android - 构建房间期间发生 StackOverflowError

Question

我正在尝试使用空间并写下:

@Entity(foreignKeys = arrayOf(ForeignKey(entity = Category::class, 
parentColumns = arrayOf("id"), childColumns = arrayOf("parentId"))))
data class Category (
    val type: Byte,

    val name: String,

    val description: String,

    var parentId: Long? = null,

    var remoteId: Long? = null,

    @PrimaryKey(autoGenerate = true)
    val id: Long = 0L,

    @Relation(parentColumn = "id", entityColumn = "parentId")
    var subcategories: List<Category>? = null
)

但是我明白了:

Error:Execution failed for task ':app:kaptDebugKotlin'.
> Internal compiler error. See log for more details

和更多细节:

 java.lang.IllegalStateException: failed to analyze: 
 java.lang.StackOverflowError
 at org.jetbrains.kotlin.analyzer.AnalysisResult.throwIfError(AnalysisResult.kt:57)

也许有人会遇到这个问题(因为没有子类别字段一切正常)。

谢谢!

Answer 1

引用 the documentation for @Relation :

Note that @Relation annotation can be used only in Pojo classes, an Entity class cannot have relations.

理想情况下，您会得到比 StackOverflowError 更好的构建错误，但您应该会得到某种形式的构建错误。