Trying to return list from column named make causes error in console where column id is not found. The column named id is on the table but not sure why it is not recognized.
Car.java
package com.example.demo;
import javax.persistence.Entity;
import javax.persistence.Id;
#Entity
public class Car {
#Id
private String id;
private String make;
private String model;
private String year;
public Car() {
}
public Car(String id, String make, String model, String year) {
this.id = id;
this.make = make;
this.model = model;
this.year = year;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getMake() {
return make;
}
public void setMake(String make) {
this.make = make;
}
public String getModel() {
return model;
}
public void setModel(String model) {
this.model = model;
}
public String getYear() {
return year;
}
public void setYear(String year) {
this.year = year;
}
}
CarRepository.java
package com.example.demo;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import java.util.List;
public interface CarRepository extends JpaRepository<Car, String> {
#Query(value="SELECT make FROM car", nativeQuery=true)
List<Car> getAllMakes();
}
CarController.java
package com.example.demo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;
#Controller
public class CarController {
#Autowired
private CarService carService;
#Autowired
private CarRepository carRepository;
#GetMapping("/car")
public String carForm(Model model) {
model.addAttribute("car", new Car());
model.addAttribute("cars", carService.getAllCars());
return "car";
}
#PostMapping("/car")
carService.addCar(car);
return "redirect:/car";
}
#GetMapping("/list")
public String carMakeList(Model model){
model.addAttribute("list", carRepository.getAllMakes());
return "list";
}
}
list.html
<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
</head>
<body>
<h1>Car List</h1>
<table>
<thead>
<tr>
<th>Id</th>
<th>Make</th>
<th>Model</th>
<th>Year</th>
</tr>
</thead>
<tbody>
<tr th:if="${!list}">
<td colspan="2"> No Cars Available</td>
</tr>
<tr th:each="car : ${list}">
<td><span th:text="${car.make}">Make</span></td>
</tbody>
</table>
</body>
2019-08-30 10:12:31.008 ERROR 26538 --- [nio-8080-exec-1] o.h.engine.jdbc.spi.SqlExceptionHelper : Column 'id' not found.
2019-08-30 10:12:31.026 ERROR 26538 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.dao.InvalidDataAccessResourceUsageException: could not execute query; SQL [SELECT make FROM car]; nested exception is org.hibernate.exception.SQLGrammarException: could not execute query] with root cause
java.sql.SQLException: Column 'id' not found.
You need to specify *(all) in your SQL query:
public interface CarRepository extends JpaRepository<Car, String> {
#Query(value="SELECT * FROM car", nativeQuery=true)
List<Car> getAllMakes();
}
The problem is id field is required for Car entity, you can also try:
public interface CarRepository extends JpaRepository<Car, String> {
#Query(value="SELECT id,make FROM car", nativeQuery=true)
List<Car> getAllMakes();
}
For your current query to work, you can use JPA projections and change your code to:
public interface CarRepository extends JpaRepository<Car, String> {
#Query(value="SELECT make FROM car", nativeQuery=true)
List<String> getAllMakes();
}
Related
Program is executing Select query is also running in console but not displaying on page,please check the program and correct me thank you
Output
Output of the Program
product class
package com.ecom.Model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
#Entity
#Table(name="product")
public class Product {
#Id
#Column
private int id;
#Column
#NotNull
#Size(min=1,message="is required")
private String product_name;
#Column
#NotNull
#Size(min=1,message="is required")
private String manufacturer;
#Column
private int stock;
#Column
private String description;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getProduct_name() {
return product_name;
}
public void setProduct_name(String product_name) {
this.product_name = product_name;
}
public String getManufacturer() {
return manufacturer;
}
public void setManufacturer(String manufacturer) {
this.manufacturer = manufacturer;
}
public int getStock() {
return stock;
}
public void setStock(int stock) {
this.stock = stock;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public Product(int id, String product_name, String manufacturer, int stock, String description) {
super();
this.id = id;
this.product_name = product_name;
this.manufacturer = manufacturer;
this.stock = stock;
this.description = description;
}
public Product()
{}
#Override
public String toString() {
return "Product [id=" + id + ", product_name=" + product_name + ", manufacturer=" + manufacturer + ", stock="
+ stock + ", description=" + description + "]";
}
}
product controller class
In controller i have created the model to save the data into model with the help of Product reference calling getAllProduct method.
