Data insertion in database using jpa issueing error

Data insertion in database using jpa issueing error - java

I am new to the JPA world. Here I have tried to make a simple POS. The problem is that when there is no predefined value in tables although the PK is auto-incremented, data is not being inserted into DB. But if I set a predefined row into the tables then there are no issues and data is being inserted successfully. please help me.
The following are my Java classes, and I am using Mysql for DB.
#Entity
#Table(name = "card_payment")
public class Card_payment {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
int id;
#OneToOne(cascade = CascadeType.ALL)
#JoinColumn(name = "order_id")
private Orders order;
#Column(name = "issuing_bank")
String issuing_bank;
#Column(name = "card_type")
String card_type;
#Column(name = "card_expiry_date")
String card_expiry_date;
#Column(name = "amount")
int amount;
public Card_payment() {
super();
}
public Orders getOrder() {
return order;
}
public void setOrder(Orders order) {
this.order = order;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getIssuing_bank() {
return issuing_bank;
}
public void setIssuing_bank(String issuing_bank) {
this.issuing_bank = issuing_bank;
}
public String getCard_type() {
return card_type;
}
public void setCard_type(String card_type) {
this.card_type = card_type;
}
public String getCard_expiry_date() {
return card_expiry_date;
}
public void setCard_expiry_date(String card_expiry_date) {
this.card_expiry_date = card_expiry_date;
}
public int getAmount() {
return amount;
}
public void setAmount(int amount) {
this.amount = amount;
}
}
#Entity
#Table(name = "customer")
public class Customer {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
int id;
#Column(name = "name")
String name;
#Column(name = "mobile_no")
long mobile_no;
#Column(name = "address")
String address;
#OneToMany(mappedBy = "customer", cascade = CascadeType.ALL,
fetch=FetchType.LAZY)
private List<Orders> orders;;
public Customer() {
super();
}
public List<Orders> getOrders() {
return orders;
}
public void setOrders(List<Orders> orders) {
this.orders = orders;
}
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 long getMobile_no() {
return mobile_no;
}
public void setMobile_no(long mobile_no) {
this.mobile_no = mobile_no;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
#Entity
#Table(name = "Item")
public class Item {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
int id;
#Column(name = "name")
String name;
#Column(name = "unit")
String unit;
#Column(name = "stock_quantity")
int stock_quantity;
#Column(name = "reorder_level")
int reorder_level;
#Column(name = "unit_price")
int unit_price;
#Column(name = "tax_percentage")
float tax_percentage;
#OneToMany(mappedBy = "item", cascade = CascadeType.ALL,
fetch=FetchType.LAZY)
private List<Orderline> orderLines;
public Item() {
super();
}
public List<Orderline> getOrderLines() {
return orderLines;
}
public void setOrderLines(List<Orderline> orderLines) {
this.orderLines = orderLines;
}
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 String getUnit() {
return unit;
}
public void setUnit(String unit) {
this.unit = unit;
}
public int getStock_quantity() {
return stock_quantity;
}
public void setStock_quantity(int stock_quantity) {
this.stock_quantity = stock_quantity;
}
public int getReorder_level() {
return reorder_level;
}
public void setReorder_level(int reorder_level) {
this.reorder_level = reorder_level;
}
public int getUnit_price() {
return unit_price;
}
public void setUnit_price(int unit_price) {
this.unit_price = unit_price;
}
public float getTax_percentage() {
return tax_percentage;
}
public void setTax_percentage(float tax_percentage) {
this.tax_percentage = tax_percentage;
}
}
#Entity
#Table(name = "OrderLine")
public class Orderline {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
int id;
#ManyToOne
#JoinColumn(name = "itemId")
private Item item;
#ManyToOne
#JoinColumn(name = "orderId")
private Orders orders;
#Column(name = "unit_cost")
float unit_cost;
#Column(name = "unit")
int unit;
#Column(name = "tax_percentage")
float tax_percentage;
#Column(name = "quantity")
int quantity;
#Column(name = "amount")
int amount;
#Column(name = "tax_amount")
float tax_amount;
#Column(name = "line_total")
int line_total;
public Orderline() {
super();
}
public Item getItem() {
return item;
}
public void setItem(Item item) {
this.item = item;
}
public Orders getOrders() {
