MongoTemplate.doFind(MongoTemplate.java:1522)
at org.springframework.data.mongodb.core.MongoTemplate.doFind(MongoTemplate.java:1506)
at org.springframework.data.mongodb.core.MongoTemplate.find(MongoTemplate.java:532)
at org.springframework.data.mongodb.repository.support.SimpleMongoRepository.findAll(SimpleMongoRepository.java:217)
at org.springframework.data.mongodb.repository.support.SimpleMongoRepository.findAll(SimpleMongoRepository.java:174)
at org.springframework.data.mongodb.repository.support.SimpleMongoRepository.findAll(SimpleMongoRepository.java:44)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:358)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:343)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
at com.sun.proxy.$Proxy28.findAll(Unknown Source)
at hello.Application.run(Application.java:36)
at org.springframework.boot.SpringApplication.runCommandLineRunners(SpringApplication.java:634)
... 5 more
I tried this with the example from the Spring website: http://spring.io/guides/gs/accessing-data-mongodb/
I just changed to Customer to have a birthdate:
package hello;
import org.springframework.data.annotation.Id;
import java.time.LocalDate;
public class Customer {
#Id
private String id;
private String firstName;
private String lastName;
private LocalDate birthDay;
public Customer() {}
public Customer(String firstName, String lastName, LocalDate birthDay) {
this.firstName = firstName;
this.lastName = lastName;
this.birthDay = birthDay;
}
#Override
public String toString() {
return String.format(
"Customer[id=%s, firstName='%s', lastName='%s']",
id, firstName, lastName);
}
}
I wrote this little bit of code for all 4 of these conversion options:
DateToLocalDateTimeConverter
DateToLocalDateConverter
LocalDateTimeToDateConverter
LocalDateToDateConverter
Here is an example
public class DateToLocalDateTimeConverter implements Converter<Date, LocalDateTime> {
#Override
public LocalDateTime convert(Date source) {
return source == null ? null : LocalDateTime.ofInstant(source.toInstant(), ZoneId.systemDefault());
}
}
All example here.
Then by including this in the xml configuration for the mongodb connection I was able to work in java 8 dates with mongodb (remember to add all the converters):
<mongo:mapping-converter>
<mongo:custom-converters>
<mongo:converter>
<bean class="package.DateToLocalDateTimeConverter" />
</mongo:converter>
</mongo:custom-converters>
</mongo:mapping-converter>
Now problem is resolved:
https://jira.spring.io/browse/DATAMONGO-1102
But Spring Data doesn't support ZonedDateTime now, only Local.
This is currently not supported mostly due to the fact that MongoDB doesn't support storing Java 8 date time types right now. I suggest to turn the internal property into a legacy Date one and do the conversions on the API of the domain class (as you would do with Hibernate and JodaTime e.g.).
I'm getting a strange exception when trying to run a simple cypher query. First i'll introduce my code, and then i'll show what cause the exception. So i have the following classes:
A simple class to represent a user profile:
public abstract class Profile extends AbstractEntity {
#Indexed
ProfileType profileType;
#Indexed(indexType = IndexType.FULLTEXT, indexName = "name")
String firstName;
#Indexed(indexType = IndexType.FULLTEXT, indexName = "name")
String lastName;
#Indexed
EyeColor eyeColor;
#Indexed
HairColor hairColor;
#Indexed
Nationality nationality;
#Indexed
int height;
public Profile() {
setProfileType();
}
public Profile(String firstName, String lastName, Nationality nationality, EyeColor eyeColor, HairColor hairColor, int height) {
this();
this.setFirstName(firstName);
this.setLastName(lastName);
this.setNationality(nationality);
this.setHairColor(hairColor);
this.setEyeColor(eyeColor);
this.setHeight(height);
}
/* Getters and Setters */
}
And a simple class, which inherit from Profile, and represents a civilian:
#NodeEntity
public class Civilian extends Profile {
#GraphProperty(propertyType = Long.class)
DateTime dateOfBirth;
#Indexed
boolean missing;
#RelatedTo
#Fetch
Set<Casualty> casualties = new HashSet<Casualty>(); //TODO: design
public Civilian() {
this.profileType = ProfileType.CIVILIAN;
}
public Civilian(String firstName, String lastName, Nationality nationality, EyeColor eyeColor, HairColor hairColor, int height, DateTime dateOfBirth, boolean missing) {
super(firstName, lastName, nationality, eyeColor, hairColor, height);
this.setDateOfBirth(dateOfBirth);
this.setMissing(missing);
}
/* Getters and Setters */
}
So i created the following repository for the Civilian class:
public interface CivilianRepository extends GraphRepository<Civilian> {
#Query("start n=node(*) where n.firstName=~{0} return n")
Page<Civilian> findCiviliansProperties(String firstName, Pageable page);
}
