如何将 Patch 方法与连接到 Couchbase 数据库的 Spring Boot Rest API 一起使用？

Question

我正在尝试设计一个 Spring 引导应用程序，将产品保存在数据库中并可以执行基本的 CRUD 操作。 Post、Get、Put、Delete 等方法都可以正常工作，但是当我尝试 Patch 方法时，我无法得到正确的结果。我尝试按照 Medium post here.

中提到的路径进行操作

但与此不同的是，我还想与Couchbase数据库进行通信。当我尝试修补数据库中的数据时，返回以下错误消息。在此先感谢大家。

{
  "timestamp": "2020-10-14T21:46:50.599+00:00",
  "status": 500,
  "error": "Internal Server Error",
  "message": "",
  "path": "/v1/products/f37e4e07-1301-43c1-afae-04eba1b9b437"
}

这是我的 Java 代码：

我的产品域名class:

@Getter
@Setter
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class Product {
    private String id;
    private String category;
    private double price;
    private String description;
    private int quantity;
}

产品库：

@Repository
public class ProductRepository {
    private final Cluster couchbaseCluster;
    private final Collection productCollection;

    public ProductRepository(Cluster couchbaseCluster, Collection productCollection) {
        this.couchbaseCluster = couchbaseCluster;
        this.productCollection = productCollection;
    }


    public void saveProduct(Product product){
        if (product == null){
            throw new IllegalArgumentException("Product can't be null");
        }
        if (!findProductById(product.getId()).equals(product)) {
            throw new RuntimeException(String.format("Product with id '%s' does not exists", product.getId()));
        }
        productCollection.remove(product.getId());
        productCollection.insert(product.getId(), product);
    }
}

产品服务：

@Service
public class ProductService {

    private final ProductRepository productRepository;

    public ProductService(ProductRepository productRepository) {
        this.productRepository = productRepository;
    }

    public void save(Product product) {
        try {
            productRepository.saveProduct(product);
        } catch (Exception e) {
            throw new IllegalArgumentException(); 
        }
    }
}

ProductUpdateDTO class:

@Getter
public class ProductUpdateDTO {
    private String category;
    private Double price;
    private String description;
    private Integer quantity;

    protected ProductUpdateDTO(){ }
}

最后，产品负责人：

@RestController
@RequestMapping("/v1/products")
public class ProductController {
    private final ProductService productService;
    private final RestService restService;

    public ProductController(ProductService productService, RestService restService) {
        this.productService = productService;
        this.restService = restService;
    }

    @PatchMapping ("/{id}")
    public ResponseEntity<Void> updateProduct(@PathVariable("id") String productId,
                                             @RequestBody ProductUpdateDTO productUpdateDTO) {
        Optional<Product> productOptional = productService.findProductById(productId);
        if (productOptional.isEmpty()) {
            return ResponseEntity.notFound().build();
        }

        Product product = productOptional.get();
        if (productUpdateDTO.getCategory() != null) {
            product.setCategory(productUpdateDTO.getCategory());
        }
        if (productUpdateDTO.getDescription() != null) {
            product.setDescription(productUpdateDTO.getDescription());
        }
        if (productUpdateDTO.getPrice() != null) {
            product.setPrice(productUpdateDTO.getPrice());
        }
        if (productUpdateDTO.getQuantity() != null) {
            product.setQuantity(productUpdateDTO.getQuantity());
        }

        productService.save(product);

        return ResponseEntity.noContent().build();
    }
}

Answer 1

可选 class 有误。当我在第 2 部分的代码块中进行以下更改时，问题就解决了。

@Repository
public class ProductRepository {
    private final Cluster couchbaseCluster;
    private final Collection productCollection;

    public ProductRepository(Cluster couchbaseCluster, Collection productCollection) {
        this.couchbaseCluster = couchbaseCluster;
        this.productCollection = productCollection;
    }


    public void saveProduct(Product product){
        if (product == null){
            throw new IllegalArgumentException("Product can't be null");
        }
      --->  ****if (findProductById(product.getId()).isEmpty())**** {
            throw new RuntimeException(String.format("Product with id '%s' does not exists", product.getId()));
        }
        productCollection.remove(product.getId());
        productCollection.insert(product.getId(), product);
    }
}

如何将 Patch 方法与连接到 Couchbase 数据库的 Spring Boot Rest API 一起使用？

How can I use Patch method with Spring Boot Rest APIs connected to Couchbase database?

java

spring

spring-boot

rest

api-design