package com.ecom.Controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import com.ecom.DAO.ProductDAO;
import com.ecom.Model.Product;
#Controller
public class ProductController {
//injecting Dependecy
#Autowired
private ProductDAO productDAO;
#RequestMapping("/ProductList")
public String ListProducts(Model theModel)
{
List<Product> theProducts = productDAO.getAllProduct();
theModel.addAttribute("products",theProducts);
return "productlist";
}
#RequestMapping("/ProductForm")
public String ProductForm(Model theModel)
{
Product theProduct = new Product();
theModel.addAttribute("addProduct", theProduct);
return "productform";
}
#RequestMapping("/saveProduct")
public String saveProduct(#ModelAttribute("addProduct") Product theProdut)
{
productDAO.addProducts(theProdut);
return "productform";
}
}
Product Dao Implementation
package com.ecom.DAOImplementation;
import java.util.List;
import javax.transaction.Transactional;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.query.Query;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import com.ecom.DAO.ProductDAO;
import com.ecom.Model.Product;
#Repository("ProductDAO")
public class ProductImpl implements ProductDAO {
#Autowired
private SessionFactory sessionFactory;
#Transactional
public List<Product> getAllProduct() {
Session currentSession = sessionFactory.getCurrentSession();
Query<Product> theQuery = currentSession.createQuery("from Product",Product.class);
List<Product> products = theQuery.getResultList();
return products;
}
#javax.transaction.Transactional
public void addProducts(Product theProdut)
{
Session currentSession = sessionFactory.getCurrentSession();
System.out.println("Adding Product");
currentSession.save(theProdut);
System.out.println("Success");
}
}
Jsp page
<%# taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<table border="1px">
<tr>
<th>ID</th>
<th>Product Name</th>
<th>Manufacturer</th>
<th>Stock</th>
<th>Description</th>
</tr>
<c:forEach var="tempCustomer" items="${products}">
<tr>
<td> ${tempCustomer.id} </td>
<td> ${tempCustomer.product_name} </td>
<td> ${tempCustomer.manufacturer} </td>
<td> ${tempCustomer.stock} </td>
<td> ${tempCustomer.description} </td>
</tr>
</c:forEach>
</table>
</body>
</html>
Just tried to set this up by creating a sample list as shown below.
#RequestMapping("/ProductList")
public String ListProducts(Model theModel)
{
List<Product> theProducts = productDAO.getAllProduct();
Product product = new Product(1,"pro-1","man-1",10,"pro-1 desc");
theProducts.add(product);
product = new Product(2,"pro-2","man-2",10,"pro-2 desc");
theProducts.add(product);
product = new Product(3,"pro-3","man-3",10,"pro-3 desc");
theProducts.add(product);
product = new Product(4,"pro-4","man-4",10,"pro-4 desc");
theProducts.add(product);
product = new Product(5,"pro-5","man-5",10,"pro-5 desc");
theProducts.add(product);
theModel.addAttribute("products",theProducts);
return "productlist";
}
The JSP page productlist.jsp is as is. No changes done. I get the output as below.
You can perhaps try putting up debug statements to see if the theProducts is correctly populated.
have a very simple question on JSTL tags.
I am using spring to fetch data from back-end and display in the JSP.
Have the following code. I am getting the items of the for each tag printed in the console. But the same items are not getting printed/displayed inside the table rows.
