Unknown column in 'field list' in cascading persistance - spring-boot

Question

I am using Spring Boot Version 2.5.2 , spring data jpa and MySQL Database
CREATE TABLE Timesheet (
`id` BIGINT(20) NOT NULL AUTO_INCREMENT,
`tsYear` VARCHAR(4) NOT NULL,
`weekNumber` INT NOT NULL,
`startDate` DATE NOT NULL,
`endDate` DATE NOT NULL,
PRIMARY KEY (`id`)
);
CREATE TABLE TimesheetDays (
`id` INT NOT NULL AUTO_INCREMENT,
`timesheetId` BIGINT(20) NOT NULL,
`dayNumber` INT NOT NULL,
`dayDate` DATE NOT NULL,
PRIMARY KEY (`id`),
CONSTRAINT `tsdTimesheetId`
FOREIGN KEY (`timesheetId`)
REFERENCES Timesheet (`id`)
);
#Entity
#Table(name = "timesheet")
public class Timesheet {
#Id
#Column(name = "id")
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
#OneToMany(cascade = {CascadeType.PERSIST, CascadeType.MERGE }, mappedBy = "timesheet")
private List<TimesheetDay> days = null;
}
#Entity
#Table(name = "timesheetdays")
public class TimesheetDay {
#Id
#Column(name = "id")
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
#ManyToOne
private Timesheet timesheet;
}
When i tried to save (timesheet and timesheetdays), for timesheetdays table, hibernate is
generating wrong column.
[2m2021-11-05 18:29:44.147[0;39m [32mDEBUG[0;39m [35m15036[0;39m [2m---[0;39m [2m[nio-8080-exec-2][0;39m [36morg.hibernate.SQL [0;39m [2m:[0;39m insert into timesheetdays (daydate, daynumber, timesheet_id) values (?, ?, ?)
[2m2021-11-05 18:29:44.147[0;39m [32mTRACE[0;39m [35m15036[0;39m [2m---[0;39m [2m[nio-8080-exec-2][0;39m [36mo.h.type.descriptor.sql.BasicBinder [0;39m [2m:[0;39m binding parameter [1] as [DATE] - [2017-12-20]
[2m2021-11-05 18:29:44.148[0;39m [32mTRACE[0;39m [35m15036[0;39m [2m---[0;39m [2m[nio-8080-exec-2][0;39m [36mo.h.type.descriptor.sql.BasicBinder [0;39m [2m:[0;39m binding parameter [2] as [INTEGER] - [1]
[2m2021-11-05 18:29:44.148[0;39m [32mTRACE[0;39m [35m15036[0;39m [2m---[0;39m [2m[nio-8080-exec-2][0;39m [36mo.h.type.descriptor.sql.BasicBinder [0;39m [2m:[0;39m binding parameter [3] as [INTEGER] - [18]
[2m2021-11-05 18:29:44.148[0;39m [33m WARN[0;39m [35m15036[0;39m [2m---[0;39m [2m[nio-8080-exec-2][0;39m [36mo.h.engine.jdbc.spi.SqlExceptionHelper [0;39m [2m:[0;39m SQL Error: 1054, SQLState: 42S22
[2m2021-11-05 18:29:44.148[0;39m [31mERROR[0;39m [35m15036[0;39m [2m---[0;39m [2m[nio-8080-exec-2][0;39m [36mo.h.engine.jdbc.spi.SqlExceptionHelper [0;39m [2m:[0;39m Unknown column 'timesheet_id' in 'field list'
Since the generated column name is timesheet_id, it is not working.
If the generated column name becomes timesheetid, it will work.
Please help to resolve this issue

Answer 1

You need to add the #JoinColumn annotation to give the column name value specifically in your TimesheetDay entity.
#ManyToOne
#JoinColumn(name="timesheetid")
private Timesheet timesheet;