预期 BEGIN_OBJECT 但在路径 Moshi Json 数据异常处是 BEGIN_ARRAY

Question

我正在使用 Moshi 作为 Retrofit 的转换器，但对于一个特定的请求它不起作用并引发异常：

com.squareup.moshi.JsonDataException：预期为 BEGIN_OBJECT，但在路径 $.animaux 处为 BEGIN_ARRAY

这是 Json

 "nb_animaux": 1,
    “动画”：[
        {
            "code_iso": "768010103010004",
            “相片”： []，
            “espece”：{
                “身份证”：1，
                “fr”：“牛”，
                "zh": "牛"
            },
            “高度”：{
                “参数地理”：{
                    “县”：“奥蒂”，
                    “地区”：“萨凡”，
                    “公社”：“芒果”，
                    “支付”：{
                        "fr": "多哥",
                        "zh": "多哥"
                    },
                    “村庄”：“丰博罗”
                },
                “type_elevage”：{}，
                “code_elevage”：“76801010301”
            },
            “性别”：“米”，
            "date_naissance": 1561932000,
            “类别”： {
                "fr": "金牛座",
                "zh": "公牛"
            },
            “业主”：{
                “身份证”：10，
                “全名”：“edem”，
                “地址”：“洛美”，
                “电话”：“98665478”
            }
        }
    ],
    "num_transport": "1/11/2019/TG",
    “日期运输”：1574784132，
    “特质”：假
}

我的模型课

@Entity
data class Animal(
    @field:PrimaryKey
    var id: Long,
    @ColumnInfo(name = "nb_animaux")
    @Json(name = "nb_animaux")
    var nbAnimaux : Int,
    @Embedded
    @get:Json(name = "animaux")
    var animaux : Animaux,
    @ColumnInfo(name = "num_transport")
    @Json(name = "num_transport")
    var numeroTransport : String,
    @ColumnInfo(name = "date_transport")
    @Json(name = "date_transport")
    var dateTransport : Long,
    var traite: Boolean

)
@JsonClass(generateAdapter = true)
data class Animaux(
    @ColumnInfo(name = "animaux_id")
    var id : Long,
    @ColumnInfo(name = "code_iso")
    @Json(name = "code_iso")
    var codeIso : Long,
    @Embedded
    var espece : Espece,
    @Embedded
    var elevage : Elevage,
    var sexe : String,
    @ColumnInfo(name = "date_naisance")
    @Json(name = "date_naisance")
    var dateNaissance : Long,
    @ColumnInfo(name = "race_pere")
    @Json(name = "race_pere")
    var racePere: String,
    @ColumnInfo(name = "race_mere")
    @Json(name = "race_mere")
    var raceMere: String,
    @Embedded
    var category: Category,
    @Embedded
    var proprietaire: Proprietaire

)
/*{
    constructor() : this(0, 0, Espece(0,"",""), Elevage(0, ParametreGeographique("","","",
        Country("",""),""
    ),0), "", 0, "", "", Category(0,"",""),Proprietaire
    (0,"","","",""))
}
 */
data class Espece(
    @ColumnInfo(name = "id_espece")
    @Json(name = "id_espece")
    var id: Long,
    var fr : String,
    var en : String
)
data class Elevage(
    @ColumnInfo(name = "id_elevage")
    @Json(name = "id_elevage")
    var id: Long,
    @Embedded
    var parametregeographique: ParametreGeographique,
    @ColumnInfo(name = "code_elevage")
    @Json(name = "code_elevage")
    var codeElevage : Long
)
data class ParametreGeographique(
    var prefecture : String,
    var region : String,
    var commune : String,
    @Embedded
    var pays : Country,
    var village : String
)
data class Country(
    @ColumnInfo(name = "fr_pays")
    @Json(name = "fr_pays")
    var fr : String,
    @ColumnInfo(name = "en_pays")
    @Json(name = "en_pays")
    var en : String
)

data class Category (
    @ColumnInfo(name = "id_category")
    var id: Long,
    @ColumnInfo(name = "fr_category")
    var fr : String,
    @ColumnInfo(name = "en_category")
    var en : String
)
data class Proprietaire(
    @ColumnInfo(name = "id_proprietaire")
    var id: Long,
    var fullname : String,
    var telephone : String,
    @ColumnInfo(name = "telephone_second")
    var telephoneSecond : String,
    @ColumnInfo(name = "photo_profile")
    var photoProfil : String
)

改造电话

@GET("marche-betail/transport/{id}")
fun commandesDetailFromServer(@Path("id") id: Long?): Observable<Animal>

我该如何处理错误。我尝试对Animaux 类使用构造函数，但出现错误。我也用了list<Animaux>，但是没用。

Answer 1

您的 JSON 有一个 Animaux 列表，而不仅仅是一个列表。所以你需要var animaux: List[Animaux]，而不仅仅是Animaux。

你如何在模型类中实现它。你能告诉我怎么做吗，因为当我尝试时我得到这个错误错误：Entities and POJOs must have a usable public constructor. You can have an empty constructor or a constructor whose parameters match the fields (by name and type). - java.util.List

房间doesn't support such fields directly。从技术上讲，您可以使其工作（请参阅Android room persistent library - how to insert class that has a List object field 的答案），但是您的数据绝对足够复杂，以至于我不会尝试对 JSON 和 Room 使用单个类；最终会得到一个非常un-normalized database。