Hibernate Exception while defining mapping

Question

I am working on a project and using Hibernate for database interaction.

I have two tables, one is RESOURCE_PROFILE and second is PROJECT_MASTER. Below are the DDL statements.

CREATE TABLE USER_PROFILE (
    FIRST_NAME VARCHAR(15) NOT NULL,
    MIDDLE_NAME VARCHAR(15),
    LAST_NAME VARCHAR(15) NOT NULL,
    EMAIL_ID VARCHAR(40) NOT NULL,
    USER_ID VARCHAR(40) NOT NULL,
    PASSWORD VARCHAR(1000) NOT NULL,
    ROLE VARCHAR(20),
    SUPERVISOR_ID VARCHAR(20),
    SUBMITTED_BY VARCHAR(20),
    SUBMITTED_DATE DATE,
    PRIMARY KEY (USER_ID)
);

CREATE TABLE PROJECT_MASTER (
    PROJECT_ID INT NOT NULL AUTO_INCREMENT,
    PROJECT_NAME VARCHAR(50) NOT NULL,
    PROJECT_NUMBER VARCHAR(50) NOT NULL,
    START_DATE DATE,
    END_DATE DATE,
    PROJECT_MANAGER_ID VARCHAR(40) NOT NULL,
    PROJECT_SUPERVISOR_ID VARCHAR(40) NOT NULL,
    SUBMITTED_BY VARCHAR(40),
    SUBMITTED_DATE DATE,
    UPDATED_BY VARCHAR(40),
    PRIMARY KEY (PROJECT_ID),
    FOREIGN KEY (PROJECT_MANAGER_ID) REFERENCES USER_PROFILE(USER_ID),
    FOREIGN KEY (PROJECT_SUPERVISOR_ID) REFERENCES USER_PROFILE(USER_ID),
    FOREIGN KEY (SUBMITTED_BY) REFERENCES USER_PROFILE(USER_ID),
    FOREIGN KEY (UPDATED_BY) REFERENCES USER_PROFILE(USER_ID)
);

As you can see in the PROJECT_MASTER table I am using the USER_ID(RESOURCE_PROFILE) as a foreign key for multiple columns in PROJECT_MASTER table. Below is the entity class I created for these two tables. I am sure that I am doing something wrong in the mapping, can you please help me and point me to the right direction? Since I have the same foreign key getting used for multiple columns, how can I achieve this mapping?

    @Entity
    @Table(name = "PROJECT_MASTER")
    public class ProjectMasterBean  {

      @Id
      @GeneratedValue
      @Column(name="PROJECT_ID")
      private int projectID;

      @Column(name="PROJECT_NAME")
      private String projectName;

      @Column(name="PROJECT_NUMBER")
      private String projectNumber;

      @Column(name="START_DATE")
      private Date startDate;

      @Column(name="END_DATE")
      private Date endDate;

      @ManyToOne
     @JoinColumn(name="USER_ID",insertable=false, updatable=false,
            nullable=false)
      private UserProfileBean projectManagerID;

      @ManyToOne
     @JoinColumn(name="USER_ID",insertable=false, updatable=false,
            nullable=false)
      private UserProfileBean projectSupervisorID;

      @ManyToOne
    @JoinColumn(name="USER_ID",insertable=false, updatable=false,
            nullable=false)
      private UserProfileBean submittedBy;
    }

      @Column(name="SUBMITTED_DATE")
      private Date submittedDate;

      @ManyToOne
    @JoinColumn(name="USER_ID",insertable=false, updatable=false,
            nullable=false)
      private UserProfileBean updatedBy;


     public class UserProfileBean  {
    @Id
      @Column(name="USER_ID")
      private String userID;

      @Column(name="FIRST_NAME")
      private String firstName;

      @Column(name="MIDDLE_NAME")
      private String middleName;

      @Column(name="LAST_NAME")
      private String lastName;

      @Column(name="EMAIL_ID")
      private String emailID;

      @Column(name="PASSWORD")
      private String password;

      @Column(name="ROLE")
      private String userRole;

      @Column(name="SUPERVISOR_ID")
      private String supervisorID;

      @Column(name="SUBMITTED_BY")
      private String submittedBy;

      @Column(name="SUBMITTED_DATE")
      private String submittedDate;
}

This is the exception I am getting:

Hibernate: insert into PROJECT_MASTER (PROJECT_NAME, PROJECT_NUMBER, START_DATE, END_DATE, SUBMITTED_BY, SUBMITTED_DATE, UPDATED_BY) values (?, ?, ?, ?, ?, ?, ?) Sep 12, 2013 8:46:20 PM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet action threw exception

java.sql.SQLException: Field 'PROJECT_MANAGER_ID' doesn't have a default value
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1073)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3609)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3541)
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2002)
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2163)

Insert Query doesn't even have those two columns. This is how the query should be.

Hibernate: insert into PROJECT_MASTER (PROJECT_NAME, PROJECT_NUMBER, START_DATE, END_DATE, PROJECT_MANAGET_ID , PROJECT_SUPERVISOR_ID , SUBMITTED_BY, SUBMITTED_DATE, UPDATED_BY) values (?, ?, ?, ?, ?, ?, ?,?,?)

Answer 1

You've created your table with

CREATE TABLE PROJECT_MASTER ( PROJECT_ID INT NOT NULL AUTO_INCREMENT, PROJECT_NAME VARCHAR(50) NOT NULL, PROJECT_NUMBER VARCHAR(50) NOT NULL, START_DATE DATE, END_DATE DATE, PROJECT_MANAGER_ID VARCHAR(40) NOT NULL, PROJECT_SUPERVISOR_ID VARCHAR(40) NOT NULL, SUBMITTED_BY VARCHAR(40), SUBMITTED_DATE DATE, UPDATED_BY VARCHAR(40), PRIMARY KEY (PROJECT_ID), FOREIGN KEY (PROJECT_MANAGER_ID) REFERENCES USER_PROFILE(USER_ID), FOREIGN KEY (PROJECT_SUPERVISOR_ID) REFERENCES USER_PROFILE(USER_ID), FOREIGN KEY (SUBMITTED_BY) REFERENCES USER_PROFILE(USER_ID), FOREIGN KEY (UPDATED_BY) REFERENCES USER_PROFILE(USER_ID) );

And you've made your class uses this Table. Because you don't have a default value for a NOT NULL field, Hibernate complains. Either delete that column from the table or add a relationship in your entity mapping.

Change to

@ManyToOne
@JoinColumn(name="PROJECT_MANAGER_ID ",insertable=false, updatable=false,
        nullable=false)
private UserProfileBean projectManagerID;