return orders;
}
public void setOrders(Orders orders) {
this.orders = orders;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public float getUnit_cost() {
return unit_cost;
}
public void setUnit_cost(float unit_cost) {
this.unit_cost = unit_cost;
}
public int getUnit() {
return unit;
}
public void setUnit(int unit) {
this.unit = unit;
}
public float getTax_percentage() {
return tax_percentage;
}
public void setTax_percentage(float tax_percentage) {
this.tax_percentage = tax_percentage;
}
public int getQuantity() {
return quantity;
}
public void setQuantity(int quantity) {
this.quantity = quantity;
}
public int getAmount() {
return amount;
}
public void setAmount(int amount) {
this.amount = amount;
}
public float getTax_amount() {
return tax_amount;
}
public void setTax_amount(float tax_amount) {
this.tax_amount = tax_amount;
}
public int getLine_total() {
return line_total;
}
public void setLine_total(int line_total) {
this.line_total = line_total;
}
#Entity
#Table(name = "orders")
public class Orders {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
int id;
#ManyToOne
#JoinColumn(name = "customerId")
private Customer customer;
#Column(name = "order_date")
String order_date;
#Column(name = "delivery_address")
String delivery_address;
#Column(name = "total")
long total;
#OneToMany(mappedBy = "orders", cascade = CascadeType.ALL,
fetch=FetchType.LAZY)
private List<Orderline> orderlines;
#OneToOne(mappedBy = "order")
private Cash_payment cash_payment;
#OneToOne(mappedBy = "order")
private Card_payment card_payment;
#OneToOne(mappedBy = "order")
private Cheque_payment cheque_payment;
public Orders() {
super();
}
public Cash_payment getCash_payment() {
return cash_payment;
}
public void setCash_payment(Cash_payment cash_payment) {
this.cash_payment = cash_payment;
}
public Card_payment getCard_payment() {
return card_payment;
}
public void setCard_payment(Card_payment card_payment) {
this.card_payment = card_payment;
}
public Cheque_payment getCheque_payment() {
return cheque_payment;
}
public void setCheque_payment(Cheque_payment cheque_payment) {
this.cheque_payment = cheque_payment;
}
public List<Orderline> getOrderlines() {
return orderlines;
}
public void setOrderlines(List<Orderline> orderlines) {
this.orderlines = orderlines;
}
public Customer getCustomer() {
return customer;
}
public void setCustomer(Customer customer) {
this.customer = customer;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getOrder_date() {
return order_date;
}
public void setOrder_date(String order_date) {
this.order_date = order_date;
}
public String getDelivery_address() {
return delivery_address;
}
public void setDelivery_address(String delivery_address) {
this.delivery_address = delivery_address;
}
public long getTotal() {
return total;
}
public void setTotal(long total) {
this.total = total;
}
}
public class JPAExample {
private static EntityManager entityManager = EntityManagerUtil.getEntityManager();
public static void main(String[] args) {
JPAExample example = new JPAExample();
entityManager.getTransaction().begin();
Orders order = new Orders();
order.setOrder_date("2019/05/05");
order.setTotal(1000);
order.setDelivery_address("kolkata");
Item item = new Item();
item.setName("cream");
item.setReorder_level(10);
item.setUnit_price(10);
item.setUnit("kg");
item.setTax_percentage((float) 12.5);
item.setStock_quantity(20);
item.setReorder_level(5);
Orderline orderline = new Orderline();
orderline.setAmount(1);
orderline.setItem(item);
orderline.setLine_total(200);
orderline.setQuantity(1);
List<Orderline> orderlns = new ArrayList<>();
orderlns.add(orderline);
item.setOrderLines(orderlns);
Customer customer = new Customer();
customer.setId(1234);
customer.setName("Tanusha");
customer.setMobile_no(Long.valueOf("9609"));
customer.setAddress("u-86, garia");
orderline.setOrders(order);
List<Orderline> orderLinesList = new ArrayList<>();
orderLinesList.add(orderline);
order.setOrderlines(orderLinesList);
order.setCustomer(customer);
List<Orders> orderList = new ArrayList<>();
orderList.add(order);
customer.setOrders(orderList);
Card_payment cp = new Card_payment();
cp.setAmount(200);
cp.setCard_expiry_date("2019/05/05");
cp.setCard_type("visa");
cp.setIssuing_bank("SBI");
cp.setOrder(order);
order.setCard_payment(cp);
entityManager.merge(order);
try {
entityManager.getTransaction().commit();
} catch (Exception e) {
entityManager.getTransaction().rollback();
}
}
}

