I'm trying to update automaticly all entries of a new sql column with the #PostPersist anotation.
the model :
int id;
String firstName;
String SecondName;
String Maths;
#AutoWired
ModelService modelService;
#PostPersist
public void setMathsWithPostPersist(){
if(Maths == null) {
Maths = modelService.calculate(id);
}
}
Then, here's the service:
public int calculateById(int id){
Model model = modelRepository.getById(id);
int number = calculateNumber(model);
model.setMaths(number);
modelRepository.save(organisme);
return number;
}
I don't know if it's due to the fact that I'm using an autowired in the model class, that's my first use of #PostPersist.
What did I do wrong?
The #PostPersist listener is only invoked when "persisting" an entity, but what you are doing here is an update of an existing entity, so you would have to use #PostUpdate instead.
Related
I have to create an application with Jhipster but i never use it before.
When a user send a GET request to the address http://localhost:8080/api/newmesure/{mac-address}/{value}
I want to insert a new mesure in my database.
First i created 3 entity "Plantes", "Capteurs" and "Mesures" with this format :
Image here : https://i.stack.imgur.com/zJqia.png (I'm not allowed to post)
I activated the JPA Filtering to create a #Query to insert data in my database but i read that was not possible.
In /src/main/java/com/mycompany/myapp/web/rest/MesuresRessources.java :
/**
* REST controller for managing {#link com.mycompany.myapp.domain.Mesures}.
*/
#RestController
#RequestMapping("/api")
public class MesuresResource {
private final Logger log = LoggerFactory.getLogger(MesuresResource.class);
private static final String ENTITY_NAME = "mesures";
#Value("${jhipster.clientApp.name}")
private String applicationName;
private final MesuresService mesuresService;
private final MesuresQueryService mesuresQueryService;
public MesuresResource(MesuresService mesuresService, MesuresQueryService mesuresQueryService) {
this.mesuresService = mesuresService;
this.mesuresQueryService = mesuresQueryService;
}
#GetMapping("/newMesure/{mac}/{value}")
public String newMesure(#PathVariable String mac,#PathVariable int value) {
log.debug("Adresse MAC : "+mac);
log.debug("Valeur : "+value);
#Query("SELECT valeur FROM Mesures WHERE id = 1") //not working
Mesures getValeur(); //not working
return "Mesure ajoutée";
}
}
In /src/main/java/com/mycompany/myapp/domain/Mesures.java :
/**
* A Mesures.
*/
#Entity
#Table(name = "mesures")
public class Mesures implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#Column(name = "valeur")
private Integer valeur;
#ManyToOne(optional = false)
#NotNull
#JsonIgnoreProperties("macs")
private Capteurs mac;
// jhipster-needle-entity-add-field - JHipster will add fields here, do not remove
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public Integer getValeur() {
return valeur;
}
public Mesures valeur(Integer valeur) {
this.valeur = valeur;
return this;
}
public void setValeur(Integer valeur) {
this.valeur = valeur;
}
public Capteurs getMac() {
return mac;
}
public Mesures mac(Capteurs capteurs) {
this.mac = capteurs;
return this;
}
public void setMac(Capteurs capteurs) {
this.mac = capteurs;
}
// jhipster-needle-entity-add-getters-setters - JHipster will add getters and setters here, do not remove
#Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof Mesures)) {
return false;
}
return id != null && id.equals(((Mesures) o).id);
}
#Override
public int hashCode() {
return 31;
}
#Override
public String toString() {
return "Mesures{" +
"id=" + getId() +
", valeur=" + getValeur() +
"}";
}
}
Louan
Learning java with JHipster is probably not a wise idea, it uses a very rich technology stack which might lose you unless you invest enough time to learn the basics.
