Hibernate #Column annotation cannot mapping to database - postgresql

Question

I have a Entity in Spring Boot and PostgreSql, I'm using #Column annotation to mapping to database. This is my Entity snip code :
#Entity(name = "users")
#Table(name = "users", schema = "public")
public class User implements Serializable {
/**
*
*/
private static final long serialVersionUID = 12355345L;
#Id
#Column(name = "user_id")
private String userid;
#Column(name = "user_name")
private Integer username;
When id run and test with postman, i get an error :
org.springframework.dao.InvalidDataAccessResourceUsageException: could
not extract ResultSet; SQL [n/a]; nested exception is
org.hibernate.exception.SQLGrammarException: could not extract
ResultSet
Caused by: org.postgresql.util.PSQLException: ERROR: column users0_.usersid does not exist
Hint: Perhaps you meant to reference the column "users0_.user_id".
I don't know why. How to resolve this ?

Answer 1

There are couple of things for your info.
1) Need to check your spring.jpa.hibernate.ddl-auto property as depends on that property, the database tables, columns will be populated by Hibernate.
2) Next drop the existing table and change the value as spring.jpa.hibernate.hbm2ddl.auto=update so that it will create/update table according to the annotations provided in the entity class
3) Remove unnecessary annotations. Following is enough.
#Entity
#Table(name = "users")
public class User implements Serializable {
#Id
#Column(name = "user_id")
private String userid;
................