I am trying to add few initial values in the in memory h2 database with the base class:
package com.example.demo.user;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.validation.constraints.Past;
import javax.validation.constraints.Size;
import java.util.Date;
#Entity
public class User {
#Id
#GeneratedValue
private Integer id;
#Size(min=2,message = "Name length >= 2")
private String name;
#Past
private Date dob;
public User(Integer id, String name, Date dob) {
this.id = id;
this.name = name;
this.dob = dob;
}
#Override
public String toString() {
return "User{" +
"id=" + id +
", name='" + name + '\'' +
", dob=" + dob +
'}';
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Date getDob() {
return dob;
}
public void setDob(Date dob) {
this.dob = dob;
}
}
data.sql - insert into user values(1,sysdate(),'h');
schema.sql - create table user (id integer not null, dob timestamp, name varchar(255), primary key (id))
application.properties:
spring.jpa.show-sql=true
spring.h2.console.enabled=true
spring.datasource.url=jdbc:h2:mem:testdb
spring.datasource.driverClassName=org.h2.Driver
spring.datasource.username=sa
spring.datasource.password=
spring.data.jpa.repositories.bootstrap-mode=default
unable to see the data. Initialising through commandlinerunner worked. The log does not show the command being executed. but if i try removing schema.sql, throws error.
Spring will use those scripts schema.sql and data.sql and after that it will also use your entity layer and annotations to create-drop the schema again, meaning the previous changes with the scripts are overwritten.
Since you provide your own schema.sql , it means that you don't need the ORM vendor to create the schema for you based on the entity annotations that you have.
In this case you can procced and declare the property spring.jpa.hibernate.ddl-auto= none
This will not allow the ORM vendor to overwrite what you do with your scripts and only those scripts will be used when loading the application.
PS: spring.jpa.hibernate.ddl-auto= create-drop was already by default defined for you from spring automatically as you have an embedded database selected.
Related
I have a Spring Boot User class which always comes up with the error "java.sql.SQLException: Field 'id' doesn't have a default value". I have tried many times to provide a default value, both in the Java class and in the database table, but to no avail. And I have also switched from generation type = auto and = identity, but to no avail. Thank you very much for your help. Here is my Java Class and my Database Table:
package com.ykirby.myfbapp;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import org.springframework.beans.factory.annotation.Value;
import java.sql.Timestamp;
import java.util.Date;
#Entity // This tells Hibernate to make a table out of this class
public class User {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
#Value("#{User.id ?: 0}")
private int id = 12345;
#Column(name = "fbuserid")
private String fbuserid;
#Column(name = "apttime")
#Temporal(TemporalType.TIMESTAMP)
private Date apttime;
#Column(name = "apttitle")
private String apttitle;
#Column(name = "aptaddress")
private String aptaddress;
#Column(name = "aptlonglat")
private String aptlonglat;
#Column(name = "aptdetails")
private String aptdetails;
public String getFbuserid() {
return fbuserid;
}
public void setFbuserid(String fbuserid) {
this.fbuserid = fbuserid;
}
public Date getApttime() {
return apttime;
}
public void setApttime(Date apttime) {
this.apttime = apttime;
}
public String getApttitle() {
return apttitle;
}
public void setApttitle(String apttitle) {
this.apttitle = apttitle;
}
public String getAptaddress() {
return aptaddress;
}
public void setAptaddress(String aptaddress) {
this.aptaddress = aptaddress;
}
public String getAptlonglat() {
return aptlonglat;
}
public void setAptlonglat(String aptlonglat) {
this.aptlonglat = aptlonglat;
}
public String getAptdetails() {
return aptdetails;
}
public void setAptdetails(String aptdetails) {
this.aptdetails = aptdetails;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
}
The changes in your User entity class may sometimes not reflect your DB schema accurately. You can try one of these below solutions:
1. Update your DB schema manually by adding AUTO_INCREMENT attribute
ALTER TABLE `user` CHANGE COLUMN `id` `id` INT( 11 ) UNSIGNED NOT NULL AUTO_INCREMENT;
2. Drop the User table in your DB, and rerun the application
Make sure that spring.jpa.hibernate.ddl-auto is set to create or update. The default is none if you are NOT using an embedded/in-memory DBs like H2 database.
