How to convert DTO to an entity with a related column

How to convert DTO to an entity with a related column - java

This is probebly a repetition to my yesturday's question here
Can't save data to a database with DTO
I can get a request as DTO. But then I convert it to a model class back I get value of regionid column as null.
My DTO Class
package com.example.dto;
import java.util.HashSet;
import java.util.Set;
import lombok.Data;
#Data
public class TownDTO {
public String name;
public String regionid;
}
My model:
package com.example.model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import org.hibernate.annotations.OnDelete;
import org.hibernate.annotations.OnDeleteAction;
import com.fasterxml.jackson.annotation.JsonIgnore;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
#Data
#NoArgsConstructor
#AllArgsConstructor
#Entity
#Table(name = "towns")
public class Towns {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private int id;
#Column(name = "name")
private String name;
#JsonIgnore
#ManyToOne(fetch = FetchType.LAZY, optional = false)
#JoinColumn(name = "regionid", nullable = false)
#OnDelete(action = OnDeleteAction.CASCADE)
private Regions regionid;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Regions getRegionid() {
return regionid;
}
public void setRegionid(Regions regionid) {
this.regionid = regionid;
}
}
Controller:
package com.example.controller;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import com.example.dto.TownDTO;
import com.example.model.Regions;
import com.example.model.Towns;
import com.example.repository.TownsRepository;
import com.example.repository.RegionsRepository;
import java.util.stream.Collectors;
import org.modelmapper.Conditions;
import org.modelmapper.ModelMapper;
#CrossOrigin(origins = "http://localhost:8081")
#RestController
#RequestMapping("/towns")
public class TownsController {
#Autowired
TownsRepository townsrepository;
#Autowired
RegionsRepository regionsrepository;
#Autowired
private ModelMapper modelMapper;
#GetMapping("/list")
public ResponseEntity<List<Towns>> getAllTowns(#RequestParam(required = false) String name) {
try {
List<Towns> towns = new ArrayList<Towns>();
if (name == null)
townsrepository.findAll().forEach(towns::add);
else
townsrepository.findByNameContaining(name).forEach(towns::add);
if (towns.isEmpty()) {
return new ResponseEntity<>(HttpStatus.NO_CONTENT);
}
return new ResponseEntity<>(towns, HttpStatus.OK);
} catch (Exception e) {
return new ResponseEntity<>(null, HttpStatus.INTERNAL_SERVER_ERROR);
}
}
#GetMapping("/list/{id}")
public ResponseEntity<Towns> getTownById(#PathVariable("id") int id) {
Optional<Towns> townData = townsrepository.findById(id);
if (townData.isPresent()) {
return new ResponseEntity<>(townData.get(), HttpStatus.OK);
} else {
return new ResponseEntity<>(HttpStatus.NOT_FOUND);
}
}
#PostMapping("/add")
public ResponseEntity<TownDTO> createPost(#RequestBody TownDTO townDto) {
// convert DTO to entity
Towns townRequest = modelMapper.map(townDto, Towns.class);
System.out.println("reg");
System.out.println(townRequest.getName());
System.out.println(townRequest.getRegionid());
//Regions rid=regionsrepository.findById(2).get();
// townRequest.setRegionid(townDto.regionid);
Towns town = townsrepository.save(townRequest);
// convert entity to DTO
TownDTO townResponse = modelMapper.map(town, TownDTO.class);
return new ResponseEntity<TownDTO>(townResponse, HttpStatus.CREATED);
}
/*
#PostMapping("/addt")
public ResponseEntity<Towns> createtown2(#RequestBody Towns town) {
try {
Towns _town = townsrepository
.save(town);
// Towns _town = townsrepository .save(new Towns( town.getName(), regionsrepository.findByRegionId(town.getRegionid())));
return new ResponseEntity<>(_town, HttpStatus.CREATED);
} catch (Exception e) {
System.out.println(e.getMessage());
System.out.println("region");
System.out.println(town.getRegionid());
return new ResponseEntity<>(null, HttpStatus.INTERNAL_SERVER_ERROR);
}
}
*/
#PutMapping("/edit/{id}")
/*
public ResponseEntity<Towns> updateTown(#PathVariable("id") int id, #RequestBody Towns town) {
Optional<Towns> townData = townsrepository.findById(id);
if (townData.isPresent()) {
Towns _town = townData.get();
_town.setName(town.getName());
_town.setRegionid(town.getRegionid());
return new ResponseEntity<>(townsrepository.save(_town), HttpStatus.OK);
} else {
return new ResponseEntity<>(HttpStatus.NOT_FOUND);
}
}
*/
#DeleteMapping("/delete/{id}")
public ResponseEntity<HttpStatus> deleteTown(#PathVariable("id") int id) {
try {
townsrepository.deleteById(id);
return new ResponseEntity<>(HttpStatus.NO_CONTENT);
} catch (Exception e) {
return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
}
}
}
Try to set id to an entety.
Regions rgid=regionsrepository.findById(2).get();
townRequest.setRegionid(rgid.getId());

use ModelMapper.
If your entity class id field uses #Id annotation with auto-generating JPA key like #GeneratedValue(strategy = GenerationType.IDENTITY) as id, then using only model mapper and saving the entity should give you the expected result.
Otherwise, if set your PKID value manually and then save the entity.
Update: for your updated question,
add the whole Region in your Towns entity:
Regions rgid=regionsrepository.findById(2).get();
townRequest.setRegionid(rgid);