<table id="table_id" class="display">
<thead>
<tr>
<th>Movie Name</th>
<th>Movie Rating</th>
</tr>
</thead>
<tbody>
<c:forEach items="${model.movieslist}" var="movie">
<tr>
<td>${movie.name}</td>
<td>${movie.rating}</td>
</tr>
</c:forEach>
</tbody>
My spring controller class
public ModelAndView handleRequest(HttpServletRequest arg0, HttpServletResponse arg1) throws Exception {
// TODO Auto-generated method stub
logger.info("returning hello view");
List<Movie> moviesList = DbManager.getInstance().getMovies();
ModelMap modelMap = new ModelMap();
modelMap.addAttribute("movieslist", moviesList);
return new ModelAndView("hello.jsp",modelMap);
}
Movie domain class
package springapp.domain;
import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;
#Document(collection = "movie")
public class Movie {
#Id
public String _id;
public String name;
public String getId() {
return _id;
}
public void setId(String _id) {
this._id = _id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public float getRating() {
return rating;
}
public void setRating(float rating) {
this.rating = rating;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
public float rating;
public String date;
#Override
public String toString() {
// TODO Auto-generated method stub
return name;
}
}
First, your jsp should contain the following taglib
<%# taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
Second, you don't need to get it using ${model.moviesList}, modify it as follows:
<c:forEach items="${movieslist}" var="movie">
I return an object instance of the following class from a Spring RestController method.
package x
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
#XmlRootElement(name = "invoices")
public class Invoices implements Serializable {
private Info info;
private Set<Customer> customers = new HashSet<>();
private List<Invoice> invoices = new ArrayList<>();
public Info getInfo() {
return info;
}
public void setInfo(Info info) {
this.info = info;
}
#XmlElement(name = "customer")
public Set<Customer> getCustomers() {
return customers;
}
public void setCustomers(Set<Customer> customers) {
this.customers = customers;
}
#XmlElement(name = "invoice")
public List<Invoice> getInvoices() {
return invoices;
}
public void setInvoices(List<Invoice> invoices) {
this.invoices = invoices;
}
}
The Controller method has the signature;
#RequestMapping(value = "/invoice", method = RequestMethod.GET, produces = "application/xml; charset=UTF-8")
This returns an XML with an unexpected div element and an attribute named slick_uniqueid on the top element. How do I get rid of this, and where does this come from?
<invoices slick-uniqueid="3">
<div>
<a id="slick_uniqueid" />
</div>
I found the answer to this myself. The raw response from the server does not include this attribute, nor the extra element. It's chrome that modifies the XML slightly when it displays it in-browser. The attribute and element is not there if I do a 'view source' either. Strange. I have never noticed that before
Basically I need a CRUD application for payments. Each payment is assigned to one account.
My jsp page shows the correct list of "account" objects but it does not set the selected account.
Question: How can I achieve a dropdown box with the assigned account pre-selected?
Question: The assignment (account to payment) works, but only with the below code in my PaymentDaoImpl.java (marked as workaround). Why is this the case?
PaymentDaoImpl.java
..
#Override
#Transactional
public int insertRow(Payment obj) {
// Session session = HibernateUtil.getSessionFactory().openSession();
Session session = sessionFactory.openSession();
// !!!! workaround?? If I don't do this, account won't be assigned
int accountId = obj.getAccount().getId();
Account account = (Account) session.get(Account.class, accountId);
obj.setAccount(account);
Transaction tx = session.beginTransaction();
session.saveOrUpdate(obj);
tx.commit();
Serializable id = session.getIdentifier(obj);
session.close();
return (Integer) id;
}
..
