JPA Hibernate - Entity with #Loader and a function field in select, won't work properly - spring

Question

#Entity
#Table(name="cad_paciente")
#Loader(namedQuery = "selectInicial")
#NamedNativeQuery(
name="selectInicial",
query="select p.*, fu_obter_lista_convenios_pac(p.id) as ds_convenio from cad_paciente p where p.id = ?", resultClass = Paciente.class,
resultSetMapping = "sqlResult")
#SqlResultSetMapping(
name="sqlResult",
entities={
#EntityResult(entityClass = Paciente.class, fields={
#FieldResult(name="ds_convenio",column="ds_convenio")})})
public class Paciente {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#NotNull
#Column(name="id_empresa")
private Integer id_empresa;
...
#Transient
#Column(name="ds_convenio")
private String ds_convenio;
public String getDs_convenio() {
return ds_convenio;
}
public void setDs_convenio(String ds_convenio) {
this.ds_convenio = ds_convenio;
}
My Controller method "pacientes.findAll()" won't return "ds_convenio" field with the correct value, listing "null" always in my JSON return.
What do I have to do?

Answer 1

Try removing the annotation #Transient and provide the column as below :
#Column(name="ds_convenio")
private String ds_convenio;
#org.springframework.data.annotation.Transient specifically states to the spring framework that the Object Mapper you are using should not include this value when converting from Java Object to JSON. Also, it means that the value is not to be persisted into the database, which means you could not query over it.
Or if you want to keep it as transient itself but does not require the value to be serialized then register the object mapper as below :
#Bean
public ObjectMapper includeTransientObjectMapper() {
Hibernate5Module hibernate5Module = new Hibernate5Module();
hibernate5Module.disable(Hibernate5Module.Feature.USE_TRANSIENT_ANNOTATION);
ObjectMapper mapper = new ObjectMapper();
mapper.registerModule(hibernate5Module);
return mapper;
}
Or in your case since you want the result of the #NamedNativeQuer in which you aliased ds_convenio, using #FieldResult might be required to get the desired result as follows :
#Entity
#Table(name="cad_paciente")
#Loader(namedQuery = "selectInicial")
#NamedNativeQuery(name="selectInicial", query="select p.*, fu_obter_lista_convenios_pac(p.id) as ds_convenio from cad_paciente p where p.id = ?", resultClass = Paciente.class)
#SqlResultSetMapping(name="Results",
entities={
#EntityResult(entityClass=com.acme.Order.class, fields={
#FieldResult(name="id", column="id"),
#FieldResult(name="id_empresa", column="id_empresa"),
........
})
public class Paciente {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#NotNull
#Column(name="id_empresa")
private Integer id_empresa;
...
#Transient
#Column(name="ds_convenio")
private String ds_convenio;
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