Related

Can't save data to a database with DTO

This question is kindly related to a previous one here:
getting null while posting data
I tryed a suggested answer, imported lombok and created a DTO class as follows:
package com.example.dto;
import java.util.HashSet;
import java.util.Set;
import lombok.Data;
#Data
public class TownDTO {
public String name;
public String regionid;
}
Table towns is related to a regions table in db. While I try to save data I am getting a following exception:
not-null property references a null or transient value : com.example.model.Towns.regionid
Here is my model class
package com.example.model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import org.hibernate.annotations.OnDelete;
import org.hibernate.annotations.OnDeleteAction;
import com.fasterxml.jackson.annotation.JsonIgnore;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
#Data
#NoArgsConstructor
#AllArgsConstructor
#Entity
#Table(name = "towns")
public class Towns {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private int id;
#Column(name = "name")
private String name;
#JsonIgnore
#ManyToOne(fetch = FetchType.LAZY, optional = false)
#JoinColumn(name = "regionid", nullable = false)
#OnDelete(action = OnDeleteAction.CASCADE)
private Regions regionid;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Regions getRegionid() {
return regionid;
}
public void setRegionid(Regions regionid) {
this.regionid = regionid;
}
}
And repositories are as follows.
Towns repository
package com.example.repository;
import java.util.List;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.jpa.repository.JpaRepository;
import java.util.Optional;
import com.example.model.Towns;
import com.example.model.Regions;
public interface TownsRepository extends JpaRepository<Towns, Integer> {
List<Towns> findByNameContaining(String name);
Page<Regions> findByregionid(Integer regionid, Pageable pageable);
Optional<Regions> findByregionidAndId(Integer regionId, Integer id);
}
regions repository
package com.example.repository;
import java.util.List;
import org.springframework.data.jpa.repository.JpaRepository;
import com.example.model.Regions;
public interface RegionsRepository extends JpaRepository<Regions, Integer> {
List<Regions> findByNameContaining(String name);
}
And finaly the controller method:
#PostMapping("/add")
public ResponseEntity<TownDTO> createPost(#RequestBody TownDTO townDto) {
// convert DTO to entity
Towns townRequest = modelMapper.map(townDto, Towns.class);
//System.out.println(townDto.regionid);
//System.out.println(townRequest.getName());
Towns town = townsrepository.save(townRequest);
// convert entity to DTO
TownDTO townResponse = modelMapper.map(town, TownDTO.class);
return new ResponseEntity<TownDTO>(townResponse, HttpStatus.CREATED);
}
I am able to print out townDTO.regionid and value is correct 2 in my case. But request is still null. Here is a request from postman
{
"name": "test",
"regionid": "2"
}
What am I missing right now?
Removed #jsonignore and added getters and setters to DTO
package com.example.dto;
import java.util.HashSet;
import java.util.Set;
import lombok.Data;
import lombok.Getter;
import lombok.Setter;
#Data
public class TownDTO {
public String name;
public String regionid;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getRegionid() {
return regionid;
}
public void setRegionid(String regionid) {
this.regionid = regionid;
}
}
Nothin had change. Error is the same

Your TownDTO contains String regionid whereas your Model class it's Region Object. So moddlemapper can't map.
//DTO
public String regionid;
//Model
private Regions regionid;

