如何更改 Panache/Hibernate 实体的 DTO 中使用 Jackson 序列化的 JSON 结构？

Question

我在我的应用程序中定义了这两个实体：

@Entity
public class Avail extends PanacheEntity {
    public Integer total;
    public Integer limit;
    @JsonProperty("last_transactions")
    @OneToMany(
        mappedBy = "avail",
        cascade = CascadeType.ALL,
        orphanRemoval = true
    )
    public <List<Transactions> transactions = new LinkedList<>();

@Entity
public class Transactions extends PanacheEntityBase {
    public Integer value;
    public String type;
    public String description;
    @JsonProperty("datetime")
    public String ts;
    @JsonIgnore
    @ManyToOne(fetch = FetchType.LAZY)
    public Avail avail;

此 DTO 以 application/json 形式提供响应：

@JsonTypeInfo(use=Id.NAME, include=As.WRAPPER_OBJECT)
@JsonTypeName("avail")
@JsonPropertyOrder({ "total", "dataExtrato", "limit" })
public final class AvailDTO {

    public final Integer total;
    @JsonProperty("data_extrato")
    public final String dataExtrato;
    public final Integer limit;
    @JsonProperty("last_transactions")
    public final List<Transactions> transactions;

这些类生成此响应：

{
"avail": {
"total": 29000,
"data_extrato": "2024-02-24T11:50:15.294900Z",
"limit": 100000,
"last_transactions": \[{
"value": 21000,
"type": "d",
"description": "withdraw",
"datetime": "2024-02-24T14:46:00.904000300Z"
}, {
"value": 50000,
"type": "c",
"description": "deposit",
"datetime": "2024-02-24T14:46:17.837816Z"
}\]
}
}

但是我需要的响应看起来像这样（“last_transactions”位于“avail”之外）：

{
"avail": {
"total": 29000,
"data_extrato": "2024-02-24T11:50:15.294900Z",
"limit": 100000,
},
"last_transactions": \[{
"value": 21000,
"type": "d",
"description": "withdraw",
"datetime": "2024-02-24T14:46:00.904000300Z"
}, {
"value": 50000,
"type": "c",
"description": "deposit",
"datetime": "2024-02-24T14:46:17.837816Z"
}\]

}

无法弄清楚如何正确编码我的 DTO 来更改 JSON 结构。

Answer 1

我设法创建了另一个具有 2 个属性的 DTO，它将 AvailDTO 包装在一个属性上，并在另一个属性上设置事务列表。可能不是最优雅的解决方案，但它确实有效。 代码可以在https://github.com/marciocg/rinhaquarkus/tree/main/src/main/java/io/github/marciocg/clientes

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