org.postgresql.util.PSQLException: ERROR: column user0_.id does not exist - Hibernate
Solution
In PostgreSQL you have to specify the name of schema like so :
@Table(name="table_name", schema = "myapp") ^^^^^^^^^^^^^^^^Long Story
you got this error :
org.postgresql.util.PSQLException: ERROR: column user0_.id does not existbecause when you create a database in PostgreSQL, it create a default schema named public, so when you don't specify the name in the Entity then Hibernate will check automatically in the public schema.
Good practices
- Don't use Upper letters in the name of
database,schema,tablesorcolumnsin PostgreSQL. Else you should to escape this names with quotes, and this can cause Syntax errors, so instead you can use :
@Table(name="table_name", schema = "schame_name") ^^^^^^^^^^ ^^^^^^^^^^^- the keyword USER is reserved keyword in PostgreSQL take a look at
+----------+-----------+----------+-----------+---------+| Key Word |PostgreSQL |SQL:2003 | SQL:1999 | SQL-92 |+----------+-----------+----------+-----------+---------+| .... .... .... .... .... |+----------+-----------+----------+-----------+---------+| USER | reserved |reserved | reserved | reserved|+----------+-----------+----------+-----------+---------+- to difference between Dto and Entity its good practice to use Entity in the end of the name of your Entity for example
UserEntity
For people getting this exception ,In postgres Whenever you write an Entity Class try to associate it with the correct schema (where your table is present), like this:
@Entity@Table(name = "user", schema = "users_details")public class User implements Serializable{ @Column(name = "id") Long id; //long is not recommended // Other data}As @YCF_L has said Don't use Upper_case letters in a table name or column name otherwise you will get this exception.
This convention becomes more important when their is a scenario where you have to auto generate the tables from entity classes or vice-versa.
Should add schema name on the Entity class.For this example, when the schema name is public
@Table(name = "user", schema = "public")See the PostgreSQL Admin view below
See here for more about SpringBoot Java and Postgre SQL connectivity:https://cmsoftwaretech.wordpress.com/2020/04/25/springboot-thymleaf-using-postgresql/