getting null while posting data

I am using a postman to work with spring boot api. Currently I am trying to add data to a related table. There are 2 of them regions and towns. Towns has a regionid column. Here is my request.
{
"name": "test",
"regionid":"2"
}
While name is posting just fine, region id is null. I am trying to print it out in a controller. Here is a save data method of it:
#PostMapping("/add")
public ResponseEntity<Towns> createtown(#RequestBody Towns town) {
try {
Towns _town = townsrepository
.save(new Towns( town.getName(), town.getRegionid()));
return new ResponseEntity<>(_town, HttpStatus.CREATED);
} catch (Exception e) {
System.out.println(e.getMessage());
System.out.println("region");
System.out.println(town.getRegionid());
return new ResponseEntity<>(null, HttpStatus.INTERNAL_SERVER_ERROR);
}
}
I am getting the exception and while I am printing town.getName() I get test. But while I try to print out town.getRegionId() I get null. Here is my model class
package com.example.model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import org.hibernate.annotations.OnDelete;
import org.hibernate.annotations.OnDeleteAction;
#Entity
#Table(name = "towns")
public class Towns {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private int id;
#Column(name = "name")
private String name;
#ManyToOne(fetch = FetchType.LAZY, optional = false)
#JoinColumn(name = "regionid", nullable = false)
#OnDelete(action = OnDeleteAction.CASCADE)
private Regions regionid;
public Towns() {
}
public Towns(String name,Regions regionid) {
// super();
this.id=id;
this.name = name;
this.regionid=regionid;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Regions getRegionid() {
return regionid;
}
public void setRegionid(Regions regionid) {
this.regionid = regionid;
}
}
And the repository:
package com.example.repository;
import java.util.List;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.jpa.repository.JpaRepository;
import java.util.Optional;
import com.example.model.Towns;
import com.example.model.Regions;
public interface TownsRepository extends JpaRepository<Towns, Integer> {
List<Towns> findByNameContaining(String name);
Page<Regions> findByregionid(Integer regionid, Pageable pageable);
Optional<Regions> findByregionidAndId(Integer regionId, Integer id);
}
And Application.properties in case it will help
spring.datasource.url= jdbc:mysql://localhost:3306/appartmentbuilderbase?useSSL=false
spring.datasource.username= root
spring.datasource.password=
spring.jpa.properties.hibernate.dialect= org.hibernate.dialect.MySQL5InnoDBDialect
spring.jpa.hibernate.ddl-auto= update
What I am doing wrong here?
Tryed to do as suggested:
Towns _town = townsrepository .save(new Towns( town.getName(), regionsrepository.findById(town.getRegionid())));
And got those errors:
Description Resource Path Location Type
The constructor Towns(String, Optional<Regions>) is undefined TownsController.java /apartmentbuilders/src/main/java/com/example/controller line 71 Java Problem
And This:
Description Resource Path Location Type
The method save(S) in the type CrudRepository<Towns,Integer> is not applicable for the arguments (Towns) TownsController.java /apartmentbuilders/src/main/java/com/example/controller line 71 Java Problem
Adding a full controller code
package com.example.controller;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import com.example.model.Towns;
import com.example.repository.TownsRepository;
import com.example.repository.RegionsRepository;
#CrossOrigin(origins = "http://localhost:8081")
#RestController
#RequestMapping("/towns")
public class TownsController {
#Autowired
TownsRepository townsrepository;
#Autowired
RegionsRepository regionsrepository;
#GetMapping("/list")
public ResponseEntity<List<Towns>> getAllTowns(#RequestParam(required = false) String name) {
try {
List<Towns> towns = new ArrayList<Towns>();
if (name == null)
townsrepository.findAll().forEach(towns::add);
else
townsrepository.findByNameContaining(name).forEach(towns::add);
if (towns.isEmpty()) {
return new ResponseEntity<>(HttpStatus.NO_CONTENT);
}
return new ResponseEntity<>(towns, HttpStatus.OK);
} catch (Exception e) {
return new ResponseEntity<>(null, HttpStatus.INTERNAL_SERVER_ERROR);
}
}
#GetMapping("/list/{id}")
public ResponseEntity<Towns> getTownById(#PathVariable("id") int id) {
Optional<Towns> townData = townsrepository.findById(id);
if (townData.isPresent()) {
return new ResponseEntity<>(townData.get(), HttpStatus.OK);
} else {
return new ResponseEntity<>(HttpStatus.NOT_FOUND);
}
}
#PostMapping("/add")
public ResponseEntity<Towns> createtown(#RequestBody Towns town) {
try {
Towns _town = townsrepository
.save(new Towns( town.getName(), town.getRegionid()));
// Towns _town = townsrepository .save(new Towns( town.getName(), regionsrepository.findByRegionId(town.getRegionid())));
return new ResponseEntity<>(_town, HttpStatus.CREATED);
} catch (Exception e) {
System.out.println(e.getMessage());
System.out.println("region");
System.out.println(town.getRegionid());
return new ResponseEntity<>(null, HttpStatus.INTERNAL_SERVER_ERROR);
}
}
#PutMapping("/edit/{id}")
public ResponseEntity<Towns> updateTown(#PathVariable("id") int id, #RequestBody Towns town) {
Optional<Towns> townData = townsrepository.findById(id);
if (townData.isPresent()) {
Towns _town = townData.get();
_town.setName(town.getName());
_town.setRegionid(town.getRegionid());
return new ResponseEntity<>(townsrepository.save(_town), HttpStatus.OK);
} else {
return new ResponseEntity<>(HttpStatus.NOT_FOUND);
}
}
#DeleteMapping("/delete/{id}")
public ResponseEntity<HttpStatus> deleteTown(#PathVariable("id") int id) {
try {
townsrepository.deleteById(id);
return new ResponseEntity<>(HttpStatus.NO_CONTENT);
} catch (Exception e) {
return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
}
}
}
adding Regions repository
package com.example.repository;
import java.util.List;
import org.springframework.data.jpa.repository.JpaRepository;
import com.example.model.Regions;
public interface RegionsRepository extends JpaRepository<Regions, Integer> {
List<Regions> findByNameContaining(String name);
}

You are missing a DTO class. Don't directly map DB entity class to request body. have a class like
#Data
public class TownDTO {
private String name;
private String regionid;
}
also when saving, get the region through a repository:
Towns _town = townsrepository
.save(new Towns( town.getName(), regionRepository.findByRegionId(town.regionId)));
So in controller:
#PostMapping("/add")
public ResponseEntity<Towns> createtown(#RequestBody Town town) {
try {
Towns _town = townsrepository
.save(new Towns( town.getName(), regionRepository.findByRegionId(town.regionId)));
return new ResponseEntity<>(_town, HttpStatus.CREATED);
} catch (Exception e) {
System.out.println(e.getMessage());
System.out.println("region");
System.out.println(town.getRegionid());
return new ResponseEntity<>(null, HttpStatus.INTERNAL_SERVER_ERROR);
}
}

