Spring Boot- Duplicate entry for key 'PRIMARY' - mysql

Question

I am new to Spring Boot. I am trying to use the save() functionality via the JPA library using Postman for the first time. My database is a legacy Mysql database. Generically speaking, this table contains data of baseball players who have been drafted into a fantasy baseball league. The primary key of my table is 'play_id', and I also track the player's 'mlb_id' (Major League Baseball's unique identifier) in the same table.
Here is my code:
Table setup in Mysql:
CREATE TABLE `mlb_rosters` (
`play_id` int(10) NOT NULL,
`mlb_id` int(10) NOT NULL,
`name_first` varbinary(255) NOT NULL,
`name_last` varbinary(255) NOT NULL,
`bats` varchar(1) NOT NULL,
`throws` varchar(1) NOT NULL,
`birthday` date NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
ALTER TABLE `mlb_rosters`
ADD PRIMARY KEY (`play_id`),
ADD UNIQUE KEY `mlb_id` (`mlb_id`),
ADD UNIQUE KEY `mlb_id_2` (`mlb_id`);
ALTER TABLE `mlb_rosters`
MODIFY `play_id` int(10) NOT NULL AUTO_INCREMENT, AUTO_INCREMENT=6730;
I also ran insert statements for approximately ~1500 players, so this is not a blank table.
My object in Springboot:
package com.example.demo.entities;
import javax.persistence.*;
#Entity
#Table(name="mlb_rosters")
public class IbcMlbPlayer {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name="play_id", columnDefinition = "int(10)")
private Integer playId;
#Column(name="mlb_id")
private Integer mlbId;
#Column(name="name_first", columnDefinition = "varbinary(255)")
private String nameFirst;
#Column(name="name_last", columnDefinition = "varbinary(255)")
private String nameLast;
#Column(name="bats")
private String bats;
#Column(name="throws")
private String thrws;
#Column(name="birthday")
private String birthday;
public IbcMlbPlayer(){
}
public Integer getPlayId() {
return playId;
}
public void setPlayId(Integer playId) {
this.playId = playId;
}
public Integer getMlbId() {
return mlbId;
}
public void setMlbId(Integer mlbId) {
this.mlbId = mlbId;
}
public String getNameFirst() {
return nameFirst;
}
public void setNameFirst(String nameFirst) {
this.nameFirst = nameFirst;
}
public String getNameLast() {
return nameLast;
}
public void setNameLast(String nameLast) {
this.nameLast = nameLast;
}
public String getBats() {
return bats;
}
public void setBats(String bats) {
this.bats = bats;
}
public String getThrws() {
return thrws;
}
public void setThrws(String thrws) {
this.thrws = thrws;
}
public String getBirthday() {
return birthday;
}
public void setBirthday(String birthday) {
this.birthday = birthday;
}
}
The relevant path of my controller:
#PostMapping(value = "/saveIbcMlbPlayer")
public IbcMlbPlayer saveIbcMlbPlayer(#RequestBody IbcMlbPlayer ibcMlbPlayer){
return ibcMlbPlayerDao.save(ibcMlbPlayer);
}
My Dao:
package com.example.demo.dao;
import com.example.demo.entities.IbcMlbPlayer;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
#Repository
public interface IbcMlbPlayerDao extends JpaRepository<IbcMlbPlayer, Integer> {
}
When I attempt to do a Post request to the save path and pass in the JSON object of the player who I'm attempting to create, I get the following error:
Duplicate entry '25' for key 'PRIMARY'
In this case, I've tried this 25 times, so Postman/Spring Boot keep incrementing the 'play_id' field by 1 (this number goes up in the error message by one each time I test).
I understand the error, for whatever reason, Spring Boot isn't getting the max value of the 'play_id' field, incrementing it by one, and then attempting to do the insert. I would have expected 'play_id' to be 6730, which I believe is the table's max play_id plus one. Does anyone know how to fix this? Any help would be really appreciated!

Answer 1

AUTO shouldn't be used as GenerationType you must use IDENTITY
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name="play_id", columnDefinition = "int(10)")
private Integer playId;