There are many things wrong in your code and approach:
You can't use #Query annotation inside the body of method a of your REST controller, it must be used in your #Repository interface, this code can't compile. See https://www.baeldung.com/spring-data-jpa-query for a quick introduction
JPA filtering is not related to inserting into database
In HTTP/REST, GET method is supposed to be idempotent. For making changes in your database you should use POST or PUT methods. See What is idempotency in HTTP methods?
Your entity naming convention is not consistent: use singular for entity classes because each entity object represents one single instance of Mesure. Here you have Plantes (plural), Capteur (singular) and Mesures (plural). For table names, JHipster uses singular but plural is quite common too because a table holds many rows. Of course, this is just a convention and you or your team may decide to apply another (like a prefix for table names) but the key point is to be consistent.
Hi I am new to using Spring with MongoRepository and I'm working on creating a custom query for MongoDB using Spring's MongoRepository.
What I would like to do is return a custom query for another variable in my model instead of the Object id.
for my model I have:
#Document(collection = "useraccount")
public class UserAccounts {
#Id
private String id;
private String accountNumber;
private String firstName;
private String lastName;
// getters and setters
}
inside of my repository I just extend the generic MongoRepository:
#Repository
public interface UserAccountsRepository extends MongoRepository<UserAccounts, String> {
}
I am trying to create a custom query that returns the accountNumber inside of my UserAccountsService:
#Service
public class UserAccountsService {
private final UserAccountsRepository userAccountsRepository;
public UserAccountsService(UserAccountsRepository userAccountsRepository) {
this.userAccountsRepository = userAccountsRepository;
}
// generic find by Object id
public UserAccounts findOne(String id) {
Optional<UserAccounts> userAccountsOptional =
userAccountsRepository.findById(id);
if(!userAccountsOptional.isPresent()) {
throw new RuntimeException("User Account Not Found");
}
return userAccountsOptional.get();
}
// would like to implement custom query to return UserAccount if
// found by accountNumber variable
public UserAccounts findOneByUserAccountNumber(String accountNumber) {
return dormantAccountsRepository.findOne(*need query here*);;
}
}
How would I go about creating a custom query to find a User Account by the accountNumber instead of the object id?
Any help would be great thanks!
I have a Class
#Document
public class MyDocument {
#Id
private String id;
private String title;
private String description;
private String tagLine;
#CreatedDate
private Date createdDate;
#LastModifiedDate
private Date updatedDate;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
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 getTagLine() {
return tagLine;
}
public void setTagLine(String tagLine) {
this.tagLine = tagLine;
}
}
i have added annotated application with #EnableMongoAuditing
i have created interface which implements mongorepository
public interface MyDocumentRepository extends MongoRepository<MyDocument, String> {
}
when i have created RestController with GET,POST,PATCH methods
in POST I'm sending
{'title':'first'}
Controller Class POST method is
#RequestMapping(value = "/", method = RequestMethod.POST)
public ResponseEntity<?> saveMyDocument(#RequestBody MyDocument myDocument) {
MyDocument doc = myDocumentRepo.save(myDocument);
return new ResponseEntity<MyDocument>(doc, HttpStatus.CREATED);
}
Its saving the data in mongo.
{
"_id" : ObjectId("56b3451f0364b03f3098f101"),
"_class" : "com.wiziq.service.course.model.MyDocument",
"title" : "test"
}
and PATCH request is like
#RequestMapping(value = "/{id}", method = RequestMethod.PATCH)
public ResponseEntity<MyDocument> updateCourse(#PathVariable(value = "id") String id,
#RequestBody MyDocument myDocument) {
myDocument.setId(id);
MyDocument doc = courseService.save(myDocument);
return ResponseEntity.ok(course);
}
when in make PATCH request with data {"description":"This is test"}
it update the docuent BUT it removes title field and createdDate form the document, its doing update which is ok. But i wanted to do an upsert, i can do its using mongoTemplate,
but there i have to set each property which i want to set.
Is there any generic way to that if i get a PATCH request i can update only not null properties.. properties which are coming in request
spring-data-rest seems to do it using #RepositoryRestResource. How can i achieve the same.