Deserialize from Number value to int (error - no int/Int-argument constructor/factory method to deserialize from Number value) while posting data

I asked previously basically the same question and solved it somehow, but here is a problem again:
I am sending post data from my Angular 12 app
{
"qty": 2,
"paid": 200,
"ticketid": 2
}
This is for userticket model which looks like this in java:
package com.example.model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.EntityListeners;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import java.util.Date;
import org.hibernate.annotations.OnDelete;
import org.hibernate.annotations.OnDeleteAction;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
#Entity
#Table(name = "tickettouser")
public class TicketUser {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
private int id;
#JsonIgnoreProperties({"hibernateLazyInitializer", "handler"})
#ManyToOne(fetch = FetchType.LAZY, optional = false)
#JoinColumn(name = "userid", nullable = false)
#OnDelete(action = OnDeleteAction.CASCADE)
private Users userid;
#Column(name = "qty")
private int qty;
#Column(name = "paid")
private float paid;
#JsonIgnoreProperties({"hibernateLazyInitializer", "handler","ignoreUnknown = true"})
#ManyToOne(fetch = FetchType.LAZY, optional = false)
#JoinColumn(name = "ticketid", nullable = false)
#OnDelete(action = OnDeleteAction.CASCADE)
private Tickets ticketid;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public Users getUserid() {
return userid;
}
public void setUserid(Users userid) {
this.userid = userid;
}
public int getQty() {
return qty;
}
public void setQty(int qty) {
this.qty = qty;
}
public float getPaid() {
return paid;
}
public void setPaid(float paid) {
this.paid = paid;
}
public Tickets getTicketid() {
return ticketid;
}
public void setTicketid(Tickets ticketid) {
this.ticketid = ticketid;
}
}
The full error:
2021-11-08 14:07:46.938 WARN 8180 --- [nio-8888-exec-8] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot construct instance of `com.example.model.Tickets` (although at least one Creator exists): no int/Int-argument constructor/factory method to deserialize from Number value (2); nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot construct instance of `com.example.model.Tickets` (although at least one Creator exists): no int/Int-argument constructor/factory method to deserialize from Number value (2)
at [Source: (PushbackInputStream); line: 1, column: 32] (through reference chain: com.example.model.TicketUser["ticketid"])]
And my ticket model
package com.example.model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.EntityListeners;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import java.util.Date;
import org.hibernate.annotations.OnDelete;
import org.hibernate.annotations.OnDeleteAction;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
#Entity
#Table(name = "tickets")
public class Tickets {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
private int id;
#Column(name = "price")
private Float price;
#JsonIgnoreProperties({"hibernateLazyInitializer", "handler"})
#ManyToOne(fetch = FetchType.LAZY, optional = false)
#JoinColumn(name = "event_id", nullable = false)
#OnDelete(action = OnDeleteAction.CASCADE)
private Events eventid;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public Float getPrice() {
return price;
}
public void setPrice(Float price) {
this.price = price;
}
public Events getEventid() {
return eventid;
}
public void setEventid(Events eventid) {
this.eventid = eventid;
}
}
And finally my ticketuser controller
package com.example.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
import com.example.model.TicketUser;
import com.example.security.services.UserDetailsImp;
import com.example.model.Cities;
import com.example.model.Events;
import com.example.model.Halls;
import com.example.service.UsersticketService;
import com.example.service.EventsService;
import com.example.service.HallsService;
import com.example.service.UsersService;
import com.example.model.Users;
#Controller
#RequestMapping(value="/userticket")
#SpringBootApplication
#CrossOrigin(origins = "http://localhost:8889")
public class UsersTicketController {
#Autowired
UsersticketService usersticketService;
#Autowired
UsersService usersservice;
#RequestMapping(value="/list", method=RequestMethod.GET)
public ResponseEntity list()
{
Authentication auth = SecurityContextHolder.getContext().getAuthentication();
String usr= auth.getName();
Users user=usersservice.getUserByLogin(usr);
int id=user.getId();
List<TicketUser> ticketList=usersticketService.getTicketByUser(id);
// user.getId();
//System.out.println(user);
return new ResponseEntity<>(ticketList, HttpStatus.OK);
}
#RequestMapping(value="/add", method=RequestMethod.POST)
public ResponseEntity add(#RequestBody TicketUser ticket)
{
Authentication auth = SecurityContextHolder.getContext().getAuthentication();
String usr= auth.getName();
Users user=usersservice.getUserByLogin(usr);
Users userid=new Users();
userid.setId(user.getId());
ticket.setUserid(userid);
usersticketService.addTicket(ticket);