This configuration of Spring Data JPA will set Hibernate's hibernate.hbm2ddl.auto to the setting value. In our case, it is create or update.
You can read more about this in the below articles and docs.
Spring Boot reference - Database Initialization
What are the possible values of the Hibernate hbm2ddl.auto configuration and what do they do
In production, I suggest you not to use this option but instead use a database migration tool like Liquibase or Flyway and leave the spring.jpa.hibernate.ddl-auto configuration to be none.
More reads about this Hibernate: hbm2ddl.auto=update in production?
You should drop the existing database and re-generate it because sometimes changes done through the model don't reflect properly in the database. While re-generating the database you can scaffolding it with SchemaExport.
Does
#Column(name = "apttitle")
private String apttitle="default";
work?
I'm following the Learn Spring 5 etc on udemy and I'm at the part where we test our application. Everything worked fine till now, i was able to connect to the postgreSQL database and all but now I'm stuck at this test failing since 2 days.
I don't understand what is causing the Test to fail. The application run but the test doesn't. Here it is the test class:
package com.ghevi.dao;
import com.ghevi.pma.ProjectManagementApplication;
import com.ghevi.pma.dao.ProjectRepository;
import com.ghevi.pma.entities.Project;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.jdbc.Sql;
import org.springframework.test.context.jdbc.SqlGroup;
import org.springframework.test.context.junit4.SpringRunner;
import static org.junit.Assert.assertEquals;
#ContextConfiguration(classes= ProjectManagementApplication.class)
#RunWith(SpringRunner.class)
#DataJpaTest // for temporary databases like h2
#SqlGroup({
#Sql(executionPhase = Sql.ExecutionPhase.BEFORE_TEST_METHOD, scripts = {"classpath:schema.sql", "classpath:data.sql"}),
#Sql(executionPhase = Sql.ExecutionPhase.AFTER_TEST_METHOD, scripts = "classpath:drop.sql")
})
public class ProjectRepositoryIntegrationTest {
#Autowired
ProjectRepository proRepo;
#Test
public void ifNewProjectSaved_thenSuccess(){
Project newProject = new Project("New Test Project", "COMPLETE", "Test description");
proRepo.save(newProject);
assertEquals(5, proRepo.findAll().size());
}
}
And this is the stack trace:
https://pastebin.com/WcjNU76p
Employee class (don't mind the comments, they are probably garbage):
package com.ghevi.pma.entities;
import javax.persistence.*;
import java.util.List;
#Entity
public class Employee {
#Id
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "employee_seq") // AUTO for data insertion in the class projmanagapplication (the commented out part), IDENTITY let hibernate use the database id counter.