I don't want to code like this
Update update = new Update().set("title", myDocument.getTitle()).set("description", myDocument.getdescription());
Unfortunately its the behavior in MongoDB, you can verify the same using shell.
So to update create an Update Object and using
Query query = new Query(Criteria.where("id").is(ID));
Here ID is the document which you want to update.Based on your requirement set upsert after that using findAndModify update document.
mongoTemplate.findAndModify(query, update,
new FindAndModifyOptions().returnNew(true).upsert(false),
someclass.class);
If you have a model like MyModel.class and you need a smooth way to create an Update object from it there is no real clear way how to do this but you can use MongoConverter bean that is created in Spring Data Mongo auto configuration and then just use replaceOne method of MongoCollection.
#Autowired
private MongoTemplate template;
#Autowired
private MongoConverter mongoConverter;
...
#Override
public void upsertMyModel(MyModel model) {
Document documentToUpsert = new Document();
mongoConverter.write(model, documentToUpsert);
template.getCollection(collectionName).replaceOne(
Filters.eq("_id", model.getId()),
documentToUpsert,
new ReplaceOptions().upsert(true));
}
Upsert can be done in Spring data mongodb using BulkOperations.
Suppose there are two entities Entity1 and Entity2. Entity1 has foreginId which is primary id of Entity2. Both have a field title. Now, to upsert from entity2 to entity1, we can do it as follows:
Query query = new Query(Criteria.where("foreignId").is(entity2.getId()));
Update update = new Update();
update.set("title",entity2.getTitle());
List<Pair<Query, Update>> updates = new ArrayList<Pair<Query, Update>>();
updates.add(Pair.of(query, update););
BulkOperations bulkOps = this.mongoTemplate.bulkOps(BulkMode.UNORDERED, Entity1.class);
bulkOps.upsert(updates);
bulkOps.execute();
I have a some questions about Spring rowmapper. I'm going to receive data from my DB using rowmapper.But my command object 'Table' only have List variable.
is Rowmapper automatically map each record to List ? is it posibble?
i know spring bind tag is automatically bind value to list.
right this.
Table.java
public class Table implements Serializable{
private List<String> tableNum = new ArrayList<String>();
// setter and getter
}
Dao
private class TableRowMapper implements RowMapper {
public Object mapRow(ResultSet rs, int rowNum) throws SQLException {
Table table = new Table();
table.setTableNum(rs.getString("TABLE_LOCATION"));
return table;
}
}
The RowMapper is used to map a single row to a single domain object, not a bunch of rows results to a single domain object. Also the RowMapper isn't a Dao type object. It is to be used with some query method, like JdbcTemplate.query(sql,args,rowMapper)
But in your case, you don't want a RowMapper. You should instead just use a JdbcTemplate.queryForList. See the JdbcTemplate API for more query method. A simple example would be something like:
public class YourDaoImpl extends JdbcTemplate implements YourDao {
private static final String SQL =
"select SOME_FIELD from SOME_TABLE where SOMETHING = ?";
#Override
public List<String> getSomeFieldBySomething(String something) {
return (List<String>)queryForList( SQL,
new Object[] { something },
String.class);
}
}
You use the dao for your services.
UPDATE
Because of your help, I can get a one column from my DB. but I got a problems. my db table is made of multiple columns. and i must receive all of them. and.. how can i do it? plz help me~!!!
