spring boot hibernate query invalid user error

Question

Hi I am new to Spring Boot. I try to connect to Oracle and list related records. My code worked in a stub environment, that is without connecting to a db. When I tried to connec

Answer 1

It seems that the problem is following:

Because of this property:

spring.jpa.properties.hibernate.hbm2ddl.auto = update

And the fact that the Posts entity has been changed to reference the User, Hibernate tries to add a foreign key constraint:

alter table posts add constraint FK6xvn0811tkyo3nfjk2xvqx6ns foreign key (author_id) references users

But gets this error:

ORA-02268: referenced table does not have a primary key

Not sure why hibernate does not add a primary key to this table as the @Id annotation is clearly there.

Try to add a primary key constraint manually to the Users.id column:

ALTER TABLE users
 ADD CONSTRAINT users_pk PRIMARY KEY (id);

Update

The problem might with the Post.data mapping as you are using it in the order by clause.

The doc says:

This annotation must be specified for persistent fields or properties of type java.util.Date and java.util.Calendar. It may only be specified for fields or properties of these types.

As you are using java.util.Date, then you need to add this:

@Temporal(TemporalType.DATE)
private Date date = new Date();