I have three tables. parent parent_child_mapping child I want to join the 3 tables & filter by child name using ‘CriteriaBuilder’ & ‘Predicate’. How can i implement the below sql query using ‘CriteriaBuilder’ & ‘Predicate’. Parent entity Parent child…
Tag: hibernate
It’s possible to use JsonIgnore when my lazily initialize is failed?
I search one way to use JsonIgnore (or just return an empty array) when my assotiation variable with fetch = FetchType.LAZY isn’t initialize and use my own serializer when it is. I tryed to do test in …
Is it possibe to map a query with nested select statements to a DTO?
I have a query with nested select There is a DTO Class The method of new packageName.Result(a,b) in the query wont work here because of nested select, so what can be done here? Thanks in advance Answer The JPQL constructor expression is really just syntax sugar, so you could just as well transform the resulti…
Difference between connecting to a database using DriverManager and SpringBoot(Hibernate)
There are 2 ways to connect to a database when developing Java apps. Using DriverManager Connection conn = DriverManager.getConnection(url, name, password); // execute the query. Using application property file in SpringBoot spring.jpa.hibernate.ddl-auto=none spring.datasource.url=jdbc:mysql://localhost:5432/…
how to resolve Joda date/time type `org.joda.time.DateTime` not supported by default
I have an existing web-app and unfortunately the ‘time’ fields in the DB are not converted to zulu time. Instead we are using org.joda.time.DateTime as our datetime and timezone encapsulator. I am in the process of updating from hibernate 4.3.7.Final to 5.3.20.Final Also, we are letting hibernate …
JPA : Re-use Id generated from a sequence for a new version of the same object having composite PK (ID + VERSION)
I have entity A with composite PK [ id(generated from sequence) + version ]. For a brand new record I want to pick the id from a sequence defined in the DB side. Lets say its created like below Next time, I want a new version of the same Id to be created like below Note : in the second
Hibernate – Error accessing stax stream – with hibernate.properties
I’m getting this error : INFO: HHH000205: Loaded properties from resource hibernate.properties: {hibernate.connection.driver_class=oracle.jdbc.driver.OracleDriver, hibernate.dialect=org.hibernate.dialect.Oracle8iDialect, hibernate.connection.password=****, hibernate.connection.username=myUserName, hiber…
Saving new entity with JPARepository throws InvalidDataAccessResourceUsageException: could not extract ResultSet
Currently working on a REST API with Springboot + JPA/Hibernate + Oracle. I have an entity called Foo linked to a Bar entity with @ManyToOne (Mulitple Foo can have one Bar). When I send an HTTPS GET to get all Foos, everything works fine. The problem is when I try to send a POST request to create a new Foo.
JPA duplicate entries on child when update parent several times
I am building the Rest API with Java, Spring Boot, Hibernate and JPA. I have 2 tables Users and Friends, where User will have an array of Friend. My client will send several update request on my User table. This the request the API will receive : If my client send this request, my API returns : This answer is
In which direction Hibernate orm-mapping works
I have a rather simple (probably) question, but somehow struggling to find an answer. How does hibernate map nested entities to java objects? Does it starts its mapping from high-level entities and stops on encountering null-values in ResultSet, or it starts from the lowest-level entities and check all of the…