A CLOB database column data has linebreaks :
When I retrieve it and display the data inside a html table cell then the linebreaks are ignored :
#Override
#Transactional
public String getPrevisionRessourceAutreForProduit(Objectif produit) {
String hql = "select to_char(r.ress_comment_1) " +
"from ressource r join type_ressource t on r.type_ress_code = t.type_ress_code " +
"left join objectif o on r.obj_code = o.obj_code " +
"where o.obj_code = " + produit.getCode().toString() + " and upper(t.type_ress_code) = 'AUT'";
Session sessionDynamic = Utils.createDynamicSession(env);
Query query = sessionDynamic.createSQLQuery(hql);
#SuppressWarnings("unchecked")
List<String> list = (List<String>) query.list();
sessionDynamic.close();
if (list.isEmpty())
return "";
else
return list.get(0) == null ? "" : list.get(0);
}
So how to fix it ?
I found the solution by enclosing the data inside the tags <pre>...</pre>
Related
I am using Spring Data JPA with native queries like below
public interface ItemRepository extends JpaRepository<ItemEntity, Long> {
#Query(value = "select * from items i where i.category = :itemCategory and i.item_code = :itemCode", nativeQuery = true)
Page<ItemEntity> search(#Param("itemCategory") String itemCategory, #Param("itemCode") String itemCode, Pageable pageable);
}
Now, my use case is
It itemCode is available, only the item with that code from that category should be returned.
But if itemCode is not available then all items in that category should be returned.
So the problem with the above category is when itemCode is passed as NULL no data is returned since it does not match anything. whereas the requirement is it should be ignored.
So is there a way to optionally add a clause to Spring Data JPA native query. I know it is possible with CriteriaQuery but can we do something similar for native queries?
Thanks
Yes, it's feasible with native query too. Very Good explanation here read this
#Approach1
#NamedQuery(name = "getUser", query = "select u from User u"
+ " where (:id is null or u.id = :id)"
+ " And :username"
:itemCode is null or i.item_code = :itemCode
#Approach2
# UserDao.java
public User getUser(Long id, String usename) {
String getUser = "select u from user u where u.id " + Dao.isNull(id)
+ " And u.username " + Dao.isNull(username);
Query query = Dao.entityManager.createQuery(getUser);
}
# Dao.java
public static String isNull(Object field) {
if (field != null) {
if (field instanceof String) {
return " = " + "'" + field + "'";
} else {
return " = " + field;
}
} else {
return " is NULL ";
}
}
How to handle null value of number type in JPA named query
Just modify the where condition
i.item_code = :itemCode
to
:itemCode is null or i.item_code = :itemCode
I use Query by Example and want to know how I can find objects with certain properties in the nested objects.
A plan anyone?
Here is my example Code:
ExampleMatcher matcher = ExampleMatcher.matching()
.withMatcher("offer2product.id.productId", match -> match.exact()
);
Offer2ProductId id = new Offer2ProductId();
id.setProductId(1337L);
Offer2Product offer2Product = new Offer2Product();
offer2Product.setId(id);
Set<Offer2Product> offer2productSet = new HashSet<>();
offer2productSet.add(offer2Product);
Offer probe = new Offer();
probe.setOffer2productSet(offer2productSet);
Example<Offer> example = Example.of(probe, matcher);
List<Offer> offerList = offerRepository.findAll(example);
Quoting Spring data documentation: https://docs.spring.io/spring-data/jpa/docs/current/reference/html/#query-by-example
Currently, only SingularAttribute properties can be used for property matching.
In your example, you want to search by a property that is a Set<> (offer2productSet), which is a PluralAttribute - it is not possible to search by this field. It will be ignored when building a query, as can be seen here:
https://github.com/spring-projects/spring-data-jpa/blob/master/src/main/java/org/springframework/data/jpa/convert/QueryByExamplePredicateBuilder.java#L112
man actually can do it, follow the example below, where demand has a list of labels, I don't have time to explain everything but soon I'll update this post.
#Repository
#RequiredArgsConstructor
public class DemandaFilterRepository {
private final EntityManager entityManager;
public Page<Demanda> findAll(DemandaFilterDTO demandaFilter, Pageable pageable) {
String query = "select d from Demanda d where 1=1";
Map<String, Object> parameters = new HashMap<>();
if (demandaFilter.getId() != null) {
query += " and d.id = :id";
parameters.put("id", demandaFilter.getId());
}
if (!StringUtils.isEmpty(demandaFilter.getTenant())) {
query += " and upper(d.tenant) = upper(:tenant)";
parameters.put("tenant", demandaFilter.getTenant());
}
if (!StringUtils.isEmpty(demandaFilter.getAssunto())) {
query += " and upper(d.assunto) like upper(:assunto)";
parameters.put("assunto", "%" + demandaFilter.getAssunto() + "%");
}
if (!StringUtils.isEmpty(demandaFilter.getDescricao())) {
query += " and upper(d.descricao) like upper(:descricao)";
parameters.put("descricao", "%" + demandaFilter.getDescricao() + "%");
}
if (!StringUtils.isEmpty(demandaFilter.getEtiqueta())) {
query = query.replace("Demanda d", "Demanda d inner join d.etiquetas etiqueta");
query += " and upper(etiqueta.descricao) = upper(:etiqueta)";
parameters.put("etiqueta", demandaFilter.getEtiqueta());
}
if (!StringUtils.isEmpty(demandaFilter.getNomeDemandante())) {
query += " and upper(d.demandante.nome) like upper(:nomeDemandante)";
parameters.put("nomeDemandante", "%" + demandaFilter.getNomeDemandante() + "%" );
}
if (!StringUtils.isEmpty(demandaFilter.getDtInclusao())) {
query += " d.dtInclusao like :dtInclusao";
parameters.put("dtInclusao", "%" + demandaFilter.getDtInclusao() + "%");
}
query += " ORDER BY d.id DESC ";
TypedQuery<Demanda> typedQuery = entityManager.createQuery(query, Demanda.class)
.setMaxResults(pageable.getPageSize())
.setFirstResult(pageable.getPageNumber() * pageable.getPageSize());
parameters.forEach(typedQuery::setParameter);
return new PageImpl<>(typedQuery.getResultList());
}
}
this is a class for one of a small project that I'm working on ...
