Mixing
Hibernate mapping of List “Not an entity”
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Hey everyone thank you for reading!
I am using hibernate and JPA to store a class with several annotated values. One of these is this one:
@ElementCollection(fetch = FetchType.EAGER)
@Fetch(value = FetchMode.SUBSELECT)
private List<byte> productThumbnails;
Now I am trying to optimize the database operations to
1) not include the thumbnails in the query. For this I am using a CriteriaQuery with multiselect on all the other fields
criteriaQuery.multiselect(root.get("id"),root.get("userId"), root.get("price"));
2) Only get the thumbnails via the id
CriteriaBuilder cb = getInstance().getCriteriaBuilder();
CriteriaQuery<byte> query = cb.createQuery(byte.class);
Root<Product> product = query.from(Product.class);
query.multiselect(product.get(Product_.productThumbnails));
TypedQuery<byte> typedQuery = getInstance().createQuery(query);
List<byte> resultList = typedQuery.getResultList();
resultList.forEach(System.out::println);
getInstance().close();
For this I also created a static metamodel class:
@StaticMetamodel(Product.class)
public class Product_ {
public static volatile SingularAttribute<Product, Integer> id;
public static volatile ListAttribute<Product, List<byte>> productThumbnails;
}
If I am now running this code, I am getting the following error:
javax.servlet.ServletException: java.lang.IllegalArgumentException: org.hibernate.QueryException: not an entity [select generatedAlias0.productThumbnails from de.adesso.data.Product as generatedAlias0]
Did anyone else run into such a problem? Any help would be greatly appreciated!
Thanks!
java hibernate jpa metamodel
asked Jan 3 at 14:03
user3907491user3907491
100128
add a comment |
Hey everyone thank you for reading!
I am using hibernate and JPA to store a class with several annotated values. One of these is this one:
@ElementCollection(fetch = FetchType.EAGER)
@Fetch(value = FetchMode.SUBSELECT)
private List<byte> productThumbnails;
Now I am trying to optimize the database operations to
1) not include the thumbnails in the query. For this I am using a CriteriaQuery with multiselect on all the other fields
criteriaQuery.multiselect(root.get("id"),root.get("userId"), root.get("price"));
2) Only get the thumbnails via the id
CriteriaBuilder cb = getInstance().getCriteriaBuilder();
CriteriaQuery<byte> query = cb.createQuery(byte.class);
Root<Product> product = query.from(Product.class);
query.multiselect(product.get(Product_.productThumbnails));
TypedQuery<byte> typedQuery = getInstance().createQuery(query);
List<byte> resultList = typedQuery.getResultList();
resultList.forEach(System.out::println);
getInstance().close();
For this I also created a static metamodel class:
@StaticMetamodel(Product.class)
public class Product_ {
public static volatile SingularAttribute<Product, Integer> id;
public static volatile ListAttribute<Product, List<byte>> productThumbnails;
}
If I am now running this code, I am getting the following error:
javax.servlet.ServletException: java.lang.IllegalArgumentException: org.hibernate.QueryException: not an entity [select generatedAlias0.productThumbnails from de.adesso.data.Product as generatedAlias0]
Did anyone else run into such a problem? Any help would be greatly appreciated!
Thanks!
java hibernate jpa metamodel
asked Jan 3 at 14:03
user3907491user3907491
100128
add a comment |
Hey everyone thank you for reading!
I am using hibernate and JPA to store a class with several annotated values. One of these is this one:
@ElementCollection(fetch = FetchType.EAGER)
@Fetch(value = FetchMode.SUBSELECT)
private List<byte> productThumbnails;
Now I am trying to optimize the database operations to
1) not include the thumbnails in the query. For this I am using a CriteriaQuery with multiselect on all the other fields
criteriaQuery.multiselect(root.get("id"),root.get("userId"), root.get("price"));
2) Only get the thumbnails via the id
CriteriaBuilder cb = getInstance().getCriteriaBuilder();
CriteriaQuery<byte> query = cb.createQuery(byte.class);
Root<Product> product = query.from(Product.class);
query.multiselect(product.get(Product_.productThumbnails));
TypedQuery<byte> typedQuery = getInstance().createQuery(query);
List<byte> resultList = typedQuery.getResultList();
resultList.forEach(System.out::println);
getInstance().close();
For this I also created a static metamodel class:
@StaticMetamodel(Product.class)
public class Product_ {
public static volatile SingularAttribute<Product, Integer> id;
public static volatile ListAttribute<Product, List<byte>> productThumbnails;
}
If I am now running this code, I am getting the following error:
javax.servlet.ServletException: java.lang.IllegalArgumentException: org.hibernate.QueryException: not an entity [select generatedAlias0.productThumbnails from de.adesso.data.Product as generatedAlias0]
Did anyone else run into such a problem? Any help would be greatly appreciated!
Thanks!
java hibernate jpa metamodel
asked Jan 3 at 14:03
user3907491user3907491
100128
Hey everyone thank you for reading!
I am using hibernate and JPA to store a class with several annotated values. One of these is this one:
@ElementCollection(fetch = FetchType.EAGER)
@Fetch(value = FetchMode.SUBSELECT)
private List<byte> productThumbnails;
Now I am trying to optimize the database operations to
1) not include the thumbnails in the query. For this I am using a CriteriaQuery with multiselect on all the other fields
criteriaQuery.multiselect(root.get("id"),root.get("userId"), root.get("price"));
2) Only get the thumbnails via the id
CriteriaBuilder cb = getInstance().getCriteriaBuilder();
CriteriaQuery<byte> query = cb.createQuery(byte.class);
Root<Product> product = query.from(Product.class);
query.multiselect(product.get(Product_.productThumbnails));
TypedQuery<byte> typedQuery = getInstance().createQuery(query);
List<byte> resultList = typedQuery.getResultList();
resultList.forEach(System.out::println);
getInstance().close();
For this I also created a static metamodel class:
@StaticMetamodel(Product.class)
public class Product_ {
public static volatile SingularAttribute<Product, Integer> id;
public static volatile ListAttribute<Product, List<byte>> productThumbnails;
}
If I am now running this code, I am getting the following error:
javax.servlet.ServletException: java.lang.IllegalArgumentException: org.hibernate.QueryException: not an entity [select generatedAlias0.productThumbnails from de.adesso.data.Product as generatedAlias0]
Did anyone else run into such a problem? Any help would be greatly appreciated!
Thanks!
java hibernate jpa metamodel
java hibernate jpa metamodel
asked Jan 3 at 14:03
user3907491user3907491
100128
asked Jan 3 at 14:03
user3907491user3907491
100128
asked Jan 3 at 14:03
user3907491user3907491
100128
asked Jan 3 at 14:03
user3907491user3907491
100128
asked Jan 3 at 14:03
user3907491user3907491
100128
100128
add a comment |
add a comment |
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