Get from VIEW in Spring boot - spring-boot

Question

I am beginner with Spring Boot and trying to improve my skills to get new job, so I hope you help me even if the question maybe easy for you as I search a lot and gain nothing.
I need to get by id, but return data is duplicated with only one record, I will show you what I do and the result for more explanation.
In DB side:
I have VW_Prices view in DB and it's data as shown below:
In Spring Boot side:
VW_Prices class is :
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import org.hibernate.annotations.Immutable;
#Entity
#Table(name = "VW_PRICES")
public class VW_Prices implements Serializable {
private long dealId;
private Long quotationId;
private Long productPriceForEjada;
private Long productPriceForClient;
private Long productId;
private Long productQuantity;
private String productName;
#Id
#Column(name = "ID")
public long getDealId() {
return dealId;
}
public void setDealId(long dealId) {
this.dealId = dealId;
}
#Column(name = "PRODUCT_QUANTITY")
public Long getProductQuantity() {
return productQuantity;
}
public void setProductQuantity(Long productQuantity) {
this.productQuantity = productQuantity;
}
#Column(name = "PRODUCT_NAME")
public String getProductName() {
return productName;
}
public void setProductName(String productName) {
this.productName = productName;
}
#Column(name = "PRODUCT_PRICE_FOR_EJADA")
public Long getProductPriceForEjada() {
return productPriceForEjada;
}
public void setProductPriceForEjada(Long productPriceForEjada) {
this.productPriceForEjada = productPriceForEjada;
}
#Column(name = "PRODUCT_PRICE_FOR_CLIENT")
public Long getProductPriceForClient() {
return productPriceForClient;
}
public void setProductPriceForClient(Long productPriceForClient) {
this.productPriceForClient = productPriceForClient;
}
#Column(name = "PRODUCT_ID")
public Long getProductId() {
return productId;
}
public void setProductId(Long productId) {
this.productId = productId;
}
#Column(name = "QUOTATION_ID")
public Long getQuotationId() {
return quotationId;
}
public void setQuotationId(Long quotationId) {
this.quotationId = quotationId;
}
}
and I create VW_PricesRepository
import java.util.List;
import java.util.Optional;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;
import springboot.deals_tracker_system.models.VW_Prices;
import springboot.deals_tracker_system.models.VW_Prices_interface;
public interface VW_PricesRepository extends JpaRepository<VW_Prices, Long> {
#Query( nativeQuery = true,value = "SELECT distinct * from VW_Prices v where v.id = :dealID " )
List<VW_Prices> findByDealId( #Param("dealID") Long id);
}
and my in my Service
public List<VW_Prices> findByDealId(Long dealId) {
System.out.println("we are in service");
List<VW_Prices> variableForDebug = VW_pricesRepository.findByDealId(dealId);
for (VW_Prices vw_Prices : variableForDebug) {
System.out.println(vw_Prices.getDealId() + " " + vw_Prices.getProductName());
}
return variableForDebug;
//return VW_pricesRepository.findByDealId(dealId);
}
When I pass dealId = 39 the result comes duplicated and not correct as in below:
how can I get correct data??
The view is made for Quotation Product Table to get product name.

Answer 1

i think the problem is the id annotation you must add GeneratedValue
fro the class:
#Entity
#Table(name = "VW_PRICES")
public class VW_Prices implements Serializable {
#Id
#GeneratedValue (strategy = GenerationType.IDENTITY)
private long dealId;
private Long quotationId;
private Long productPriceForEjada;
private Long productPriceForClient;
private Long productId;
private Long productQuantity;
private String productName;
//code..
}
You dont have to use JPQL for this type of queries it's already exist in jpa:
VW_PricesRepository:
public interface VW_PricesRepository extends JpaRepository<VW_Prices, Long> {
}
to get data by id use findById like that:
public VW_Prices findByDealId(Long dealId) {
System.out.println("we are in service");
VW_Prices vw_Prices = VW_pricesRepository.findById(dealId);
System.out.println(vw_Prices.getDealId() + " " +
vw_Prices.getProductName());
}
return vw_Prices;
}
All data should be deleted from VW_Prices table because ids are not unique, try to insert new data with unique id then try the above code

Answer 2

I detect the problem, The view has main table Quotation and I didn't select it's ID and I used ID of the secondary table as the main ID for the View
I just write it if any one Google for such problem