I'm scanning my code with SonarQube and I'm getting the following bugs:
-A prepared statement is generated from a nonconstant String
-Nonconstant string passed to execute method on an SQL statement
I have an sql query to which I append based on some conditions.
Example:
PreparedStatement ps = null;
StringBuilder sql = new StringBuilder("UPDATE" + tableName + " SET some_field = ? WHERE a_field = a_value");
if (myObject.getField1() != null) {
sql.append(" AND Field1 = " + myObject.getField1());
}
if (myObject.getField2() != null) {
sql.append(" AND Field2 = " + myObject.getField2());
}
if (myObject.getField3() != null) {
sql.append(" AND Field3 = " + myObject.getField3());
}
if (myObject.getField4() != null) {
sql.append(" AND Field4 = " + myObject.getField4());
}
...
**ps = connection.prepareStatement(sql.toString());** //generating bug
if (myObject.getSomeField() == null) {
ps.setNull(1, nevermind);
} else {
ps.setString(1, myObject.getSomeField());
}
I tried passing a final String = sql.toString(); to the prepareStatement() function and it still generates the bug.
The issue that's being raised is that you're assembling your SQL command with concatenation: which table to update, which columns to set and what values to put in them.
You should find a way to hard code the table and columns and use parameter binding for the values.
I have a Customer Table and a Address Table (customer_id, address_forename, address_surname, address_street, address_city, address_zip,
address_storedtime) where customer_id as a foreign key.
One customer can have several address.
Now I am trying to get only the last entered address using LINQ as bellow which should allow me put the address in a string and return that:
CODE:
var customerAddress = (from c in myDB.address
where (c.customer_id == customerId)
select new
{
c.customer_id,
c.address_forename,
c.address_surname,
c.address_street,
c.address_city,
c.address_zip,
c.address_storedtime
}).GroupBy(g => new
{
Customer = .customer_id,
Address = g.address_forename + " " + g.address_surname + " " + g.address_street + " " + g.address_city + " " + g.address_zip
}).Select(g => new
{
g.Key.Customer,
g.Key.Address,
StoredTime = g.Max(x => x.address_storedtime)
}).Disinct();/*First();*/
string result = "";
foreach (var ad in customerAddress)
{
if (ad.Address != null)
{
result = ad.Address;
}
break;
}
return result;
I am getting same address string for different addresses in DB for the Customer whereas I am trying to get only one.
Since you're already filtering by customer id, the grouping clause isn't necessary. You should be able to just order the results for the customer descending and project the address much more simply.
var customerAddress = (from c in myDB.address
where (c.customer_id == customerId)
orderby c.address_storedtime descending
select c.address_forename + " " + c.address_surname + " " + c.address_street + " " + c.address_city + " " + c.address_zip)
.FirstOrDefault();
Replace your foreach by
var result =
customerAdress.Any(ad => ad.Address != null)
? customerAdress.Last(ad => ad.Address != null).Address
: default(string);
I have an INT fields called TradeNo that may contain NULL value. The requirement is to display on the dropdown the "contract Id" and the "trade no" in bracket and if "trade no" is null, then display N/A.
Example:
44444 (2222)
55555 ( N/A )
Here’s what I thought would work. This is my functions that returns a SelectList
public IEnumerable<SelectListItem> GetContractsBySupplierDropDown(string supplier)
{
var result = from c in context.Contracts
where c.Supplier==supplier
orderby c.ContractID
select new {
Text = c.ContractID.ToString() + " (" +
(c.TradeNo.HasValue ?
c.TradeNo.Value.ToString() :
" N/A ").ToString() +
" )",
Value = c.ContractID };
return new SelectList(result, "Text", "Value");
}
The error being return is:
LINQ to Entities does not recognize the method 'System.String ToString()'
method, and this method cannot be translated into a store expression.
From what I can tell, the error displayed means that EF is trying to convert ToString to a database function?
Unfortunately you cannot use ToString in a number field coming from the database.
As a work around you can cast ToList before doing it, so then the contents are in the memory.
public IEnumerable<SelectListItem> GetContractsBySupplierDropDown(string supplier)
{
var query = from c in context.Contracts
where c.Supplier==supplier
orderby c.ContractID
select new {
c.ContractID,
c.TradeNo,
};
var result = from c in query.ToList()
select new {
Text = c.ContractID.ToString() + " (" +
(c.TradeNo.HasValue ?
c.TradeNo.Value.ToString() :
" N/A ") +
" )",
Value = c.ContractID
};
return new SelectList(result, "Text", "Value");
}