You posted question in no points that out. In this case you need to make a List<DomainObject>. Not a List<String>. List<String> only allows for one value. If you have a List<DomainObject>, then the class DomainObject can have all your fields. Then that's when you use the RowMapper. And you can still use queryForList that uses the RowMapper variant
public class Table {
private String field1;
private String field2;
private String field3;
// getters and setters
}
public class YourDaoImpl extends JdbcTemplate implements YourDao {
private static final String SQL =
"select * from SOME_TABLE where SOMETHING = ?";
#Override
public List<Table> getTableBySomething(String something) {
return (List<Table>)queryForList( SQL,
new Object[] { something },
new RowMapper<Table>(){
#Override
public Table mapRow(ResultSet rs, int rowNumber) {
Table table = new Table();
table.setField1(rs.getString("feild1"));
// set the others
return table;
}
});
}
}
An aside, if I were you, I would forget the jdbc and go for an ORM framework like JPA. If you want entire domain objects, this is the way to go.
I'm using spring mvc and I created the CRUD functionality. But I want to create a search function that will allow me to find a user by any parameter (variable) as 'userid' or 'username' or 'lastname' or 'social security number' or whatever.
My userid is an integer type.
How can I do that? What is the SQL query for that?
How can I check if the input is integer or string and then go through the database by the given parameter and search for the user?
If you are using Hibernate for data access you can easily create universal finder using criteria API:
Abstract DAO class:
public abstract class AbstractHibernateDAO<T> {
private static final String PARAM_VALUE_PARAMETER = "paramValue";
private final Class<T> clazz;
#Autowired
private SessionFactory sessionFactory;
public AbstractHibernateDAO(Class<T> clazz) {
this.clazz = clazz;
}
public T findOne(String paramName, Object paramValue) {
Session session = sessionFactory.getCurrentSession();
#SuppressWarnings("unchecked")
T fetchedObject = (T) session.createCriteria(clazz).add(Restrictions.eq(paramName, paramValue)).uniqueResult();
return fetchedObject;
}
// Other CRUD methods.
}
Concrete DAO class for entity:
#Repository
#Transactional
public class ProductHibernateDAO extends AbstractHibernateDAO<Product> {
public ProductHibernateDAO() {
super(Product.class);
}
}
Or if you prefer to use HQL instead of Criteria API you can rewrite search method as:
public T findOne(String paramName, Object paramValue) {
Session session = sessionFactory.getCurrentSession();
StringBuilder queryText = new StringBuilder();
queryText.append("from ");
queryText.append(clazz.getSimpleName());
queryText.append(" where ");
queryText.append(paramName);
queryText.append("=:");
queryText.append(PARAM_VALUE_PARAMETER);
#SuppressWarnings("unchecked")
T fetchedObject = (T) session.createQuery(queryText.toString()).setParameter(PARAM_VALUE_PARAMETER, paramValue).uniqueResult();
return fetchedObject;
}
In this article you can find very good description how to create generic DAO with hibernate (Or if you prefer JPA there are also described how to do this with JPA).
Or if you prefer to use JDBC for data access I recommend you to look at Spring's JdbcTemplate. It simplifies development a lot. Here how you can implement universal finder using JdbcTemplate:
#Repository
#Transactional
public class ProductJDBCDAO implements DAO<Product> {
private static final String TABLE_NAME = "product";
#Autowired
private JdbcTemplate jdbcTemplate;
public Product findOne(String paramName, Object paramValue) {
RowMapper<Product> rowMapper = new RowMapper<Product>(){
public Product mapRow(ResultSet rs, int rowNum) throws SQLException {
long productId = rs.getLong("product_id");
// Other properties
Product product = new Product(...);
return product;
}
};
StringBuilder queryText = new StringBuilder();
queryText.append("select * from ");
queryText.append(TABLE_NAME);
queryText.append(" where ");
queryText.append(paramName);
queryText.append("=?");
Product fetchedObject = jdbcTemplate.queryForObject(queryText.toString(), rowMapper, paramValue);
return fetchedObject;
}
// Other CRUD methods
}
Ass you can see in all examples you don't need explicitly specify parameter type, you just add it as Object parameter.
If you will work with direct JDBC in such case I recommend you to use PreparedStatement and it's setObject(..) method. Query text will be similar to shown in the example with JdbcTemplate.