Related

Why my servicelaundry_id didn't insert on the table <Hibernate | Spring Boot>

I've created ManyToMany tables with extra column that's named reqserviceguest_details, then I've tested with filling on my jsp page form to insert the data. When the all data inserted, everything is fine except my servicelaundry_id. It's null and I have no idea why it happened.
ReqServiceGuestDetails.class
#Entity
#Table(name = "reqserviceguest_details")
public class ReqServiceGuestDetails {
#Id
#Column(name = "reqserviceguest_details_id")
#GeneratedValue(strategy = GenerationType.IDENTITY)
public int id;
#ManyToOne
#JoinColumn(name = "reqserviceguest_id")
private ReqServiceGuest reqServiceGuest;
#ManyToOne
#JoinColumn(name = "servicelaundry_id")
private ServiceLaundry serviceLaundry;
private int amount;
public ReqServiceGuestDetails() {
}
public ReqServiceGuestDetails(ReqServiceGuest reqServiceGuest, ServiceLaundry serviceLaundry, int amount) {
this.reqServiceGuest = reqServiceGuest;
this.serviceLaundry = serviceLaundry;
this.amount = amount;
}
public ReqServiceGuest getReqServiceGuest() {
return reqServiceGuest;
}
public void setReqServiceGuest(ReqServiceGuest reqServiceGuest) {
this.reqServiceGuest = reqServiceGuest;
}
public ServiceLaundry getServiceLaundry() {
return serviceLaundry;
}
public void setServiceLaundry(ServiceLaundry serviceLaundry) {
this.serviceLaundry = serviceLaundry;
}
public int getAmount() {
return amount;
}
public void setAmount(int amount) {
this.amount = amount;
}
}
ReqServiceGuest.class
#Entity
#Table(name = "reqserviceguest")
public class ReqServiceGuest {
#Id
#Column(name = "reqserviceguest_id", nullable = false)
#GeneratedValue(strategy = GenerationType.IDENTITY)
#GenericGenerator(name = "increment", strategy = "increment")
int id;
#Column(nullable = false, unique = true)
private String reqServiceGuestId;
private Date reqDate;
private Date pickDate;
private String type;
private String serviceStatus;
private String guestName;
private String guestTelNo;
#OneToMany(mappedBy = "reqServiceGuest", cascade = CascadeType.ALL)
private Set<ReqServiceGuestDetails> reqServiceGuestDetails = new HashSet<>();
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getReqServiceGuestId() {
return reqServiceGuestId;
}
public void setReqServiceGuestId(String reqServiceGuestId) {
this.reqServiceGuestId = reqServiceGuestId;
}
public Date getReqDate() {
return reqDate;
}
public void setReqDate(Date reqDate) {
this.reqDate = reqDate;
}
public Date getPickDate() {
return pickDate;
}
public void setPickDate(Date pickDate) {
this.pickDate = pickDate;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getServiceStatus() {
return serviceStatus;
}
public void setServiceStatus(String serviceStatus) {
this.serviceStatus = serviceStatus;
}
public String getGuestName() {
return guestName;
}
public void setGuestName(String guestName) {
this.guestName = guestName;
}
public String getGuestTelNo() {
return guestTelNo;
}
public void setGuestTelNo(String guestTelNo) {
this.guestTelNo = guestTelNo;
}
public Set<ReqServiceGuestDetails> getReqServiceGuestDetails() {
return reqServiceGuestDetails;
}
public void setReqServiceGuestDetails(Set<ReqServiceGuestDetails> reqServiceGuestDetails) {
this.reqServiceGuestDetails = reqServiceGuestDetails;
}
}
ServiceLaundry.class
#Entity
#Table(name = "servicelaundry")
public class ServiceLaundry {
#Id
#Column(name = "servicelaundry_id", nullable = false)
#GeneratedValue(strategy = GenerationType.IDENTITY)
#GenericGenerator(name = "increment", strategy = "increment")
int id;
#Column(nullable = false, unique = true)
private String serviceId;
private String serviceName;
private int price;
#OneToMany(mappedBy = "serviceLaundry")
private Set<ReqServiceGuestDetails> reqServiceGuestDetails = new HashSet<>();
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getServiceId() {
return serviceId;
}
public void setServiceId(String serviceId) {
this.serviceId = serviceId;
}
public String getServiceName() {
return serviceName;
}
public void setServiceName(String serviceName) {
this.serviceName = serviceName;
}
public int getPrice() {
return price;
}
public void setPrice(int price) {
this.price = price;
}
}
And this is form processor in a controller
#RequestMapping(path = "/savereqserviceguest", method = RequestMethod.GET)
public String processAddReqServiceGuestForm (ReqServiceGuest reqServiceGuest, #RequestParam Map<String, String> allParams) {
int latestId = reqServiceGuestService.getLatestReqServiceGuestId();
reqServiceGuest.setReqServiceGuestId(generateReqServiceGuestId(latestId));
reqServiceGuest.setServiceStatus("NP");
/*
for (Map.Entry<String, String> entry : allParams.entrySet()) {
if (entry.getKey().contains("service")) {
String getServiceId = String.valueOf(entry.getKey().charAt(7));
reqServiceGuest.getReqServiceGuestServiceLaundry().add();
}
}
reqServiceGuest.setReqServiceGuestServiceLaundry(serviceGuestDetails);
*/
ServiceLaundry service1 = serviceLaundryService.getServiceLaundry(1);
ServiceLaundry service2 = serviceLaundryService.getServiceLaundry(2);
ReqServiceGuestDetails reqServiceGuestDetails1 = new ReqServiceGuestDetails(reqServiceGuest, service1, 55);
ReqServiceGuestDetails reqServiceGuestDetails2 = new ReqServiceGuestDetails(reqServiceGuest, service2, 35);
reqServiceGuest.getReqServiceGuestDetails().add(reqServiceGuestDetails1);
reqServiceGuest.getReqServiceGuestDetails().add(reqServiceGuestDetails2);
Calendar cReqDate = Calendar.getInstance();
if (reqServiceGuest.getType().equals("Ordinary")) {
Date reqDate = cReqDate.getTime();
reqServiceGuest.setReqDate(reqDate);
Calendar cPickDate = Calendar.getInstance();
cPickDate.add(Calendar.DATE, 5);
Date pickDate = cPickDate.getTime();
reqServiceGuest.setPickDate(pickDate);
} else {
Date reqDate = cReqDate.getTime();
reqServiceGuest.setReqDate(reqDate);
Calendar cPickDate = Calendar.getInstance();
cPickDate.add(Calendar.DATE, 2);
Date pickDate = cPickDate.getTime();
reqServiceGuest.setPickDate(pickDate);
}
reqServiceGuestService.saveReqServiceGuest(reqServiceGuest);
return "redirect:/home";
}
And the final result is
Result