return new ResponseEntity<>(ticket, HttpStatus.CREATED);
}
#RequestMapping(value="/delete/{id}", method=RequestMethod.GET)
public ResponseEntity delete(#PathVariable("id") int id)
{
usersticketService.deleteTicket(id);
return new ResponseEntity<>(HttpStatus.NO_CONTENT);
}
}
As you can see I don't use any custom deserialize methods or somethin like that. How this problem can be solved?
I see this error if I try to use add method in my controller
Will add TicketuserRepository:
package com.example.repository;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
import java.util.List;
import java.util.Optional;
//import org.springframework.boot.autoconfigure.data.web.SpringDataWebProperties.Pageable;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Page;
import org.springframework.data.jpa.repository.JpaRepository;
import com.example.model.TicketUser;
import com.example.model.Users;
import com.example.model.Events;
import com.example.model.Halls;
#Repository
public interface TicketsUserRepository extends CrudRepository<TicketUser, Integer> {
Page<Events> findByuserid(Integer userid, Pageable pageable);
Optional<Events> findByuseridAndId(Integer userid, Integer id);
Page<Events> findByticketid(Integer ticketid, Pageable pageable);
Optional<Events> findByticketidAndId(Integer ticketid, Integer id);
List<TicketUser> findByUserid(int id);
}
and the service
package com.example.service;
import java.util.List;
import com.example.model.TicketUser;
import com.example.model.Events;
import com.example.model.Halls;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.example.repository.TicketsUserRepository;
import com.example.repository.EventsRepository;
import com.example.repository.HallsRepository;
#Service
#Transactional
public class UsersticketServiceImplementation implements UsersticketService {
#Autowired
TicketsUserRepository ticketsuserRepository;
#Override
public List<TicketUser> getAllTickets() {
// TODO Auto-generated method stub
return (List<TicketUser>) ticketsuserRepository.findAll();
}
#Override
public TicketUser getTicketById(int id) {
// TODO Auto-generated method stub
return ticketsuserRepository.findById(id).get();
}
#Override
public void addTicket(TicketUser ticketuser) {
// TODO Auto-generated method stub
ticketsuserRepository.save(ticketuser);
}
#Override
public void deleteTicket(int id) {
// TODO Auto-generated method stub
ticketsuserRepository.deleteById(id);
}
#Override
public List<TicketUser> getTicketByUser(int id) {
// TODO Auto-generated method stub
return (List<TicketUser>) ticketsuserRepository.findByUserid(id);
}
}
This is my model userticket in angular:
import {Ticket} from "./ticket.model";
export class Userticket {
id?:any;
qty?:number;
paid?:number;
ticketid?:Ticket;
}
Will add my ticketuser comonent from angular
import { Component, OnInit } from '#angular/core';
import { EventService } from 'src/app/services/event.service';
import { Event } from 'src/app/models/event.model';
import {TicketService} from 'src/app/services/ticket.service';
import {Ticket} from "../../models/ticket.model";
import {Userticket} from "../../models/userticket.model";
import {UserticketService} from "../../services/userticket.service";
import {ActivatedRoute, Router} from "#angular/router";
#Component({
selector: 'app-userticket-buy',
templateUrl: './userticket-buy.component.html',
styleUrls: ['./userticket-buy.component.css']
})
export class UserticketBuyComponent implements OnInit {
currentTicket: Ticket = {
price: 0,
eventid:this.retrieveEvents()
};
eventid = this.currentTicket.eventid;
events?: Event[];
submitted = false;
currentUserTicket: Userticket = {
qty: 1,
paid:0,
};
//final current
//end
message = ''
constructor(
private eventService: EventService,
private ticketService:TicketService,
private userticketService:UserticketService,
private route: ActivatedRoute,
private router: Router) { }
ngOnInit(): void {
this.message = '';
this.getTicket(this.route.snapshot.params.id);
}
getTicket(id: string): void {
this.ticketService.get(id)
.subscribe(
data => {
this.currentTicket = data;
console.log(data);
},
error => {
console.log(error);
});
}
//save order
saveOrder(): void {
const data = {
qty: this.currentUserTicket.qty,
paid: this.currentUserTicket.paid,
ticketid: this.currentTicket.id
};
//console.log(data.eventid);
this.userticketService.create(data)
.subscribe(
response => {
console.log("city")
console.log(response);
this.submitted = true;
},
error => {
console.log(error);
});
}
//end
retrieveEvents(): any {
this.eventService.getAll()
.subscribe(
data => {
this.events = data;
console.log(data);
return data;
},
error => {
console.log(error);
return error;
});
}
calculatePrice($event:any){
let n1:number|undefined;
n1=this.currentTicket.price;
let n2:number|undefined;
n2=this.currentUserTicket.qty || 1;
let res:number|undefined;
res=n1 || 1 * n2 || 1;
console.log(this.currentUserTicket.qty);
// #ts-ignore: Object is possibly 'null'.
this.currentUserTicket.paid= this.currentUserTicket.qty*this.currentTicket.price
}
}
And the template:
<div>
<div *ngIf="currentTicket.id" class="edit-form">