private long employeeId; // The downside of IDENTITY is that if we batch a lot of employees or projects it will be much slower to update them, we use SEQUENCE now that we have schema.sql (spring does batch update)
private String firstName;
private String lastName;
private String email;
// #ManyToOne many employees can be assigned to one project
// Cascade, the query done on projects it's also done on children entities
#ManyToMany(cascade = {CascadeType.DETACH, CascadeType.MERGE, CascadeType.REFRESH, CascadeType.PERSIST}, // Standard in the industry, dont use the REMOVE (if delete project delete also children) or ALL (because include REMOVE)
fetch = FetchType.LAZY) // LAZY is industry standard it loads project into memory, EAGER load also associated entities so it slows the app, so we use LAZY and call child entities later
//#JoinColumn(name="project_id") // Foreign key, creates a new table on Employee database
#JoinTable(name = "project_employee", // Merge the two table using two foreign keys
joinColumns = #JoinColumn(name="employee_id"),
inverseJoinColumns = #JoinColumn(name="project_id"))
private List<Project> projects;
public Employee(){
}
public Employee(String firstName, String lastName, String email) {
this.firstName = firstName;
this.lastName = lastName;
this.email = email;
}
public List<Project> getProjects() {
return projects;
}
public void setProjects(List<Project> projects) {
this.projects = projects;
}
/* Replaced with List<Project>
public Project getProject() {
return project;
}
public void setProject(Project project) {
this.project = project;
}
*/
public long getEmployeeId() {
return employeeId;
}
public void setEmployeeId(long employeeId) {
this.employeeId = employeeId;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
}
Also this is the schema.sql where i reference those sequences, since this file is run by the test, i have just noticed that IntelliJ mark some errors in this file. For example it mark red some spaces and the T of TABLE saying:
expected one of the following: EDITIONING FORCE FUNCTION NO OR PACKAGE PROCEDURE SEQUENCE TRIGGER TYPE VIEW identifier
CREATE SEQUENCE IF NOT EXISTS employee_seq;
CREATE TABLE IF NOT EXISTS employee ( <-- here there is an error " expected: "
employee_id BIGINT NOT NULL DEFAULT nextval('employee_seq') PRIMARY KEY,
email VARCHAR(100) NOT NULL,
first_name VARCHAR(100) NOT NULL,
last_name VARCHAR(100) NOT NULL
);
CREATE SEQUENCE IF NOT EXISTS project_seq;
CREATE (the error i described is here -->) TABLE IF NOT EXISTS project (
project_id BIGINT NOT NULL DEFAULT nextval('project_seq') PRIMARY KEY,
name VARCHAR(100) NOT NULL,
stage VARCHAR(100) NOT NULL,
description VARCHAR(500) NOT NULL
);
CREATE TABLE IF NOT EXISTS project_employee ( <--Here again an error "expected:"
project_id BIGINT REFERENCES project,
employee_id BIGINT REFERENCES employee
);
You never tell it to about the sequence, just what the generator is called
Try
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "employee_generator")
#SequenceGenerator(name = "employee_generator", sequenceName = "employee_seq", allocationSize = 1)
I had the same issue. Adding the below annotation resolved it. #SequenceGenerator(name = "employee_seq", allocationSize = 1)
Perhaps, there is something wrong with the generator definition in the employee entity.
The "generator" must be the "name" of the SequenceGenerator, not the name of other things such as the sequence. Maybe Because you gave the name of the sequence, and did not have a generator with that name it used the default preallocation which is 50.
Also, the strategy should be SEQUENCE, but isn't required if you define the generator, it is only relevant when you don't define the generator.
By default allocationSize parameter in SequenceGenerator is set to be 50. This problem arises when your sequence increment mismatches. You can either change the sequence increment value or assign allocationSize size as per your requirement.
I need to use raw SQL within a Spring Data Repository, is this possible? Everything I see around #Query is always entity based.
The #Query annotation allows to execute native queries by setting the nativeQuery flag to true.
Quote from Spring Data JPA reference docs.
Also, see this section on how to do it with a named native query.
YES, You can do this in bellow ways:
1. By CrudRepository (Projection)
Spring Data Repositories usually return the domain model when using query methods. However, sometimes, you may need to alter the view of that model for various reasons.
Suppose your entity is like this :
import javax.persistence.*;
import java.math.BigDecimal;
#Entity
#Table(name = "USER_INFO_TEST")
public class UserInfoTest {
private int id;
private String name;
private String rollNo;
public UserInfoTest() {
}
public UserInfoTest(int id, String name) {
this.id = id;
this.name = name;
}
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "ID", nullable = false, precision = 0)
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
#Basic
#Column(name = "name", nullable = true)
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
#Basic
#Column(name = "roll_no", nullable = true)
public String getRollNo() {
return rollNo;
}
public void setRollNo(String rollNo) {
this.rollNo = rollNo;
}
}
Now your Projection class is like below. It can those fields that you needed.
public interface IUserProjection {
int getId();
String getName();
String getRollNo();
}
And Your Data Access Object(Dao) is like bellow :
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.CrudRepository;
import java.util.ArrayList;
public interface UserInfoTestDao extends CrudRepository<UserInfoTest,Integer> {
#Query(value = "select id,name,roll_no from USER_INFO_TEST where rollNo = ?1", nativeQuery = true)
ArrayList<IUserProjection> findUserUsingRollNo(String rollNo);
}
Now ArrayList<IUserProjection> findUserUsingRollNo(String rollNo) will give you the list of user.