jsp:
<form:select path="account.id" >
<form:option value="-1" label="Select Account" />
<form:options items="${accountList}" itemValue="id" itemLabel="iban" />
</form:select>
Domain Account.java:
package com.beingjavaguys.domain;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.*;
import org.springframework.beans.factory.annotation.Autowired;
#Entity
public class Account {
#Id
#GeneratedValue
private int id;
private String iban;
private String bank;
private String beschreibung;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getIban() {
return iban;
}
public void setIban(String iban) {
this.iban = iban;
}
public String getBank() {
return bank;
}
public void setBank(String bank) {
this.bank = bank;
}
public String getBeschreibung() {
return beschreibung;
}
public void setBeschreibung(String beschreibung) {
this.beschreibung = beschreibung;
}
}
Domain Payment
package com.beingjavaguys.domain;
import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import org.springframework.beans.factory.annotation.Autowired;
#Entity
public class Payment {
private int id;
private Account account;
private float amount;
private String text;
private String comment;
#Id
#GeneratedValue
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
#ManyToOne(cascade = CascadeType.ALL, targetEntity = Account.class, fetch=FetchType.EAGER)
#JoinColumn(name="fk_account")
public Account getAccount() {
return account;
}
public void setAccount(Account account) {
this.account = account;
}
public float getAmount() {
return amount;
}
public void setAmount(float amount) {
this.amount = amount;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public String getComment() {
return comment;
}
public void setComment(String comment) {
this.comment = comment;
}
}
PaymentController.java
package com.beingjavaguys.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
import com.beingjavaguys.domain.Payment;
import com.beingjavaguys.services.AccountService;
import com.beingjavaguys.services.PaymentService;
#Controller
#RequestMapping("/payment")
public class PaymentController {
#Autowired
PaymentService dataService;
#Autowired
AccountService accountService;
#RequestMapping("form")
public ModelAndView getForm(#ModelAttribute Payment obj) {
ModelAndView mav = new ModelAndView("payment/form");
mav.addObject("accountList", accountService.getList());
return mav;
}
#RequestMapping("insert")
public ModelAndView insert(#ModelAttribute Payment obj) {
dataService.insertRow(obj);
return new ModelAndView("redirect:list");
}
#RequestMapping("list")
public ModelAndView getList() {
List objList = dataService.getList();
return new ModelAndView("payment/list","objList",objList);
}
#RequestMapping("delete")
public ModelAndView deleteUser(#RequestParam int id) {
dataService.deleteRow(id);
return new ModelAndView("redirect:list");
}
#RequestMapping("edit")
public ModelAndView editUser(#RequestParam int id,#ModelAttribute Payment obj) {
ModelAndView mav = new ModelAndView("payment/form");
Payment paymentObj = dataService.getRowById(id);
mav.addObject("accountList", accountService.getList());
mav.addObject("paymentObj", paymentObj);
return mav;
}
#RequestMapping("update")
public ModelAndView updateUser(#ModelAttribute Payment obj) {
dataService.updateRow(obj);
return new ModelAndView("redirect:list");
}
}
Can you have a look on my implementation of the AccountEditor? I need the AccountService to lookup the account, or not? However, I don't get the service instantiated here..
public class AccountEditor extends PropertyEditorSupport {
#Autowired
AccountService dataService; // == null ??
#Override
public void setAsText(String text) {
Account account = lookupAccount(text); // lookup account by accountId
// text
setValue(account);
}
private Account lookupAccount(String text) {
int id = Integer.parseInt(text);
return dataService.getRowById(id);
}
}
What you need is a PropertyEditor implementation to convert from a String accountId to an Account object. Then in your jsp you use the path form:select path="account" instead of form:select path="account.id"
Implement a PropertyEditor as follows
public class AccountEditor extends PropertyEditorSupport{
#Override
public void setAsText(String text){
Account account = lookupAccount(text); //lookup account by accountId text
setValue(account);
}
}
Then register your AccountEditor in your controller
#InitBinder
public void initBinder(WebDataBinder binder){
binder.registerCustomEditor(Account.class , new AccountEditor());
}
With the above changes you wont need your workaround. Your solution is only setting the id property of the account and not the whole object
Since I've decided to use same JSP for adding and editing posts, I just pass an attribute "saveUrl" which defines the action for my form in the JSP. Adding a new post works fine, but when editing a post, the object returned to the controller is missing all attributes except for the description.
What am I missing or doing wrong here?
Thanks for help!
My controller:
#Controller
public class BlogController {
private static final Logger logger = LoggerFactory.getLogger(BlogController.class);
#Autowired
private BlogPostManager bpManager;
#Autowired
private UserManager usrManager;
.....
