Java ModelMapper：将DTO映射到EmbeddedId实体类

huangapple
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英文:

Java ModelMapper: map DTO to EmbeddedId entity class

问题

这里是您提供的代码部分翻译：

PlanDTO：

  1. public class PlanDTO implements Serializable {
  2.     private static final long serialVersionUID = 1L;
  3.     private Long id;
  4.     private String name;
  5.     private String formula;
  6.     private String frequency;
  7.     private String pricingtable;
  8.     // 省略了 getters 和 setters
  9. }

PlanId：

  1. @Embeddable
  2. public class PlanId implements Serializable {
  3.     private static final long serialVersionUID = 1L;
  4.     private Long id;
  5.     private String name;
  6.     public PlanId() { }
  7.     public PlanId(Long id, String name) {
  8.         this.id = id;
  9.         this.name = name;
  10.     }
  11.     // 省略了 getters 和 setters
  12. }

Plan：

  1. @Entity
  2. @Table(name = "plan")
  3. public class Plan implements Serializable {
  4.     private static final long serialVersionUID = 1L;
  5.     @EmbeddedId
  6.     private PlanId id;
  7.     @Column(name = "formula")
  8.     private String formula;
  9.     @Column(name = "frequency")
  10.     private String frequency;
  11.     @Column(name = "pricingtable")
  12.     private String pricingTable;
  14.     public Plan() { }
  15.     // 省略了 setters 和 getters
  16. }

以下是 ModelMapper 的配置：

  1. @Bean
  2. public ModelMapper modelMapper() {
  3.     ModelMapper modelMapper = new ModelMapper();
  4.     modelMapper.getConfiguration().setAmbiguityIgnored(true);
  6.     PropertyMap<PlanDTO, Plan> itemMap1 = new PropertyMap<PlanDTO, Plan>() {
  7.         protected void configure() {
  8.             map().setFormula(source.getFormula());
  9.             map().setFrequency(source.getFrequency());
  10.             map().setId(new Plan(source.getId(), source.getName()));
  11.             map().setPricingTable(source.getPricingtable());
  12.         }
  13.     };
  14.     modelMapper.addMappings(itemMap1);
  15. }

但在运行时发生了如图所示的问题：调试图像

配置有问题吗？是不是漏掉了什么？

英文:

I want to know if it's possible to map a DTO to an entity class with a composite pk. I've been reading ModelMapper documentation about PropertyMap but I can't make it work.

Here is the code:

PlanDTO:

  1. public class PlanDTO implements Serializable {
  2.     private static final long serialVersionUID = 1L;
  3. 	private Long id;
  4. 	private String name;
  5. 	private String formula;
  6. 	private String frequency;
  7. 	private String pricingtable;
  8.     // getters and setters omitted

PlanId:

  1. @Embeddable
  2. public class PlanId implements Serializable {
  3. 	private static final long serialVersionUID = 1L;
  4. 	private Long id;
  5. 	private String name;
  6. 	public BillingPlanId() { }
  7. 	public PlanId(Long id, String name) {
  8. 		this.id = id;
  9.     	this.name = name;
  10.     }
  11.     // getters and setters omitted
  12. }

Plan:

  1. @Entity
  2. @Table(name = &quot;plan&quot;)
  3. public class Plan implements Serializable {
  4.     private static final long serialVersionUID = 1L;
  5. 	@EmbeddedId
  6. 	private PlanId id;
  7. 	@Column(name = &quot;formula&quot;)
  8.     private String formula;
  9.  	@Column(name = &quot;frequency&quot;)
  10.     private String frequency;
  11. 	@Column(name = &quot;pricingtable&quot;)
  12.     private String pricingTable;
  14. 	public Plan() { }
  16.     //setters and getters omitted
  17. }

Here is the ModelMapper configuration.

  1. @Bean
  2. public ModelMapper modelMapper() {
  3. 	ModelMapper modelMapper = new ModelMapper();
  4. 	modelMapper.getConfiguration().setAmbiguityIgnored(true);
  6.     PropertyMap&lt;PlanDTO, Plan&gt; itemMap1 = new PropertyMap&lt;PlanDTO, Plan&gt;() {
  7. 		protected void configure() {
  8. 			map().setFormula(source.getFormula());
  9. 			map().setFrequency(source.getFrequency());
  10. 			map().setId(new Plan(source.getId(), source.getName()));
  11. 			map().setPricingTable(source.getPricingtable());
  12. 		}
  13. 	};
  14. 	modelMapper.addMappings(itemMap1);
  15. }

But this happens at runtime debug image

Is there something wrong with the configuration? Do I miss something?

答案1

得分: 2

我不太确定你的问题是什么，但是使用只有一个属性映射的映射应该很容易：

  1. modelMapper.addMappings(new PropertyMap<PlanDTO, Plan>() {
  2.     @Override
  3.     protected void configure() {
  4.         map().getId().setName(source.getName());
  5.     }            
  6. });

所有其他字段都应该根据它们的名称隐式映射。甚至是 PlanId.id。

英文:

I am not quite sure what is your problem but mapping should be quite easy with a just one property mapping:

  1. modelMapper.addMappings(new PropertyMap&lt;PlanDTO, Plan&gt;() {
  2.     @Override
  3.     protected void configure() {
  4.         map().getId().setName(source.getName());
  5.     }            
  6. });

All the other fields should be implicitly mapped by their name. Even the PlanId.id.

huangapple
  • 本文由 发表于 2020年10月15日 00:10:42
  • 转载请务必保留本文链接：https://go.coder-hub.com/64357392.html
  • java
  • modelmapper
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