2. Using EntityManager
Suppose your query is "select id,name from users where roll_no = 1001".
Here query will return an object with id and name column. Your Response class is like bellow:
Your Response class is like this:
public class UserObject{
int id;
String name;
String rollNo;
public UserObject(Object[] columns) {
this.id = (columns[0] != null)?((BigDecimal)columns[0]).intValue():0;
this.name = (String) columns[1];
}
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 getRollNo() {
return rollNo;
}
public void setRollNo(String rollNo) {
this.rollNo = rollNo;
}
}
here UserObject constructor will get an Object Array and set data with the object.
public UserObject(Object[] columns) {
this.id = (columns[0] != null)?((BigDecimal)columns[0]).intValue():0;
this.name = (String) columns[1];
}
Your query executing function is like bellow :
public UserObject getUserByRoll(EntityManager entityManager,String rollNo) {
String queryStr = "select id,name from users where roll_no = ?1";
try {
Query query = entityManager.createNativeQuery(queryStr);
query.setParameter(1, rollNo);
return new UserObject((Object[]) query.getSingleResult());
} catch (Exception e) {
e.printStackTrace();
throw e;
}
}
Here you have to import bellow packages:
import javax.persistence.Query;
import javax.persistence.EntityManager;
Now your main class, you have to call this function. First get EntityManager and call this getUserByRoll(EntityManager entityManager,String rollNo) function. The calling procedure is given below:
Here is the Imports
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
get EntityManager from this way:
#PersistenceContext
private EntityManager entityManager;
UserObject userObject = getUserByRoll(entityManager,"1001");
Now you have data in this userObject.
Note:
query.getSingleResult() return a object array. You have to maintain the column position and data type with the query column position.
select id,name from users where roll_no = 1001
query return a array and it's [0] --> id and [1] -> name.
More info visit this thread and this Thread
Thanks :)
It is possible to use raw query within a Spring Repository.
#Query(value = "SELECT A.IS_MUTUAL_AID FROM planex AS A
INNER JOIN planex_rel AS B ON A.PLANEX_ID=B.PLANEX_ID
WHERE B.GOOD_ID = :goodId",nativeQuery = true)
Boolean mutualAidFlag(#Param("goodId")Integer goodId);
we can use createNativeQuery("Here Native SQL Query ");
for Example :
Query q = em.createNativeQuery("SELECT a.firstname, a.lastname FROM Author a");
List<Object[]> authors = q.getResultList();
This is how you can use in simple form
#RestController
public class PlaceAPIController {
#Autowired
private EntityManager entityManager;
#RequestMapping(value = "/api/places", method = RequestMethod.GET)
public List<Place> getPlaces() {
List<Place> results = entityManager.createNativeQuery("SELECT * FROM places p limit 10").getResultList();
return results;
}
}
It is also possible to use Spring Data JDBC, which is a fully supported Spring project built on top of Spring Data Commons to access to databases with raw SQL, without using JPA.
It is less powerful than Spring Data JPA, but if you want lightweight solution for simple projects without using a an ORM like Hibernate, that a solution worth to try.
I looking to understand how to internationalize JPA entity error message. I understand how its work into a controller using autowired MessageSource but in my case I want to do this into a JPA entity. I'm not intresting about using the same way as the controller issue because I think is not optimized to autowired the full MessageSource on this entity. If someone have a simple example to show me how its work with a simple entity like mine. My project using spring-boot 2.2 ; JPA ; and thymeleaf.