Spring MVC OneToMany, save from parent to child in on shot

orders.java
#Entity
#Table(name = "orders")
public class Order {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
#Column(name = "id")
private int id;
#Column(name = "created_at")
private Date createdAt;
#OneToMany
private List<Product> orderItem;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public Date getCreatedAt() {
return createdAt;
}
public void setCreatedAt(Date createdAt) {
this.createdAt = createdAt;
}
public List<Product> getOrderItem() {
return orderItem;
}
public void setOrderItem(List<Product> orderItem) {
this.orderItem = orderItem;
}
OrderProduct.java
#Entity
#Table(name = "orders_product")
public class OrderProduct {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
#Column(name = "id")
private int id;
#Column(name = "order_id")
private int orderId;
#Column(name = "orderItem_id")
private int orderItemId;
#Column(name = "quantity")
private int quantity;
public int getQuantity() {
return quantity;
}
public void setQuantity(int quantity) {
this.quantity = quantity;
}
public int getOrderId() {
return orderId;
}
public void setOrderId(int orderId) {
this.orderId = orderId;
}
public int getOrderItemId() {
return orderItemId;
}
public void setOrderItemId(int orderItemId) {
this.orderItemId = orderItemId;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
Product.java
#Entity
#Table(name = "product")
public class Product {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
#Column(name="id")
private int id;
#Column(name="code")
private String code;
#Column(name="name")
private String name;
#Column(name="price")
private double price;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
#Override
public String toString() {
return "Product [id=" + id + ", code=" + code + ", name=" + name + ", price=" + price + "]";
}
}
I try to save the from the order and set the orderItem, and only the order id
and product id that have been inserted to the table, I try to insert the quantity also, but don't know how to do it.

MySQLIntegrityConstraintViolationException: column "question_id" cannot be null error

i have two entity classes named Qa.java and Answeres.java
my Qa entity consists of lists of answers.
Qa.Java
#Entity
#Table(name = "qa")
public class Qa {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
private int id;
private String question;
private String type;
private String description;
private String param;
private int maxlength;
#OneToMany(mappedBy = "qa", cascade = CascadeType.ALL, fetch = FetchType.EAGER)
private List<Answers> answersList = new ArrayList<>();
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getQuestion() {
return question;
}
public void setQuestion(String question) {
this.question = question;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getParam() {
return param;
}
public void setParam(String param) {
this.param = param;
}
public int getMaxlength() {
return maxlength;
}
public void setMaxlength(int maxlength) {
this.maxlength = maxlength;
}
public List<Answers> getAnswersList() {
return answersList;
}
public void setAnswersList(List<Answers> answersList) {
this.answersList = answersList;
}
}
Answers.java
#Entity
#Table(name = "answers")
public class Answers {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
private String ans_label;
private int ans_value;
private int ans_weightage;
private int is_default;
#ManyToOne(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
#JoinColumn(name = "question_id", referencedColumnName = "id",nullable = false)
private Qa qa;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getAns_label() {
return ans_label;
}
public void setAns_label(String ans_label) {
this.ans_label = ans_label;
}
public int getAns_value() {
return ans_value;
}
public void setAns_value(int ans_value) {
this.ans_value = ans_value;
}
public int getAns_weightage() {
return ans_weightage;
}
public void setAns_weightage(int ans_weightage) {
this.ans_weightage = ans_weightage;
}
public int getIs_default() {
return is_default;
}
public void setIs_default(int is_default) {
this.is_default = is_default;
}
public Qa getQa() {
return qa;
}
public void setQa(Qa qa) {
this.qa = qa;
}
}
My controller from where i am trying to insert data.
TableDataController.java
#Controller
public class TabletDataController {
#Autowired
QaRepository qaRepository;
#RequestMapping(value = "/saveApiData", method = RequestMethod.GET)
public void saveApiData(){
Qa qa = new Qa();
qa.setParam("");
qa.setType("input_spinner");
qa.setDescription("");
qa.setQuestion("व्यक्तिको पहिलो नाम ?");
ArrayList<Answers> answersArrayList = new ArrayList<>();
Answers answers = new Answers();
answers.setAns_label("नेपाली");
answers.setAns_value(1);
answers.setAns_weightage(0);
answers.setIs_default(0);
answersArrayList.add(answers);
qa.setAnswersList(answersArrayList);
qaRepository.save(qa);
}
}
my qaRepository extends JpaRepository. so whenever i call this api i get an error of com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'question_id' cannot be null
what am i doing wrong?

You have a bidirectional OneToMany relationship, so you need to manually maintain both sides of the relationship. Here you are only setting the Qa side with qa.setAnswersList(answersArrayList);
You need to set the other side of your relationship manually. add:
answers.setQa(qa);
before you save your list

code as follow
public void saveApiData(){
Qa qa = new Qa();
qa.setParam("");
qa.setType("input_spinner");
qa.setDescription("");
qa.setQuestion("व्यक्तिको पहिलो नाम ?");
ArrayList<Answers> answersArrayList = new ArrayList<>();
Answers answers = new Answers();
answers.setAns_label("नेपाली");
answers.setAns_value(1);
answers.setAns_weightage(0);
answers.setIs_default(0);
answers.setQa(qa);
answersArrayList.add(answers);
qa.setAnswersList(answersArrayList);
qaRepository.save(qa);
}
when you save.you should Cascade save.Your annotations configure the relationship of the associated tables but also to associate them when they are saved