#RequestMapping(value = "addPost", method = RequestMethod.GET)
public String addPost(Locale locale, Model model, Principal principal) {
model.addAttribute("post", new BlogPostEntity());
/** some more code here **/
return "addEditPost";
}
#RequestMapping(value = "addPostProcess", method = RequestMethod.POST)
public String addPostProcess(Locale locale, Model model, Principal principal, #ModelAttribute("post") BlogPostEntity blogPost) {
blogPost.setDate(new Date());
blogPost.setAuthor(usrManager.getUser(principal.getName()));
bpManager.addBlogPost(blogPost);
return "redirect:/latest";
}
#RequestMapping(value = "editPost/{id}", method = RequestMethod.GET)
public String editPost(Locale locale, Model model, Principal principal, #PathVariable Integer id) {
model.addAttribute("post", bpManager.getBlogPost(id));
model.addAttribute("username", getUsername(principal));
model.addAttribute("saveUrl", "");
return "addEditPost";
}
#RequestMapping(value = "editPost/{id}", method = RequestMethod.POST)
public String editPostProcess(Locale locale, Model model, Principal principal, #ModelAttribute("post") BlogPostEntity blogPost) {
bpManager.updateBlogPost(blogPost);
return "redirect:/latest";
}
/** some private methods **/
}
addEditPost.jsp
NOTE: this jsp is acting as a body of Apache tiles.
<h2>Create new post:</h2>
<form:form modelAttribute="post" action="${saveUrl}" method='POST'>
<table>
<tr>
<td><form:label path="title">Title:</form:label></td>
<td><form:input path="title"></form:input></td>
</tr>
<tr>
<td><form:label path="description">Description:</form:label></td>
<td><form:input path="description"></form:input></td>
</tr>
<tr>
<td><form:label path="text">Text:</form:label></td>
<td><form:input path="text"></form:input></td>
</tr>
<tr>
<td><input value="Save" type="submit"></td>
<td></td>
</tr>
</table>
</form:form>
The mapped BlogPost class:
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
#Entity
#Table(name = "BLOGPOST")
public class BlogPostEntity {
#Id
#GeneratedValue
#Column(name = "ID")
private int id;
#Column(name = "TITLE", nullable = false, length = 100)
private String title;
#Column(name = "DESCRIPTION", length = 500)
private String description;
#Column(name = "TEXT", length = 5000)
private String text;
#Column(name = "DATE")
private Date date;
#ManyToOne(targetEntity = UserEntity.class)
#JoinColumn(name = "authorid", referencedColumnName = "id")
private UserEntity author;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public Date getDate() {
return date;
}
public void setDate(Date date) {
this.date = date;
}
public int getId() {
return id;
}
public void setAuthor(UserEntity author) {
this.author = author;
}
public UserEntity getAuthor() {
return author;
}
}
DAO for blogpost:
import java.util.ArrayList;
import java.util.List;
import org.danizmax.simpleblog.entity.BlogPostEntity;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
#Repository("blogpostdao")
public class BlogPostDaoImpl implements BlogPostDao {
#Autowired
private SessionFactory sessionFactory;
#Override
public void addBlogPost(BlogPostEntity blogPost) {
getSession().persist(blogPost);
}
#Override
public void removeBlogPost(int id) {
BlogPostEntity entity = (BlogPostEntity) sessionFactory.getCurrentSession().load(BlogPostEntity.class, id);
if (entity != null) {
getSession().delete(entity);
}
}
#Override
#SuppressWarnings("unchecked")
public List<BlogPostEntity> latest() {
List<BlogPostEntity> result = new ArrayList<BlogPostEntity>();
try {
result = getSession().createQuery("FROM BlogPostEntity ORDER BY 'id' desc LIMIT 5;").list();
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
#Override
#SuppressWarnings("unchecked")
public List<BlogPostEntity> listPosts(int userId) {
List<BlogPostEntity> result = new ArrayList<BlogPostEntity>();
try {
result = getSession().createQuery("FROM UserEntity").list();
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
#Override
public void updateBlogPost(BlogPostEntity blogPost) {
blogPost = getBlogPost(blogPost.getId());
getSession().update(blogPost);
}
#Override
public BlogPostEntity getBlogPost(int id) {
return (BlogPostEntity) getSession().get(BlogPostEntity.class, id);
}
private Session getSession() {
return sessionFactory.getCurrentSession();
}
}
UPDATE: I've been experimenting a bit and tried method from HERE, but the object returned to the controler was still empty.
Then I changed the saveURL in JSP to (I read it might be important HERE):
<c:url var="addUrl" value="/secure/postProcess"/>
<form:form modelAttribute="post" action="${addUrl}" method='POST'>
and now the object is filled, only the id is still empty. So there is something probably wrong with the JSP.