[英]Springboot Mapping and DTO
I'm new to Spring and I'm encountering a lot of doubts when making an insertion of the example below.我是 Spring 的新手,在插入下面的示例时遇到了很多疑问。 I currently have three tables whose models are those below:
我目前有三个表,其模型如下:
@Entity
@Table(name = "namespace")
public class Namespace {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
@NotNull
@Size(max = 100)
@Column(unique = true)
private String namespacename;
}
@Entity
@Table(name = "services")
public class Services {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
@NotNull
@Size(max = 100)
@Column(unique = true)
private String servicename;
}
@Entity
@Table(name = "historiquedeploiement")
public class HistoriqueDeploiement {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
@ManyToOne(fetch = FetchType.LAZY, optional = false)
@JoinColumn(name = "idnamespace", nullable = false)
@JsonIdentityInfo(generator=ObjectIdGenerators.PropertyGenerator.class, property="id")
@JsonIdentityReference(alwaysAsId=true)
@JsonProperty("idnamespace")
private Namespace namespace;
@ManyToOne(fetch = FetchType.LAZY, optional = false)
@JoinColumn(name = "idservices", nullable = false)
@JsonIdentityInfo(generator=ObjectIdGenerators.PropertyGenerator.class, property="id")
@JsonIdentityReference(alwaysAsId=true)
@JsonProperty("idservices")
private Services services;
@NotNull
@Size(max = 100)
@Column(unique = true)
private String tagvalue;
}
And this is my DTO :这是我的 DTO:
public class HistoriqueDeploiementReadingDTO {
@NotNull
private Integer id;
@NotNull
private String namespacename;
@NotNull
private String servicename;
@NotNull
private String tagvalue;
}
So the problem is : I receive an object of type HistoriqueDeploiementReadingDTO and i have to insert it in historiquedeploiement table.所以问题是:我收到一个 HistoriqueDeploiementReadingDTO 类型的对象,我必须将它插入到 historiquedeploiement 表中。 The problem is that i receive "namespacename", "servicename" and i need to save the id of each one that i can find in the table namespace and service.
问题是我收到了“namespacename”、“servicename”,我需要保存我可以在表命名空间和服务中找到的每个 ID。
When i have the id of each one, i can save it in historiquedeploiement table.当我有每个人的 id 时,我可以将它保存在 historiquedeploiement 表中。
I hope you understand that little problem and hope you can purpose me something :) Thanks !我希望你理解这个小问题,并希望你能给我一些东西:) 谢谢!
You have 2 ways:你有两种方式:
First of all首先
if relation is many to one your field is List of services and List of namespaces instead services and namespaces.如果关系是多对一,您的字段是服务列表和名称空间列表,而不是服务和名称空间。
if you mean OneToOne如果你的意思是一对一
HistoriqueDeploiementReadingDTO historiqueDeploiementReadingDTO;
NameSpace nameSpace = new Namespace();
namespace.setNameSpaceName(historiqueDeploiementReadingDTO.getNameSpaceName());
Services service = new Service();
service.setServicename(historiqueDeploiementReadingDTO.getServiceName())
HistoriqueDeploiement historiqueDeploiement = new HistoriqueDeploiement;
historiqueDeploiement.setTagValue(historiqueDeploiementReadingDTO.getTagValue())
historiqueDeploiement.setService(service)
historiqueDeploiement.setNameSpaceName(nameSpace)
IHistoriqueDeploiementRepository.save(historiqueDeploiement);
2 - 2 -
You should first validate what you receive(against db records of each table).您应该首先验证您收到的内容(针对每个表的数据库记录)。 More or less the following will give you a highlight, so you should do for the others too.
以下或多或少会给你一个亮点,所以你也应该为其他人做。 Don't forget that all should be on the same transaction.
不要忘记,所有人都应该在同一个事务上。
== updated== ==更新==
@Transactional(rollbackFor=Exception.class)
public boolean saveHistoriqueDeploiement(HistoriqueDeploiementReadingDTO dto) {
Services service = getServices(dto.getServicename());
// do the same for the others
HistoriqueDeploiement deploiment = new HistoriqueDeploiement();
deploiment.setService(service);
//same for the others
deploiementRepository.save(deploiment);
}
public Services getServices(String serviceName) {
Services service = serviceRepository.findByServicename(serviceName); //if it exists, use the existing
if(service == null) {
service = new Services();
service.setServicename(dto.getServicename());
service = serviceRepository.save(service);
}
return service;
}
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