Question

这是我要解析的JSON：-

{
  "data": {
    "relationships": {
      "event": {
        "links": {
          "self": "/v1/feedbacks/1/relationships/event",
          "related": "/v1/feedbacks/1/event"
        }
      },
      "user": {
        "links": {
          "self": "/v1/feedbacks/1/relationships/user",
          "related": "/v1/feedbacks/1/user"
        }
      }
    },
    "attributes": {
      "rating": "4",
      "comment": "Awesome event"
    },
    "type": "feedback",
    "id": 1,
    "links": {
      "self": "/v1/feedbacks/1"
    }
  },
  "jsonapi": {
    "version": "1.0"
  },
  "links": {
    "self": "/v1/feedbacks/1"
  }
}

我想从用户对象和自链接中获取用户名。立即编写，仅能从atributes对象获得评分和评论，以下是一些代码：-

Feedback.kt

@Type("feedback")
@JsonNaming(PropertyNamingStrategy.KebabCaseStrategy::class)
@Entity
data class Feedback(
    @Id(LongIdHandler::class)
    @PrimaryKey
    val id: Long? = null,
    val rating: String?,
    val comment: String?,
    @Relationship("event")
    var event: EventId? = null,
    @Relationship("user")
    var user: UserId? = null
)

FeedbackAPI.kt

interface FeedbackApi {

    @GET("events/{eventId}/feedbacks?include=event")
    fun getEventFeedback(
        @Path("eventId") eventId: Long,
        @Query("sort") sort: String = "rating",
        @Query("filter") eventName: String = "[]"
    ): Single<List<Feedback>>

    @POST("feedbacks")
    fun postfeedback(@Body feedback: Feedback): Single<Feedback>
}

FeedbackDao.kt

@Dao
interface FeedbackDao {

    @Insert(onConflict = REPLACE)
    fun insertFeedback(feedbacks: List<Feedback>)

    @Insert(onConflict = REPLACE)
    fun insertSingleFeedback(feedback: Feedback)

    @Query("SELECT * FROM feedback WHERE event = :eventId")
    fun getAllFeedbackUnderEvent(eventId: Long): Single<List<Feedback>>
}

FeedbackViewHolder.kt

package org.fossasia.openevent.general.feedback

import android.view.View
import androidx.recyclerview.widget.RecyclerView
import kotlinx.android.synthetic.main.item_feedback.view.*

const val MAX_COMMENT_LINE = 3

class FeedbackViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {

    fun bind(feedback: Feedback) {
        itemView.commentTv.text = feedback.comment
        itemView.ratingBar.rating = feedback.rating?.toFloat() ?: 0f

        itemView.commentTv.setOnClickListener {
            itemView.commentTv.maxLines =
                if (itemView.commentTv.maxLines == MAX_COMMENT_LINE) Int.MAX_VALUE else MAX_COMMENT_LINE
        }
    }
}

FeedbackService.kt

class FeedbackService(
    private val feedbackDao: FeedbackDao,
    private val feedbackApi: FeedbackApi
) {
    fun getFeedbackUnderEventFromDb(eventId: Long): Single<List<Feedback>> =
        feedbackDao.getAllFeedbackUnderEvent(eventId)

    fun getEventFeedback(id: Long): Single<List<Feedback>> =
        feedbackApi.getEventFeedback(id).doOnSuccess {
            feedbackDao.insertFeedback(it)
        }

    fun submitFeedback(feedback: Feedback): Single<Feedback> =
        feedbackApi.postfeedback(feedback).doOnSuccess {
            feedbackDao.insertSingleFeedback(it)
        }
}

我该怎么做才能在android，restofit 2和json api中使用kotlin达到以下要求？

我想从带有关系链接的嵌套json获取数据

0 个答案: