I'm developing an API in Spring Boot and I have two models, a "productModel" and a "categoryModel" that reference each other by ManyToOne and OneToMany.
In product I get a "category" that references the Category model by @ManyToOne, and in category I have a list of products by @OneToMany.
The problem is that when creating my postman request for a product, even sending a category id correctly my category is saved in the database as "null"
productModel
package com.api.business_products_management.models;
import jakarta.persistence.*;
import java.util.UUID;
@Entity
@Table(name = "PRODUCTS")
public class ProductModel {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private UUID id;
@Column(nullable = false, length = 80)
private String product;
@Column(nullable = true, length = 80)
private String description;
@Column(nullable = false, length = 80)
private Float price;
@Column(nullable = false, length = 80)
private Integer stock;
@ManyToOne
@JoinColumn(name = "category_id")
private CategoryModel category;
public UUID getId() {
return id;
}
public void setId(UUID id) {
this.id = id;
}
public String getProduct() {
return product;
}
public void setProduct(String product) {
this.product = product;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public Float getPrice() {
return price;
}
public void setPrice(Float price) {
this.price = price;
}
public Integer getStock() {
return stock;
}
public void setStock(Integer stock) {
this.stock = stock;
}
public CategoryModel getCategory() {
return category;
}
public void setCategory(CategoryModel category) {
this.category = category;
}
}
productDto
package com.api.business_products_management.dtos;
import jakarta.validation.constraints.DecimalMin;
import jakarta.validation.constraints.Min;
import jakarta.validation.constraints.NotBlank;
import jakarta.validation.constraints.NotNull;
import java.util.UUID;
public class ProductDto {
@NotBlank
private String product;
private String description;
@DecimalMin(value = "0.01", inclusive = true)
private Float price;
@NotNull
@Min(value = 0, message = "Stock must be at least {value}")
private Integer stock;
@NotNull
private CategoryDto category;
public String getProduct() {
return product;
}
public void setProduct(String product) {
this.product = product;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public Float getPrice() {
return price;
}
public void setPrice(Float price) {
this.price = price;
}
public Integer getStock() {
return stock;
}
public void setStock(Integer stock) {
this.stock = stock;
}
public CategoryDto getCategory() {
return category;
}
public void setCategory(CategoryDto category) {
this.category = category;
}
}
productController
package com.api.business_products_management.controllers;
import com.api.business_products_management.dtos.ProductDto;
import com.api.business_products_management.models.ProductModel;
import com.api.business_products_management.services.ProductService;
import jakarta.validation.Valid;
import org.springframework.beans.BeanUtils;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
@RestController
@CrossOrigin(origins = "*", maxAge = 3600)
@RequestMapping("/product")
public class ProductController {
final ProductService productService;
public ProductController (ProductService productService) {
this.productService = productService;
}
@PostMapping
public ResponseEntity<Object> saveProduct (@RequestBody @Valid ProductDto productDto) {
var productModel = new ProductModel();
BeanUtils.copyProperties(productDto, productModel);
return ResponseEntity.status(HttpStatus.CREATED).body(productService.save(productModel));
}
}
categoryModel
package com.api.business_products_management.models;
import jakarta.persistence.*;
import java.util.List;
import java.util.UUID;
@Entity
@Table(name = "CATEGORIES")
public class CategoryModel {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private UUID id;
@Column(nullable = false, length = 80)
private String name;
@Column(nullable = true, length = 80)
private String description;
@OneToMany(mappedBy = "category")
private List<ProductModel> products;
public UUID getId() {
return id;
}
public void setId(UUID id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public List<ProductModel> getProducts() {
return products;
}
public void setProducts(List<ProductModel> products) {
this.products = products;
}
}
categoryDto
package com.api.business_products_management.dtos;
import com.api.business_products_management.models.ProductModel;
import jakarta.validation.constraints.NotBlank;
import java.util.List;
import java.util.UUID;
public class CategoryDto {
private UUID id;
@NotBlank
private String name;
@NotBlank
private String description;
private List<UUID> productIds;
public UUID getId() {
return id;
}
public void setId(UUID id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public List<UUID> getProductIds() {
return productIds;
}
public void setProductIds(List<UUID> productIds) {
this.productIds = productIds;
}
}
update: I tried to implement the mapStruct as the user replied, but now it returns the error
***************************
APPLICATION FAILED TO START
***************************
Description:
Parameter 1 of constructor in com.api.business_products_management.controllers.CategoryController required a bean of type 'com.api.business_products_management.mappers.CategoryMapper' that could not be found.
Action:
Consider defining a bean of type 'com.api.business_products_management.mappers.CategoryMapper' in your configuration.
Process finished with exit code 1