<h4>Билет</h4>
<form>
<div class="form-group">
<label for="title">Количество</label>
<input type="number"
class="form-control"
id="title"
[(ngModel)]="currentUserTicket.qty"
name="qty"
(keyup)="calculatePrice($event)"
/>
<input
type="hidden"
class="form-control"
id="id"
[(ngModel)]="currentTicket"
name="ticketid"
/>
</div>
<div class="form-group">
<label for="title">Итого</label>
<input
type="number"
class="form-control"
id="paid"
[(ngModel)]="currentUserTicket.paid"
name="paid"
/>
</div>
<div class="form-group">
<p>Событие: {{currentTicket.eventid?.name}}</p>
<p>Зал: {{currentTicket.eventid?.hallid?.name}}</p>
<p>Город: {{currentTicket.eventid?.cityid?.name}}</p>
</div>
</form>
<button
type="submit"
class="badge badge-success mb-2"
(click)="saveOrder()"
>
Подтвердить
</button>
<p>{{ message }}</p>
</div>
<div *ngIf="!currentTicket.id">
<br />
<p>Нет доступа...</p>
</div>
</div>
Will add my working example from ticket model:
tickets.java
package com.example.model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.EntityListeners;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import java.util.Date;
import org.hibernate.annotations.OnDelete;
import org.hibernate.annotations.OnDeleteAction;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
#Entity
#Table(name = "tickets")
public class Tickets {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
private int id;
#Column(name = "price")
private Float price;
#JsonIgnoreProperties({"hibernateLazyInitializer", "handler"})
#ManyToOne(fetch = FetchType.LAZY, optional = false)
#JoinColumn(name = "event_id", nullable = false)
#OnDelete(action = OnDeleteAction.CASCADE)
private Events eventid;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public Float getPrice() {
return price;
}
public void setPrice(Float price) {
this.price = price;
}
public Events getEventid() {
return eventid;
}
public void setEventid(Events eventid) {
this.eventid = eventid;
}
}
TicketsRepository:
package com.example.repository;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
import java.util.Optional;
//import org.springframework.boot.autoconfigure.data.web.SpringDataWebProperties.Pageable;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Page;
import org.springframework.data.jpa.repository.JpaRepository;
import com.example.model.Tickets;
import com.example.model.Events;
import com.example.model.Halls;
#Repository
public interface TicketsRepository extends CrudRepository<Tickets, Integer>{
Page<Events> findByeventid(Integer eventid, Pageable pageable);
Optional<Events> findByeventidAndId(Integer eventid, Integer id);
}
TicketService:
package com.example.service;
import java.util.List;
import com.example.model.Tickets;
import com.example.model.Events;
import com.example.model.Halls;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.example.repository.EventsRepository;
import com.example.repository.HallsRepository;
import com.example.repository.TicketsRepository;
#Service
#Transactional
public class TicketsServiceImplementation implements TicketsService {
#Autowired
TicketsRepository ticketsRepository;
#Override
public List<Tickets> getAllTickets() {
// TODO Auto-generated method stub
return (List<Tickets>) ticketsRepository.findAll();
}
#Override
public Tickets getTicketById(int id) {
// TODO Auto-generated method stub
return ticketsRepository.findById(id).get();
}
#Override
public void addTicket(Tickets ticket) {
// TODO Auto-generated method stub
ticketsRepository.save(ticket);
}
#Override
public void deleteTicket(int id) {
// TODO Auto-generated method stub
ticketsRepository.deleteById(id);
}
}
And the controller:
package com.example.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
import com.example.model.Tickets;
import com.example.model.Events;
import com.example.model.Halls;
import com.example.service.TicketsService;
import com.example.service.EventsService;
import com.example.service.HallsService;
#Controller
#CrossOrigin(origins = "http://localhost:8889")
#RequestMapping(value="/ticket")
#SpringBootApplication
public class TicketsController {
#Autowired
TicketsService ticketsService;
#RequestMapping(value="/list", method=RequestMethod.GET)
public ResponseEntity list()
{
List<Tickets> ticketList=ticketsService.getAllTickets();
return new ResponseEntity<>(ticketList, HttpStatus.OK);
}
#RequestMapping(value="/add", method=RequestMethod.POST)
public ResponseEntity add(#RequestBody Tickets ticket)
{
ticketsService.addTicket(ticket);
return new ResponseEntity<>(ticket, HttpStatus.CREATED);
}
#RequestMapping(value="/delete/{id}", method=RequestMethod.GET)
public ResponseEntity delete(#PathVariable("id") int id)
{
ticketsService.deleteTicket(id);
return new ResponseEntity<>(HttpStatus.NO_CONTENT);
}
#RequestMapping(value="/getone/{id}", method=RequestMethod.GET)
public ResponseEntity getOne(#PathVariable("id") int id)
{
Tickets ticket= ticketsService.getTicketById(id);
return new ResponseEntity<>(ticket, HttpStatus.OK);
}
}
Basically this is the ticket table controller. It was basically made a same way as UserTicket. Why then I am getting this problem?

