Spring Data JPA不会一对多填充子表

Question

I have a JSON like this:

{
  "pcSignatureHash": "String",
  "pcSignature": "String",
  "infectedBy": "String",
  "agent": {
    "userCode": 0
  },
  "pc": {
    "name": "String",
    "userName": "String",
    "osType": "String",
    "domainName": "String",
    "cpuId": "String",
    "osVersion": "String",
    "macId": "String",
    "vm": true,
    "friendlyName": "String",
    "statuses": [
      {
        "firewall": true,
        "firewallTestDate": "String"
      }
    ]
  }
}

It's not storing the statuses in the database.

The infections has 1 to 1 relationship with pcs and pcs has 1 to Many relationship with the statuses .

The models are properly set like 1 have Infections in PCs and have Set<Statuses> in the PCs and Statuses has PCs in its model.

Is there any other way to store the data? If I store the statuses separately that doesn't make a sense it stores the PCs twice because we need to pass the PCs object as a foreign key.

Answer 1

You missunderstood the Relational Mapping. In a OneToMany Relationship you have one side with @OneToMany and one with @ManyToOne .

Answer 2

Your entities should be like below . please modify accordingly.

Cart entity

@Entity
@Table(name="CART")
public class Cart {

@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
@Column(name="cart_id")
private long id;

@Column(name="total")
private double total;

@Column(name="name")
private String name;

@OneToMany(mappedBy="cart")
private Set<Items> items;

// Getter Setter methods for properties

}

Item Entity

@Entity
@Table(name="ITEMS")
public class Items {

@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
@Column(name="id")
private long id;

@Column(name="item_id")
private String itemId;

@Column(name="item_total")
private double itemTotal;

@Column(name="quantity")
private int quantity;

@ManyToOne
@JoinColumn(name="cart_id", nullable=false)
private Cart cart;
// Getter Setter methods for properties

}