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Query for joins in Spring JPA

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1

I have the below entities

@Entity
@Getter
@Setter
public class Aggregate 

 @Id
 @GeneratedValue(strategy = GenerationType.AUTO)
 private Long id;

 @OneToMany(mappedBy = "aggregate")
 private Set<Single> singleSet;


@Entity
@Getter
@Setter
public class Single 

 @Id
 @GeneratedValue(strategy = GenerationType.AUTO)
 private String id;

 private Integer number;

 @ManyToOne
 @JoinColumn(name = "agg_id")
 private Aggregate aggregate;

I also have the below repository

public interface AggregateRepo extends CrudRepository<Aggregate, Long> 

I want to return all associated Single records where number in object Single is equal to some random number

I am assuming that the query will be something like this

public interface AggregateRepo extends CrudRepository<Aggregate, Long> 
 public List<Single> findBySingleSet_Number(Integer number);

However when I try to use Intellij to complete my named query it always populates like this

public interface AggregateRepo extends CrudRepository<Aggregate, Long> 
 public List<Single> findBySingleSet_Empty_Number(Integer number);

I am wondering what the Empty stands for ?

Also should I create another Single repository since the query is related to returning Single records.

spring-data-jpa

share|improve this question

asked Mar 27 at 15:23

RohitRohit

48422 silver badges99 bronze badges

add a comment | 

1

I have the below entities

@Entity
@Getter
@Setter
public class Aggregate 

 @Id
 @GeneratedValue(strategy = GenerationType.AUTO)
 private Long id;

 @OneToMany(mappedBy = "aggregate")
 private Set<Single> singleSet;


@Entity
@Getter
@Setter
public class Single 

 @Id
 @GeneratedValue(strategy = GenerationType.AUTO)
 private String id;

 private Integer number;

 @ManyToOne
 @JoinColumn(name = "agg_id")
 private Aggregate aggregate;

I also have the below repository

public interface AggregateRepo extends CrudRepository<Aggregate, Long> 

I want to return all associated Single records where number in object Single is equal to some random number

I am assuming that the query will be something like this

public interface AggregateRepo extends CrudRepository<Aggregate, Long> 
 public List<Single> findBySingleSet_Number(Integer number);

However when I try to use Intellij to complete my named query it always populates like this

public interface AggregateRepo extends CrudRepository<Aggregate, Long> 
 public List<Single> findBySingleSet_Empty_Number(Integer number);

I am wondering what the Empty stands for ?

Also should I create another Single repository since the query is related to returning Single records.

spring-data-jpa

share|improve this question

asked Mar 27 at 15:23

RohitRohit

48422 silver badges99 bronze badges

add a comment | 

I have the below entities

@Entity
@Getter
@Setter
public class Aggregate 

 @Id
 @GeneratedValue(strategy = GenerationType.AUTO)
 private Long id;

 @OneToMany(mappedBy = "aggregate")
 private Set<Single> singleSet;


@Entity
@Getter
@Setter
public class Single 

 @Id
 @GeneratedValue(strategy = GenerationType.AUTO)
 private String id;

 private Integer number;

 @ManyToOne
 @JoinColumn(name = "agg_id")
 private Aggregate aggregate;

I also have the below repository

public interface AggregateRepo extends CrudRepository<Aggregate, Long> 

I want to return all associated Single records where number in object Single is equal to some random number

I am assuming that the query will be something like this

public interface AggregateRepo extends CrudRepository<Aggregate, Long> 
 public List<Single> findBySingleSet_Number(Integer number);

However when I try to use Intellij to complete my named query it always populates like this

public interface AggregateRepo extends CrudRepository<Aggregate, Long> 
 public List<Single> findBySingleSet_Empty_Number(Integer number);

I am wondering what the Empty stands for ?

Also should I create another Single repository since the query is related to returning Single records.

spring-data-jpa

share|improve this question

asked Mar 27 at 15:23

RohitRohit

48422 silver badges99 bronze badges

@Entity
@Getter
@Setter
public class Aggregate 

 @Id
 @GeneratedValue(strategy = GenerationType.AUTO)
 private Long id;

 @OneToMany(mappedBy = "aggregate")
 private Set<Single> singleSet;


@Entity
@Getter
@Setter
public class Single 

 @Id
 @GeneratedValue(strategy = GenerationType.AUTO)
 private String id;

 private Integer number;

 @ManyToOne
 @JoinColumn(name = "agg_id")
 private Aggregate aggregate;

public interface AggregateRepo extends CrudRepository<Aggregate, Long> 

public interface AggregateRepo extends CrudRepository<Aggregate, Long> 
 public List<Single> findBySingleSet_Number(Integer number);

public interface AggregateRepo extends CrudRepository<Aggregate, Long> 
 public List<Single> findBySingleSet_Empty_Number(Integer number);

share|improve this question

asked Mar 27 at 15:23

RohitRohit

48422 silver badges99 bronze badges

share|improve this question

asked Mar 27 at 15:23

RohitRohit

48422 silver badges99 bronze badges

asked Mar 27 at 15:23

RohitRohit

48422 silver badges99 bronze badges

asked Mar 27 at 15:23

RohitRohit

48422 silver badges99 bronze badges