The error is that in the model you are using a full object of ticket and that is also marked as nullable = false so while saving the model in database you need to create an object of ticket using theticketId attribute in the request json or change the model’s attribute from type Tickets to int
You are already doing the same thing for user by setting user object.

Save List items from html table to Mysql

I am trying to save a list of items from an html table in mysql, but it gives me an error:
Failed to convert value of type 'java.lang.String' to required type 'java.lang.Long[]'; nested exception is java.lang.NumberFormatException: For input string: "{ID}".
My Code is:
Entity Class is
package com.gadpo.cga.app.models.entity;
import java.io.Serializable;
import java.util.Date;
import java.util.List;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.validation.constraints.NotEmpty;
import javax.validation.constraints.NotNull;
import org.springframework.format.annotation.DateTimeFormat;
#Entity
#Table(name = "paquetes")
public class Paquete implements Serializable{
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#NotEmpty
private String detalle;
#DateTimeFormat(pattern = "yyyy-MM-dd")
#Temporal(TemporalType.DATE)
#NotNull
#Column(name="fecha")
private Date fecha;
#OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL, orphanRemoval=true)
#JoinColumn(name="paquete_id")
private List<Actividad> actividades;
#NotNull
#OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL, orphanRemoval=true)
#JoinColumn(name="paquete_id")
private List<ItemPaquete> items;
//#OneToMany(mappedBy = "paquete", fetch = FetchType.LAZY, cascade = CascadeType.ALL)
//private List<Usuario> usuarios;
public List<ItemPaquete> getItems() {
return items;
}
public void setItems(List<ItemPaquete> items) {
this.items = items;
}
#ManyToOne(fetch = FetchType.LAZY)
private Usuario usuario;
#ManyToOne(fetch = FetchType.LAZY)
private Planificacion planificacion;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getDetalle() {
return detalle;
}
public void setDetalle(String detalle) {
this.detalle = detalle;
}
public List<Actividad> getActividades() {
return actividades;
}
public void setActividades(List<Actividad> actividades) {
this.actividades = actividades;
}
public Planificacion getPlanificacion() {
return planificacion;
}
public void setPlanificacion(Planificacion planificacion) {
this.planificacion = planificacion;
}
public Usuario getUsuario() {
return usuario;
}
public void setUsuario(Usuario usuario) {
this.usuario = usuario;
}
public Date getFecha() {
return fecha;
}
public void setFecha(Date fecha) {
this.fecha = fecha;
}
public void addItemPaquete(ItemPaquete item) {
items.add(item);
}
/**
*
*/
private static final long serialVersionUID = 1L;
}
Controller is:
package com.gadpo.cga.app.controller;
import java.util.List;
import java.util.Map;
import javax.validation.Valid;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.SessionAttributes;
import org.springframework.web.bind.support.SessionStatus;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;
import com.gadpo.cga.app.models.entity.ItemPaquete;
import com.gadpo.cga.app.models.entity.Paquete;
import com.gadpo.cga.app.models.entity.Planificacion;
import com.gadpo.cga.app.models.entity.Usuario;
import com.gadpo.cga.app.models.service.IUsuarioService;
#Controller
#RequestMapping("/paquete")
#SessionAttributes("paquete")
public class PaqueteController {
#Autowired
private IUsuarioService usuarioService;
private final Logger log = LoggerFactory.getLogger(getClass());
#GetMapping("/form/{planificacionId}")
public String crear(#PathVariable(value="planificacionId") Long planificacionId, Map<String, Object> model, RedirectAttributes flash) {
Planificacion planificacion=usuarioService.findPlanificacionById(planificacionId);
if(planificacion==null) {
flash.addFlashAttribute("error","La planificación no existe en la bd");
return "redirect:/listar";
}
Paquete paquete = new Paquete();
paquete.setPlanificacion(planificacion);
model.put("paquete", paquete);
model.put("titulo", "Registro de paquete");
return "paquete/form";
}
#GetMapping(value="/cargar-usuarios/{term}", produces= {"application/json"})
public #ResponseBody List<Usuario>cargarUsuarios(#PathVariable String term){
return usuarioService.findByApellido(term);
}
#PostMapping("/form")
public String guardar(#Valid Paquete paquete,BindingResult result,Model model,
#RequestParam(name="item_id[]",required = false) Long [] itemId,RedirectAttributes flash, SessionStatus status) {
if (result.hasErrors()) {
model.addAttribute("titulo", "Registrar nuevo paquete");
return "paquete/form";
}
for(int i=0; i<itemId.length;i++) {
//System.out.println("ID del usuario: "+itemId[i]);
Usuario usuario = usuarioService.findUsuarioById(itemId[i]);
ItemPaquete linea = new ItemPaquete();
linea.setUsuario(usuario);
paquete.addItemPaquete(linea);
log.info("ID: "+itemId[i].toString());
}
/* if (result.hasErrors()) {
model.addAttribute("titulo", "Formulario de paquete");
return "paquete/form";
}*/
usuarioService.savePaquete(paquete);
status.setComplete();
flash.addFlashAttribute("success","Paquete creado con éxito!");
return "redirect:listar";
}
}
and my form is
form_paquete