insert Hibernate Many to one in table having foreign key

I am facing problem while inserting. I want to save the details in result table without saving the foreign key parameters in parent table.
there are three pojo classes:
#Entity
#Table(name="course")
public class Course implements Serializable{
private static final long serialVersionUID = 1L;
#Id
#Column( name="id")
#GeneratedValue(strategy=GenerationType.AUTO)
private int id;
#Column(name="course_id",nullable = false)
private String course_id;
#Column( name="course_name")
private String course_name;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getCourse_id() {
return course_id;
}
public void setCourse_id(String course_id) {
this.course_id = course_id;
}
public String getCourse_name() {
return course_name;
}
public void setCourse_name(String course_name) {
this.course_name = course_name;
}
**#OneToMany(fetch = FetchType.EAGER, mappedBy = "course")
private Set<Result> result = new HashSet<Result>(0);
public Set<Result> getResult() {
return this.result;
}
public void setResult(Set<Result> result) {
this.result = result;
}**
}
The second class is Student.java
#Entity
#Table(name ="student")
public class Student implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
//Attribute----------------------------------
#Id
#Column(name="id")
#GeneratedValue(strategy=GenerationType.AUTO)
private int id;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
//Attribute----------------------------------
#Column(name="student_id", nullable=false)
private long student_id;
public long getStudent_id() {
return student_id;
}
public void setStudent_id(long student_id) {
this.student_id = student_id;
}
//Attribute----------------------------------
#Column(name="student_name")
private String student_name;
public String getStudent_name() {
return student_name;
}
public void setStudent_name(String student_name) {
this.student_name = student_name;
}
//Attribute----------------------------------
#Column(name="student_contact_number")
private long student_contact_number;
public long getStudent_contact_number() {
return student_contact_number;
}
public void setStudent_contact_number(long student_contact_number) {
this.student_contact_number = student_contact_number;
}
//This is for the foreign key element in the Result.java POJO class
#OneToMany(fetch = FetchType.LAZY,cascade = {CascadeType.ALL}, mappedBy = "student")
private Set<Result> result = new HashSet<Result>(0);
public Set<Result> getResult() {
return this.result;
}
public void setResult(Set<Result> result) {
this.result = result;
}
}
Third is Result.java which contains the foreign keys
#Entity
#Table(name="result")
public class Result implements Serializable{
private static final long serialVersionUID = 1L;
#Id
#Column(name="id")
#GeneratedValue(strategy = GenerationType.AUTO)
private int id;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
#Column(name="semester")
private int semester;
public int getSemester() {
return semester;
}
public void setSemester(int semester) {
this.semester = semester;
}
#Column(name="marks")
private int marks;
public int getMarks() {
return marks;
}
public void setMarks(int marks) {
this.marks = marks;
}
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "student_id", nullable = false)
private Student student;
public Student getStudent() {
return this.student;
}
public void setStudent(Student student_id) {
this.student = student_id;
}
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "course_id", nullable = false)
private Course course;
public Course getCourse() {
return this.course;
}
public void setCourse(Course course) {
this.course = course;
}
}
Now the code I used to insert is like this:
Session session;
Transaction t;
Query query;
Configuration cfg=new Configuration();
cfg.configure("hibernate.cfg.xml");
//#SuppressWarnings("deprecation")
SessionFactory factory=cfg.buildSessionFactory();
session=factory.openSession();
t=session.beginTransaction();
Result result;
Course cs;
Student st;
for(int i=0; i<jsrm.get(0).size(); i++)
{
result=new Result();
cs= new Course();
st=new Student();
cs.setCourse_id(jsrm.get(0).get(i).getcourse_id());
st.setStudent_id(Integer.parseInt(jsrm.get(0).get(i).getstudent_id()));
result.setSemester(Integer.parseInt(jsrm.get(0).get(i).getsemester()));
result.setMarks(Integer.parseInt(jsrm.get(0).get(i).getmarks()));
result.setCourse(cs);
result.setStudent(st);
session.save(result);
}
t.commit();//transaction is committed
session.close();
The error is
org.hibernate.TransientPropertyValueException: Not-null property references a transient value - transient instance must be saved before
current operation: Result.course -> Course
Is there a way to store the data without saving the course and student.