The entity I using:
package com.bananasplit.weblab2.entities;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.validation.constraints.NotEmpty;
import javax.validation.constraints.Pattern;
import javax.validation.constraints.Size;
#Entity
#Table(name = "todo")
public class Todo {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
#Column(name = "id")
private Long id;
#Column(name = "name", nullable = false)
#NotEmpty
#Size(min=2, max=30) // error message is already internationalized here with spring-boot
private String name;
#Column(name = "category", nullable = false)
#NotEmpty
#Pattern(regexp="(WORK|PERSONAL|SPECIAL)",
message="Category must be WORK or PERSONNAL or SPECIAL.") // here is the message I want to internationalize
private String category;
public Todo() {}
public Todo(String name, String category) {
this.name = name;
this.category = category;
}
#Override
public String toString() {
return String.format(
"Todo[id=%d, name='%s', category='%s']",
id, name, category);
}
public Long getId() {
return id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
}
}
By default Spring boot uses this ValidationMessages.properties but you can override by adding this file in resources.
#Size(min=2, max=30, message="{empty.todo.name")
private String name;
In ValidationMessages.properties file
empty.todo.name = Cannot be blank
If you want to manage which package messages should be scanned by Spring then should follow this link
I have added a foreign key as such:
#ManyToOne
#JoinColumn
private UserEntity userEntity;
And my table has these columns:
CREATE TABLE `web_course` (
`id` bigint(20) NOT NULL AUTO_INCREMENT,
`coursename` varchar(255) DEFAULT NULL,
`description` varchar(255) DEFAULT NULL,
`user_entity_user_id` bigint(20) DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `FK6eys4s4qx87rxo0ha68q05oc8` (`user_entity_user_id`),
CONSTRAINT `FK6eys4s4qx87rxo0ha68q05oc8` FOREIGN KEY (`user_entity_user_id`) REFERENCES `web_user` (`user_id`)
) ENGINE=InnoDB AUTO_INCREMENT=13 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
I would like to create a method to findByUserId in:
#Repository
public interface CourseRepository extends JpaRepository<CourseEntity, Long> {
I have tried several combinations in vain:
public CourseEntity findByUserId(int user_id)
public CourseEntity findByUserEntityUserId(int user_id)
public CourseEntity findBy_User_entity_user_id(int user_id)
I read that there is a naming convention but I can't seem to find the correct convention since I am getting:
Error creating bean with name 'courseController': Unsatisfied dependency expressed through field 'courseRepository';
Course class:
package com.finaly.projectback.entity;
import javax.persistence.Column;
import javax.persistence.Entity;
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 com.fasterxml.jackson.annotation.JsonIgnoreProperties;
#Entity
#Table(name = "web_course")
#JsonIgnoreProperties({ "hibernateLazyInitializer", "handler" })
public class CourseEntity {
#ManyToOne
#JoinColumn
private UserEntity userEntity;
public UserEntity getUserEntity() {
return userEntity;
}
public void setUserEntity(UserEntity userEntity) {
this.userEntity = userEntity;
}
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "id", updatable = false, nullable = false)
private long id;
#Column(name = "coursename")
private String coursename;
#Column(name = "description")
private String description;
public CourseEntity() {
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getCoursename() {
return coursename;
}
public void setCoursename(String coursename) {
this.coursename = coursename;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public CourseEntity(UserEntity userEntity, long id, String coursename, String description) {
super();
this.userEntity = userEntity;
this.id = id;
this.coursename = coursename;
this.description = description;
}
#Override
public String toString() {
return "CourseEntity [userEntity=" + userEntity + ", id=" + id + ", coursename=" + coursename + ", description="
+ description + "]";
}
}
Can someone point me in the right direction please?
Following code should work:
public CourseEntity findByUserEntity_UserId(int user_id)
Check logs to see if the course repository is instantiated or not. Error indicates controller can'be created because of the dependency issue.
Error creating bean with name courseController: Unsatisfied dependency expressed through field courseRepository