Query polymorphic jpa entity using spring data specifications?
Let’s imagine following entities:
Should I use @ManyToMany or @OneToMany for User-Role Relationships?
Many To Many Relationship User.java @Entity @Table(name = “users”) public class User { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = “id”) private Long id; @Column(name = “username”, nullable = false, unique = true) private String username; @Column(name = “password”, nullable = false) private String password; @ManyToMany(cascade = CascadeType.ALL) @JoinTable( name = “user_roles”, joinColumns = { @JoinColumn(name […]
JPA get highest value in column with where condition
I’m using a JpaRepository to access a table in my database. I defined the table through an entity. My goal is, to get the highest value in the wordNumber column. But I also have to distinguish entries by the languageId column. That means that I need a method in my repository, that receives a parameter, which I can use in my query.
SemanticException: Select item at position 1 in select list has no alias when using JPQL subselect
Given Entities:
JPQL how to JOIN FETCH a List with anymatch condition against the List
Given Entities: