Followed this question but did not work
Have two entities Account and UserTransaction
Account.java
#Entity
#Access(AccessType.FIELD)
public class Account {
#Id
private Integer accountNumber;
private String holderName;
private String mobileNumber;
private Double balanceInformation;
public Account(Integer accountNumber, String holderName, String mobileNumber, Double balanceInformation) {
this.accountNumber = accountNumber;
this.holderName = holderName;
this.mobileNumber = mobileNumber;
this.balanceInformation = balanceInformation;
}
}
UserTransaction.java
#Entity
#Access(AccessType.FIELD)
#Table(name = "user_transaction")
public class Transaction {
#Id
private Long transactionId;
#ManyToOne
#JoinColumn(name = "accountNumber")
private Account accountNumber;
private Double transactionAmount;
#Column(nullable = false, columnDefinition = "TINYINT", length = 1)
private Boolean transactionStatus;
private String statusMessage;
#Temporal(TemporalType.TIMESTAMP)
#Column(name="timestamp", columnDefinition="TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP")
private Date timestamp;
public Transaction(Long transactionId, Account account,
Double transactionAmount,
Boolean transactionStatus,
String statusMessage) {
this.transactionId = transactionId;
this.accountNumber = account;
this.transactionAmount = transactionAmount;
this.transactionStatus = transactionStatus;
this.statusMessage = statusMessage;
}
}
and My TransactionRepository is as follows
#RepositoryRestResource(collectionResourceRel = "transactions", path = "transactions")
public interface JpaTransactionRepository extends JpaRepository<Transaction, Long>, TransactionRepository {
#Query(value = "select t from Transaction t where t.accountNumber.accountNumber = :accountNumber")
Iterable<Transaction> findByAccountNumber(#Param("accountNumber") Integer accountNumber);
}
I have constructed a json as specified in the stackoverflow post at the top
{
"transactionId" : "3213435454342",
"transactionAmount" : 5.99,
"transactionStatus" : true,
"statusMessage" : null,
"timestamp" : "2017-03-09T05:11:41.000+0000",
"accountNumber" : "http://localhost:8080/accounts/90188977"
}
when I try to execute POST with the above json I get
Caused by: java.sql.SQLIntegrityConstraintViolationException: Column 'account_number' cannot be null
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:533)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:513)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:115)
at com.mysql.cj.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:1983)
How do I save an entity that has relationships with Spring data rest????
The problem is that with #JoinColumn(name = "accountNumber") you would hard-code the column name in database as accountNumber. Normally the naming-strategy would add embedded underscores instead of having mixed case column names.
So it should work if you change the line to #JoinColumn(name = "account_number").
Related
Today I came across a weird bug while trying to test a JPA update query and I'm wondering if this a SpringBoot bug.
I have the following entities
An Entry entity
#Entity
#Data
#AllArgsConstructor
#NoArgsConstructor(access = AccessLevel.PROTECTED, force = true)
public class Entry {
#Id
private String id;
#ManyToOne(targetEntity = User.class)
#JoinColumn(referencedColumnName = "username")
#NotNull
private final User username;
#Enumerated(EnumType.STRING)
#NotNull
private Type type;
#ManyToOne(targetEntity = Category.class)
#JoinColumns({#JoinColumn(referencedColumnName = "name"),#JoinColumn(referencedColumnName = "type"),#JoinColumn(referencedColumnName = "username")})
#NotNull
private Category category;
#Size(max = 45)
#NotBlank
private String description;
#NotNull
private Double amount;
#NotNull
private final Date createdAt;
private Timestamp lastUpdate;
#NotNull
private Boolean isDeleted;
public enum Type{
Income,Expense
}
}
A Category entity with a composite key
#Entity
#NoArgsConstructor(access = AccessLevel.PROTECTED, force = true)
#Setter
#Getter
#EqualsAndHashCode(of = {"id"})
#ToString(of = {"id"})
public class Category {
#EmbeddedId
private CategoryId id;
private final Timestamp createdAt = Timestamp.from(Instant.now());
#ManyToOne(targetEntity = User.class)
#JoinColumn(referencedColumnName = "username")
private final User user;
#OneToMany(cascade = CascadeType.ALL,mappedBy = "category")
private List<Entry> entries;
public Category(String name, Type type, User user){
this.id = new CategoryId(name,type,user.getUsername());
this.user = user;
}
}
A CategoryID that is the embeddable composite key of the Category entity
#Data
#Embeddable
#AllArgsConstructor
#NoArgsConstructor(access = AccessLevel.PROTECTED)
#EqualsAndHashCode(of = {"name","type","username"})
public class CategoryId implements Serializable {
private String name;
#Enumerated(EnumType.STRING)
private Type type;
private String username;
}
The following repository
#Repository
public interface EntryRepository extends JpaRepository<Entry, String> {
Optional<Entry> findEntryById(String id);
#Modifying(clearAutomatically = true, flushAutomatically = true)
#Query(value = "UPDATE Entry e SET e.username = :username, e.type = :type, e.category = :category, e.description = :description, e.amount = :amount, e.createdAt = :date, e.lastUpdate = :lastUpdate, e.isDeleted = :isDeleted WHERE e.id = :id")
void update(#Param("id") String id,
#Param("username") User username,
#Param("type") Entry.Type type,
#Param("category") Category category,
#Param("description") String description,
#Param("amount") Double amount,
#Param("date") Date date,
#Param("lastUpdate") Timestamp lastUpdate,
#Param("isDeleted") Boolean isDeleted);
}
And finally the following Unit Test
#Test
void update() {
//given
User testUser = userRepository.save(new User("testUser#test.com","000000000000000000000000000000000000000000000000000000000000"));
Category testCategory = categoryRepository.save(new Category("Test Category", Entry.Type.Income,testUser));
Entry testEntry = new Entry("testEntry",testUser, Entry.Type.Income,
testCategory, "test",
0.0, new Date(343), from(now()), false);
System.out.println(testCategory);
entryRepositoryUnderTest.save(testEntry);
//when
entryRepositoryUnderTest.update("testEntry",testUser,Expense,testCategory,"testUpdated",1.0,new Date(346), from(now()),true);
Optional<Entry> actual = entryRepositoryUnderTest.findEntryById("testEntry");
System.out.println(actual.get().getCategory());
//then
assertThat(actual.get().getUsername()).isEqualTo(testUser);
assertThat(actual.get().getType()).isEqualTo(Expense);
assertThat(actual.get().getCategory()).isEqualTo(testCategory);
assertThat(actual.get().getDescription()).isEqualTo("testUpdated");
assertThat(actual.get().getAmount()).isEqualTo(1.0);
assertThat(actual.get().getIsDeleted()).isEqualTo(true);
}
When I run the test it fails and I get the following error message:
could not execute update query; SQL [update entry set username_username=?, type=?,category_name=?=category_type=?, description=?, amount=?, created_at=?, last_update=?, is_deleted=? where id=?]; nested exception is org.hibernate.exception.DataException: could not execute update query
As you can see here when SpringBoot is trying to produce a SQL query statement from my #Query parameter it can not properly extract the Category field from the parameters and inject it's composite embeddable key into the SQL statement. It has no problem extracting the User parameter because the User is an entity with an id that is not composite.
Is this a SpringBoot bug or am I missing something?
EDIT:
This is the structure of the database
I am studying spring boot data using this API SWAPI, I did almost things but now I dont know how to map the relationship about two lists, above you can see my code and entities.
Entity Film
#Data
#Entity
public class Film extends Persistent<Long> {
private String title;
#JsonProperty(value = "episode_id")
private int episodeId;
#JsonProperty(value = "opening_crawl")
#Column(columnDefinition = "CLOB")
private String openingCrawl;
private String director;
private String producer;
#JsonDeserialize(converter = StringToLocalDateConverter.class)
#JsonProperty(value = "release_date")
private LocalDate releaseDate;
#JsonDeserialize(converter = ApiURLToEntitiesConverter.class)
#ManyToMany(mappedBy = "films")
private List<Person> characters;
#JsonDeserialize(converter = StringToLocalDateTimeConverter.class)
private LocalDateTime created;
#JsonDeserialize(converter = StringToLocalDateTimeConverter.class)
private LocalDateTime edited;
private String url;
}
Entity Person
#Data
#Entity
public class Person extends Persistent<Long> {
private String name;
private String height;
private String mass;
#JsonProperty(value = "hair_color")
private String hairColor;
#JsonProperty(value = "skin_color")
private String skinColor;
#JsonProperty(value = "eye_color")
private String eyeColor;
#JsonProperty(value = "birth_year")
private String birthYear;
private String gender;
#JsonDeserialize(converter = ApiURLToEntityConverter.class)
#JoinColumn(name = "planet_id", foreignKey = #javax.persistence.ForeignKey(name = "none"))
#OneToOne(optional = true)
private Planet homeworld;
#JsonDeserialize(converter = ApiURLToEntitiesConverter.class)
#ManyToMany
#JoinTable(
name = "film_person",
joinColumns = #JoinColumn(name = "film_fk", referencedColumnName = "id", nullable = true),
inverseJoinColumns = #JoinColumn(name = "person_fk", referencedColumnName = "id", nullable = true))
private List<Film> films;
#JsonDeserialize(converter = StringToLocalDateTimeConverter.class)
private LocalDateTime created;
#JsonDeserialize(converter = StringToLocalDateTimeConverter.class)
private LocalDateTime edited;
private String url;
}
I am trying to use the spring jpa method to saveAll
#Override
public List<T> insertAll(List<T> entities) {
for (Persistent entity : entities) {
Set<ConstraintViolation<Persistent>> violations = validator.validate(entity);
if (violations != null && !violations.isEmpty()) {
throw new ConstraintViolationException(violations);
}
}
return repository.saveAll(entities);
}
Converter Method
#Override
public List convert(List<String> s) {
if (s == null || s.isEmpty()) {
return null;
}
List objetos = new LinkedList();
for (String url : s) {
if (url.contains("people")) {
objetos.add(Util.getPerson(url));
}
if (url.contains("planets")) {
objetos.add(Util.getPlanet(url));
}
if (url.contains("starships")) {
objetos.add(Util.getStarship(url));
}
if (url.contains("vehicles")) {
objetos.add(Util.getVehicle(url));
}
if (url.contains("species")) {
objetos.add(Util.getSpecie(url));
}
}
return objetos;
}
}
Util method
public static Person getPerson(String characterApiUrl) {
if (characterApiUrl == null || characterApiUrl.isEmpty()) {
return null;
}
Person person = new Person();
person.setId(StringUtil.getIdEntity(characterApiUrl, "people/"));
return person;
}
The relationship table is being created but no populated
I use DTO and modelMapper in order not to make visible some fields.
I have a CategoryEntity that can have subcategories
public class CategoryEntity {
#Id
#GeneratedValue(strategy= GenerationType.IDENTITY)
private Long id;
#Column(length = 30, nullable = false)
private String categoryKeyId;
#Column(nullable = false)
private String name;
#ManyToOne(optional = true, fetch = FetchType.LAZY)
#JoinColumn(name="parent_id", nullable=true)
private CategoryEntity parentCategory;
// allow to delete also subcategories
#OneToMany(mappedBy="parentCategory", cascade = CascadeType.ALL)
private List<CategoryEntity> subCategories;
}
When i create a category I use a model:
#Getter #Setter
public class CategoryRequestModel {
private String name;
private String parentCategoryKeyId;
}
In this model i want parentCategoryKeyId to match with the categoryKeyId of the parent.
For example if i create a "top" category :
{
"name": "topCategory"
}
It returns me :
{
"categoryKeyId": "jUcpO27Ch2YrT2zkLr488Q435F8AKS",
"name": "topCategory",
"subCategories": null
}
When i do this :
{
"name": "sub",
"parentCategoryKeyId": "jUcpO27Ch2YrT2zkLr488Q435F8AKS"
}
In my Controller, i pass the rest object to a DTO Layer which calls a service :
public CategoryRestResponseModel createCategory(#RequestBody CategoryRequestModel categoryRequestModel) {
CategoryRestResponseModel returnValue = new CategoryRestResponseModel();
if( categoryRequestModel.getName().isEmpty())
throw new NullPointerException(ErrorMessages.MISSING_REQUIRED_FIELDS.getErrorMessage());
ModelMapper modelMapper = new ModelMapper();
CategoryDto categoryDto = modelMapper.map(categoryRequestModel, CategoryDto.class);
CategoryDto createdCategory = categoryService.createCategory(categoryDto);
returnValue = modelMapper.map(createdCategory, CategoryRestResponseModel.class);
return returnValue;
}
My CategoryDto is a basic POJO :
#Getter #Setter
public class CategoryDto implements Serializable {
#Getter(AccessLevel.NONE)
private static final long serialVersionUID = 1L;
private String categoryKeyId;
private String parentCategoryKeyId;
private String name;
private CategoryDto parentCategory;
private List<CategoryDto> subCategories;
}
In my Service :
public CategoryDto createCategory(CategoryDto categoryDto) {
//1. Create an empty object to return
System.out.println("Hello World");
CategoryDto returnValue = new CategoryDto();
System.out.println("CategoryDto: " + categoryDto);
// check if category exists
if (categoryRepository.findByName(categoryDto.getName()) != null)
throw new ApplicationServiceException("Record already in Database");
ModelMapper modelMapper = new ModelMapper();
CategoryEntity categoryEntity = modelMapper.map(categoryDto, CategoryEntity.class);
// Generate categoryKeyId
String categoryKeyId = utils.generateCategoryKeyId(30);
categoryEntity.setCategoryKeyId(categoryKeyId);
System.out.println("categoryDto parentCategory: " + categoryDto.getParentCategory());
System.out.println("CategoryDto: " + categoryDto);
if(categoryDto.getParentCategoryKeyId() != null) {
CategoryEntity parentCategory = categoryRepository.findByCategoryKeyId(categoryDto.getParentCategoryKeyId());
categoryEntity.setParentCategory(parentCategory);
System.out.println("CategoryEntity: " + categoryEntity);
System.out.println("parentCategory: " + parentCategory);
}
CategoryEntity storedCategory = categoryRepository.save(categoryEntity);
returnValue = modelMapper.map(storedCategory, CategoryDto.class);
return returnValue;
}
My issue is that I would like to save the subcategory and retrieve the ID that match the categoryKeyId ...
In the database my entry should be like this
My First entry should have:
id = 1 - parent_id = null, category_key_id = jUcpO27Ch2YrT2zkLr488Q435F8AKS, name = topCategory ...
AND :
id = 2 - parent_id = 1 , category_key_id = "another generated key", name= sub
Unfortunatelly I just persist the id, the categorykeyid and the name.
I removed id from CategoryDto and i obtain : 1) Converter org.modelmapper.internal.converter.NumberConverter#348fc3d8 failed to convert java.lang.String to java.lang.Long.
I solved it in a "dirty" way.
I just changed my object in entry and added a long id.
It gives me :
#Getter #Setter
public class CategoryRequestModel {
private Long id;
private String name;
private String parentCategoryKeyId;
}
In our spring boot Restful WebService, we have two master tables with many-to-many relationship between them. But in the transaction table, we want one extra field (current_time) as part of the embedded key other than the primary keys of the two tables. Now, we’ve created a separate class for defining embedded primary key using #Embeddable. Now, while inserting one transaction row to transaction table using Spring JPA, I am manually setting the primary keys in the corresponding entity and calling the save method on corresponding repository. But It is giving me ConstraintViolationException as the current_time is going with null value even if I have manually set it. Any help would be highly appreciated.
First Entity is as follows :
#Entity
#Table(name = "project")
public class Project {
#Id
#GenericGenerator(name = "projectid", strategy = "com.sample.upload.entity.ProjectIDGenerator")
#GeneratedValue(generator = "projectid")
#Column(name = "projectid")
private String projectID;
#Column(name = "project_name")
private String projectName;
#Column(name = "project_descr")
private String projectDesc;
#Column(name = "project_input_path")
private String projectPath;
#Column(name = "project_creation_time")
private Calendar projectCreationTime;
#ManyToMany(cascade = CascadeType.ALL)
#JoinTable(name = "project_migration", joinColumns = #JoinColumn(name = "projectid", referencedColumnName = "projectid"), inverseJoinColumns = #JoinColumn(name = "migratorid", referencedColumnName = "migratorid"))
private List<Migrator> migrators;
#Column(name = "account_name")
private String accountName;
#Column(name = "account_group")
private String accountGroup;
public String getProjectID() {
return projectID;
}
public void setProjectID(String projectID) {
this.projectID = projectID;
}
public String getAccountName() {
return accountName;
}
public void setAccountName(String accountName) {
this.accountName = accountName;
}
public String getAccountGroup() {
return accountGroup;
}
public void setAccountGroup(String accountGroup) {
this.accountGroup = accountGroup;
}
public String getProjectName() {
return projectName;
}
public void setProjectName(String projectName) {
this.projectName = projectName;
}
public String getProjectDesc() {
return projectDesc;
}
public void setProjectDesc(String projectDesc) {
this.projectDesc = projectDesc;
}
public String getProjectPath() {
return projectPath;
}
public void setProjectPath(String projectPath) {
this.projectPath = projectPath;
}
public Calendar getProjectCreationTime() {
return projectCreationTime;
}
public void setProjectCreationTime(Calendar projectCreationTime) {
this.projectCreationTime = projectCreationTime;
}
public List<Migrator> getMigrators() {
return migrators;
}
public void setMigrators(List<Migrator> migrators) {
this.migrators = migrators;
}
}
Second Entity :
#Entity
#GenericGenerator(name = "generatorName", strategy = "increment")
#Table(name = "migrator")
public class Migrator {
#Id
#GeneratedValue(generator = "generatorName")
#Column(name = "migratorid")
private String migratorId;
#Column(name = "src_tech_name")
private String srcTechName;
#Column(name = "dest_tech_name")
private String destTechName;
#Column(name = "migrator_name")
private String migratorName;
#Column(name = "migrator_type")
private String migratorType;
public String getMigratorId() {
return migratorId;
}
public void setMigratorId(String migratorId) {
this.migratorId = migratorId;
}
public String getSrcTechName() {
return srcTechName;
}
public void setSrcTechName(String srcTechName) {
this.srcTechName = srcTechName;
}
public String getDestTechName() {
return destTechName;
}
public void setDestTechName(String destTechName) {
this.destTechName = destTechName;
}
public String getMigratorName() {
return migratorName;
}
public void setMigratorName(String migratorName) {
this.migratorName = migratorName;
}
public String getMigratorType() {
return migratorType;
}
public void setMigratorType(String migratorType) {
this.migratorType = migratorType;
}
#Override
public String toString() {
return "Technology [migratorId=" + migratorId + ", srcTechName=" + srcTechName + ", destTechName="
+ destTechName + ", migratorName=" + migratorName + ", migratorType=" + migratorType + "]";
}
}
The join (transaction) table's entity :
#Entity
#Table(name = "project_migration")
public class ProjectMigration {
#EmbeddedId
private ProjectMigrationID migrationId;
#Column(name ="migration_finish_time")
private Calendar migrationFinishTime;
#Column(name ="time_in_millis_for_migration")
private long timeInMillisForMigration;
#Column(name ="migration_status")
private String migrationStatus;
#Column(name ="migrated_codebase_path")
private String migratedCodeBasePath;
The embedded Primary Key class is as follows:
#Embeddable
public class ProjectMigrationID implements Serializable {
private static final long serialVersionUID = -3623993529011381924L;
#Column(name = "projectid")
private String projectId;
#Column(name = "migratorid")
private String migratorId;
#Column(name = "migration_start_time")
private Calendar migrationStartTime;
public ProjectMigrationID() {
}
public ProjectMigrationID(String projectId, String migratorId, Calendar migrationStartTime) {
this.projectId = projectId;
this.migratorId = migratorId;
this.migrationStartTime = migrationStartTime;
}
The snippet from service Class :
for (String migratorId : data.getMigratorIds()) {
Migrator migrator = migratorRepository.findByMigratorId(migratorId);
migrators.add(migrator);
}
if (projectId != null) {
project = projectRepository.findByProjectID(projectId);
System.out.println(project==null);
project.setMigrators(migrators);
System.out.println("I am here");
if (project != null) {
//project.setMigrationStatus("In Progress");
ProjectMigrationID pmId = new ProjectMigrationID();
pmId.setProjectId(project.getProjectID());
pmId.setMigratorId(project.getMigrators().get(0).getMigratorId());
pmId.setMigrationStartTime(new GregorianCalendar());
ProjectMigration pm = new ProjectMigration();
pm.setMigrationId(pmId);
pm.setMigrationStatus("Pending");
projectMigrationRepository.save(pm);
That's because of the #JoinTable where the date is not included and it skips the insertion. If you include a column with all the primary keys needed, it will work as expected.
Only the columns mapped via #JoinTable will be included during insertion or update (defaults to true when mapped)
Either include the date time column in the Project class or use association without #JoinTable.
I'm editing via mobile. So please ignore typos if any.
Post class
one to many mapping
Composite primary key using id
I am getting null pointer exception when I make get request for getting comments
#Entity
#Table(name = "posts")
public class Post {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#NotNull
#Size(max = 100)
#Column(unique = true)
private String title;
#NotNull
#Size(max = 250)
private String description;
#NotNull
#Lob
private String content;
#NotNull
#Temporal(TemporalType.TIMESTAMP)
#Column(name = "posted_at")
private Date postedAt = new Date();
#NotNull
#Temporal(TemporalType.TIMESTAMP)
#Column(name = "last_updated_at")
private Date lastUpdatedAt = new Date();
#OneToMany(cascade = CascadeType.ALL,
fetch = FetchType.LAZY,
mappedBy = "post")
private Set<Comment> comments = new HashSet<>();
public Post() {
}
public Post(String title, String description, String content) {
this.title = title;
this.description = description;
this.content = content;
}
//getters and setters
}
Comment class
many to one mapping with composite primary keys using #Idclass
#Entity
#IdClass(CommentId.class)
#Table(name = "comments")
public class Comment {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#NotNull
#Lob
private String text;
#Id
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "post_id", nullable = false)
private Post post;
public Comment() {
}
public Comment(String text) {
this.text = text;
}
//getters and setters
}
Id class
CommentId
public class CommentId implements Serializable {
private static final long serialVersionUID = 1L;
private Post post;
private Long id;
public CommentId(Post post, Long id) {
super();
this.post = post;
this.id = id;
}
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result+ ((post == null) ? 0 : post.hashCode());
result = prime * result ;
return result;
}
public boolean equals(Object object) {
if (object instanceof CommentId) {
CommentId pk = (CommentId)object;
return id.equals(pk.id) && post == pk.post;
} else {
return false;
}
}
//getters and setters
}
repositories
PostRepository
CommentRepository
#Repository
public interface PostRepository extends JpaRepository<Post, Long> {
}
#Repository
public interface CommentRepository extends JpaRepository<Comment, Long>
{
}
Controller class get request and I am using mysql database
#RestController
#RequestMapping("/demo")
public class Controller {
#Autowired
PostRepository ps;
CommentRepository cs;
#GetMapping("/post")
public List<Post> getAll(){
return ps.findAll();
}
#GetMapping("/comment")
public List<Comment> getAllcom(){
return cs.findAll();
}
}