BAEL-7692 added case for ResultDTO_wo_Ids.java

persistence-modules/spring-data-jpa-repo-3/src/main/java/com/baeldung/spring/data/jpa/joinquery/DTO/ResultDTO_wo_Ids.java

@@ -0,0 +1,66 @@
+package com.baeldung.spring.data.jpa.joinquery.DTO;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.IdClass;
+
+import java.time.LocalDate;
+
+//@Entity
+//@IdClass(DTO.class)
+public class ResultDTO_wo_Ids {
+    public ResultDTO_wo_Ids(String customerName, String customerEmail, LocalDate orderDate, String productName, Double productPrice) {
+        this.customerName = customerName;
+        this.customerEmail = customerEmail;
+        this.orderDate = orderDate;
+        this.productName = productName;
+        this.productPrice = productPrice;
+    }
+
+    private String customerName;
+    private String customerEmail;
+    private LocalDate orderDate;
+    private String productName;
+    private Double productPrice;
+
+    public String getCustomerName() {
+        return customerName;
+    }
+
+    public void setCustomerName(String customerName) {
+        this.customerName = customerName;
+    }
+
+    public String getCustomerEmail() {
+        return customerEmail;
+    }
+
+    public void setCustomerEmail(String customerEmail) {
+        this.customerEmail = customerEmail;
+    }
+
+    public LocalDate getOrderDate() {
+        return orderDate;
+    }
+
+    public void setOrderDate(LocalDate orderDate) {
+        this.orderDate = orderDate;
+    }
+
+    public String getProductName() {
+        return productName;
+    }
+
+    public void setProductName(String productName) {
+        this.productName = productName;
+    }
+
+    public Double getProductPrice() {
+        return productPrice;
+    }
+
+    public void setProductPrice(Double productPrice) {
+        this.productPrice = productPrice;
+    }
+
+}

persistence-modules/spring-data-jpa-repo-3/src/main/java/com/baeldung/spring/data/jpa/joinquery/repositories/JoinRepository.java

@@ -1,6 +1,7 @@
 package com.baeldung.spring.data.jpa.joinquery.repositories;
 
 import com.baeldung.spring.data.jpa.joinquery.DTO.ResultDTO;
+import com.baeldung.spring.data.jpa.joinquery.DTO.ResultDTO_wo_Ids;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.data.repository.CrudRepository;
 import org.springframework.stereotype.Repository;
@@ -16,6 +17,13 @@ public interface JoinRepository extends CrudRepository<ResultDTO, Long> {
       + " and c.id=?1 ")
     List<ResultDTO> findResultDTOByCustomer(Long id);
 
+    @Query(value = "SELECT new com.baeldung.spring.data.jpa.joinquery.DTO.ResultDTO_wo_Ids(c.name, c.email, o.orderDate, p.productName, p.price) "
+      + " from Customer c, CustomerOrder o ,Product p "
+      + " where c.id=o.customer.id "
+      + " and o.id=p.customerOrder.id "
+      + " and c.id=?1 ")
+    List<ResultDTO_wo_Ids> findResultDTOByCustomerWithoutIds(Long id);
+
     @Query(value = "SELECT c.*, o.*, p.* "
       + " from Customer c, CustomerOrder o ,Product p "
       + " where c.id=o.customer_id "

persistence-modules/spring-data-jpa-repo-3/src/test/java/com/baeldung/spring/data/jpa/joinquery/JoinRepositoryTest.java

@@ -1,5 +1,6 @@
 package com.baeldung.spring.data.jpa.joinquery;
 
+import com.baeldung.spring.data.jpa.joinquery.DTO.ResultDTO_wo_Ids;
 import com.baeldung.spring.data.jpa.joinquery.entities.Customer;
 import com.baeldung.spring.data.jpa.joinquery.entities.CustomerOrder;
 import com.baeldung.spring.data.jpa.joinquery.DTO.ResultDTO;
@@ -90,6 +91,13 @@ class JoinRepositoryTest {
             assertEquals(9, map.keySet().size());
         });
     }
+
+    @Test
+    void whenFindResultDTOByCustomerWithoutIds_thenReturnResultDTO() {
+        List<ResultDTO_wo_Ids> resultDTO = joinRepository.findResultDTOByCustomerWithoutIds(1L);
+        assertInstanceOf(ResultDTO_wo_Ids.class, resultDTO.get(0));
+    }
+
     private EntityTransaction getTransaction() {
         EntityTransaction transaction = entityManager.getTransaction();
         transaction.begin();