Ok. So i created few Civilian nodes, and populated the graph with them. There are no other nodes in the graph, except for the Civilian nodes. When i run the findCiviliansProperties method, i get the following exception:
Exception in thread "main" org.springframework.dao.InvalidDataAccessResourceUsageException: Error executing statement start n=node(*) where n.firstName=~{0} return n skip 0 limit 10; nested exception is org.springframework.dao.InvalidDataAccessResourceUsageException: Error executing statement start n=node(*) where n.firstName=~{0} return n skip 0 limit 10; nested exception is org.neo4j.cypher.EntityNotFoundException: The property 'firstName' does not exist on Node[0]
at org.springframework.data.neo4j.support.query.CypherQueryEngine.query(CypherQueryEngine.java:52)
at org.springframework.data.neo4j.repository.query.GraphRepositoryQuery.dispatchQuery(GraphRepositoryQuery.java:98)
at org.springframework.data.neo4j.repository.query.GraphRepositoryQuery.execute(GraphRepositoryQuery.java:81)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:312)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:96)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:260)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:155)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at com.sun.proxy.$Proxy33.findCiviliansProperties(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:198)
at com.sun.proxy.$Proxy36.findCiviliansProperties(Unknown Source)
at org.technion.socialrescue.playground.Playground.main(Playground.java:38)
Caused by: org.springframework.dao.InvalidDataAccessResourceUsageException: Error executing statement start n=node(*) where n.firstName=~{0} return n skip 0 limit 10; nested exception is org.neo4j.cypher.EntityNotFoundException: The property 'firstName' does not exist on Node[0]
at org.springframework.data.neo4j.support.query.CypherQueryEngine.parseAndExecuteQuery(CypherQueryEngine.java:63)
at org.springframework.data.neo4j.support.query.CypherQueryEngine.query(CypherQueryEngine.java:49)
... 20 more
Caused by: org.neo4j.cypher.EntityNotFoundException: The property 'firstName' does not exist on Node[0]
at org.neo4j.cypher.internal.commands.expressions.Property.apply(Property.scala:35)
at org.neo4j.cypher.internal.commands.expressions.Property.apply(Property.scala:29)
at org.neo4j.cypher.internal.commands.RegularExpression.isMatch(Predicate.scala:259)
at org.neo4j.cypher.internal.pipes.FilterPipe$$anonfun$createResults$1.apply(FilterPipe.scala:29)
at org.neo4j.cypher.internal.pipes.FilterPipe$$anonfun$createResults$1.apply(FilterPipe.scala:29)
at scala.collection.Iterator$$anon$22.hasNext(Iterator.scala:390)
at scala.collection.Iterator$$anon$19.hasNext(Iterator.scala:334)
at scala.collection.Iterator$class.isEmpty(Iterator.scala:272)
at scala.collection.Iterator$$anon$19.isEmpty(Iterator.scala:333)
at org.neo4j.cypher.internal.pipes.SlicePipe.createResults(SlicePipe.scala:32)
at org.neo4j.cypher.internal.pipes.ColumnFilterPipe.createResults(ColumnFilterPipe.scala:37)
at org.neo4j.cypher.internal.executionplan.ExecutionPlanImpl$$anonfun$6.apply(ExecutionPlanImpl.scala:127)
at org.neo4j.cypher.internal.executionplan.ExecutionPlanImpl$$anonfun$6.apply(ExecutionPlanImpl.scala:125)
at org.neo4j.cypher.internal.executionplan.ExecutionPlanImpl.execute(ExecutionPlanImpl.scala:33)
at org.neo4j.cypher.ExecutionEngine.execute(ExecutionEngine.scala:59)
at org.neo4j.cypher.ExecutionEngine.execute(ExecutionEngine.scala:63)
at org.neo4j.cypher.javacompat.ExecutionEngine.execute(ExecutionEngine.java:79)
at org.springframework.data.neo4j.support.query.CypherQueryEngine.parseAndExecuteQuery(CypherQueryEngine.java:61)
... 21 more
Caused by: org.neo4j.graphdb.NotFoundException: 'firstName' property not found for NodeImpl#0.
at org.neo4j.kernel.impl.core.Primitive.newPropertyNotFoundException(Primitive.java:184)
at org.neo4j.kernel.impl.core.Primitive.getProperty(Primitive.java:179)
at org.neo4j.kernel.impl.core.NodeImpl.getProperty(NodeImpl.java:52)
at org.neo4j.kernel.impl.core.NodeProxy.getProperty(NodeProxy.java:155)
at org.neo4j.cypher.internal.commands.expressions.Property.apply(Property.scala:33)
... 38 more
So the most important thing about this exception is the following line - The property 'firstName' does not exist on Node[0].. But how can it be? there are only Civilian nodes in the graph, and they all have the firstName property. Can it be that the neo4j framework adds some more hidden nodes to my graph which i'm not aware of? Because when i change my query into this:
start n=node(*) where has(n.firstName) AND n.firstName=~{0} return n
Everything works fine...
What is wrong?
Thanks!!
neo4j automatically comes with 1 node when you create a new instance, and that's the reference node. You should delete this.
graphDatabaseService.getNodeById(0).delete()