How to join Maps

How to join newMap detals in custMap.
Map<String, Customer> custMap= new HashMap<String,Customer>();
Map<String, DoCustomer> newMap= new HashMap<String,DoCustomer>();
for (Map.Entry<String, DoCustomer> cust: newMap.entrySet()) {
custMap.put(cust.getKey(),cust.getValue());
}
public class DoCustomer {
private Long id;
private String custName;
private String description;
private String status;
private List<DoCustomerBranch> doCustomerBranch=new ArrayList<DoCustomerBranch>
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getCustName() {
return custName;
}
public void setCustName(String custName) {
this.custName = custName;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
getter/setters of doCustomerBranch
}
#Entity
#Table(name = "CUSTOMER")
public class Customer implements Serializable{
private static final long serialVersionUID = 1L;
private Long id;
private String custName;
private String description;
private String createdBy;
private Date createdOn;
private String updatedBy;
private Date updatedOn;
private Set<CustomerBranch> customerBranch=new HashSet<CustomerBranch>
#Id
#GeneratedValue(generator = "CUSTOMER_SEQ")
#SequenceGenerator(name = "CUSTOMER_SEQ", sequenceName = "CUSTOMERN_SEQ", allocationSize = 1)
#Column(name = "ID")
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
#Column(name = "CUST_NAME",nullable=false)
public String getCustName() {
return custName;
}
public void setCustName(String custName) {
this.custName = custName;
}
#Column(name = "DESCRIPTION")
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
#Column(name = "CREATED_BY", length = 50)
public String getCreatedBy() {
return createdBy;
}
public void setCreatedBy(String createdBy) {
this.createdBy = createdBy;
}
#Temporal(TemporalType.TIMESTAMP)
#Column(name = "CREATED_ON")
public Date getCreatedOn() {
return createdOn;
}
public void setCreatedOn(Date createdOn) {
this.createdOn = createdOn;
}
#Column(name = "UPDATED_BY", length = 50)
public String getUpdatedBy() {
return updatedBy;
}
public void setUpdatedBy(String updatedBy) {
this.updatedBy = updatedBy;
}
#Temporal(TemporalType.TIMESTAMP)
#Column(name = "UPDATED_ON")
public Date getUpdatedOn() {
return updatedOn;
}
public void setUpdatedOn(Date updatedOn) {
this.updatedOn = updatedOn;
}
#OneToMany(cascade = { CascadeType.PERSIST, CascadeType.REMOVE }, fetch = FetchType.LAZY, mappedBy = "customer")
public Set<CustomerBranch> getCustomerBranch() {
return customerBranch;
}
public void setCustomerBranch(Set<CustomerBranch> customerBranch) {
this.customerBranch = customerBranch;
}
}
CustomerBranch
#Entity
#Table(name = "CUSTOMER_BRANCH")
public class CustomerBranch implements Serializable{
#Id
#GeneratedValue(generator = "CUSTOMER_BRANCH_SEQ")
#SequenceGenerator(name = "CUSTOMER_BRANCH_SEQ", sequenceName = "CUSTOMER_BRANCH_SEQ", allocationSize = 1)
#Column(name = "ID")
private Long id;
private String branchName;
private String branchAddress;
private Customer customer;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
#Column(name = "BRANCH_NAME",nullable=false)
public String getBranchName() {
return branchName;
}
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "MOBEE_CUSTOMER")
public Customer getCustomer() {
return customer;
}
public void setCustomer(Customer customer) {
this.customer = customer;
}
}

The problem with your code is that you want to put a DoCustomer in a Customer container. It only works if DoCustomer is a subclass of Customer.
Edit 1: You could use BeanUtils to convert a DoCustomer into a Customer. Here is a good tutorial.

Do you mean:
custMap.putAll(newMap)

As everyone else has pointed out, we need to know what DoCustomer is to be able to help.
But, from what you have given us, I'd suggest casting each DoCustomer to a Customer or, more correctly, making a new Customer from the fields of each DoCustomer.
Something like:
custMap.put(cust.getKey(), new Customer(cust.getValue().getId(), cust.getValue().getCustName(), and so on..));
inside your for loop.
I can see the customer class defined you have provided doesn't have a constructor, so naturally you would have to add one to it

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