The error is happening in your PaqueteController class in the public String guardar method. Your controller is expecting a java.util.Long array (itemId) but is receiving a String instead.
First, you have to remove the [] in your #RequestParam(name="item_id[]").
Then, make sure that the Post requesting you are sending is like:
{
"item_id": [1,2,3],
...
}

in my form plantilla-items.html the name of td is item_id[]
The code in plantilla-items is:
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<body>
<table th:fragment="itemsPaquete" class="d-none">
<tbody id="plantillaItemsPaquete">
<tr id="row_{ID}">
<td class="d-none"><input type="hidden" value="{ID}"
name="item_id[]" /></td>
<td>{ID}</td>
<td>{NOMBRE}</td>
<td><a href="#" class="btn btn-danger btn-xs"
onclick="itemsHelper.eliminarLineaFactura({ID});">x</a></td>
</tr>
</tbody>
</table>
</body>
</html>

request
When check the request in the brownser, the first element is a string "{ID}" and no understand

how to find students Bydate (findByDate)

I went to develop an application to manage students in a university, I am looking for how to find students in relation to a date entered for that I have developed the following code lines:
1- Model student.java
package com.avatar.model;
import java.util.Date;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.persistence.JoinColumn;
#Entity
#Table(name = "Students")
public class Student{
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private int id;
private String nom;
private String prenom;
private String numTel;
private String mail;
#Temporal(TemporalType.DATE)
private Date dateCurrent;
#ManyToMany(fetch = FetchType.LAZY,
cascade = {
CascadeType.PERSIST,
CascadeType.MERGE
})
#JoinTable(name = "student_techno",
joinColumns = { #JoinColumn(name = "student_id") },
inverseJoinColumns = { #JoinColumn(name = "techno_id") })
private Set<Techno> techno = new HashSet<>();
public Student() {
}
#SuppressWarnings("unchecked")
public Student(String nom, String prenom,String numTel, String mail, Date dateCurrent,
) {
super();
this.nom = nom;
this.prenom = prenom;
this.numTel = numTel;
this.mail = mail;
this.dateCurrent = dateCurrent;
}
public String getNom() {
return nom;
}
public void setNom(String nom) {
this.nom = nom;
}
public String getPrenom() {
return prenom;
}
public void setPrenom(String prenom) {
this.prenom = prenom;
}
public String getNumTel() {
return numTel;
}
public void setNumTel(String numTel) {
this.numTel = numTel;
}
public String getMail() {
return mail;
}
public void setMail(String mail) {
this.mail = mail;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public Date getdateCurrent() {
return dateCurrent;
}
public void setdateCurrent(Date dateCurrent) {
this.dateCurrent = dateCurrent;
}
#Override
public String toString() {
return "Student[nom=" + nom + ", prenom=" + prenom + ", numTel=" + numTel + ", mail="
+ mail + ", dateCurrent=" + dateCurrent+ "]";
}
}
2- Controller
package com.avatar.web;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.avatar.dao.StudentDao;
import com.avatar.model.Student;
#CrossOrigin(origins = "http://localhost:4200")
#RestController
#RequestMapping("/avatar")
public class StudentController {
#Autowired
StudentDao studentdao;
#GetMapping(value = "/all-students")
public List<Student> listeDesStudent() {
List<Student> students= studentdao.findAll();
if (students.isEmpty())
throw new ProductNotFoundException("No student is registered in the database");
return students;
}
#GetMapping(value = "/all-students/dateCurrent/{dateCurrent}")
public List<Student> viewStudent(#PathVariable("dateCurrent") #DateTimeFormat(pattern = "yyyy-MM-dd") Date dateCurrent) {
Calendar c = Calendar.getInstance();
c.setTime(dateCurrent);
c.add(Calendar.DATE, 1);
dateCurrent = c.getTime();
return studentdao.findByDate(dateCurrent);
}
#GetMapping(value = "/all-students /techno/{nomTechno}")
List<Student > viewStudent(#PathVariable("nomTechno") String nomTechno) {
return studentdao.findDistinctByTechnoNomTechno(nomTechno);
}
#PostMapping(value = "/add-student")
public Student addStudent(#RequestBody Student student) {
Student studentAdded= studentdao.save(Student);
return studentAdded;
}
}
3- DAO
package com.avatar.dao;
import java.util.Date;
import java.util.List;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import com.avatar.model.Student;
#Repository
public interface StudentDao extends JpaRepository<Student, String> {
List<Student> findByDate(Date dateCurrent);
List<> findDistinctByTechnoNomTechno(String nomTechno);
}
4- applications.properties
server.port= 8080
# MySQL Properties
spring.jpa.show-sql = true
spring.datasource.url= jdbc:mysql://localhost:3306/avatar?serverTimezone=UTC&useLegacyDatetimeCode=false
spring.datasource.username=*****
spring.datasource.password=*****
# Hibernate Properties
spring.jpa.hibernate.ddl-auto=update
in my console i have:
Failed to create query for method public abstract java.util.List com.avatar.dao.StudentDao.findByDate(java.util.Date)! No property date found for type Student!

Please update DAO as per for below mentioned changes
If the field name is dateCurrent then findByDateCurrent.
package com.avatar.dao;
import java.util.Date;
import java.util.List;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import com.avatar.model.Student;
#Repository
public interface StudentDao extends JpaRepository<Student, String> {
List<Student> findByDateCurrent(Date dateCurrent);
List<> findDistinctByTechnoNomTechno(String nomTechno);
}

You are missing field name, in Entity class it is not the date by dateCurrent, thus your JPA should be findByDateCurrent

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