无法在Room dao界面中使用Completable [英] Unable to use Completable in Room dao interface

问题描述

我正在尝试在@Insert注释方法的Dao类中使用Completable，但是在尝试编译项目时，出现此错误:

I'm trying to use Completable in Dao class on @Insert annotated methods but when tried to compile the project, I've got this error:

error: Methods annotated with @Insert can return either void, long, Long, long[], Long[] or List<Long>.
public abstract io.reactivex.Completable insert(@org.jetbrains.annotations.NotNull()

这是我的相关代码:

@Insert
fun insert(kanal: Kanal): Completable
@Update
fun update(kanal: Kanal): Completable
@Delete
fun delete(kanal: Kanal): Completable

我的依赖项:

def room_version = "1.1.1"
implementation "android.arch.persistence.room:runtime:$room_version"
kapt "android.arch.persistence.room:compiler:$room_version"
implementation "android.arch.persistence.room:rxjava2:$room_version"
implementation 'io.reactivex.rxjava2:rxkotlin:2.2.0'
implementation 'io.reactivex.rxjava2:rxandroid:2.1.0'

根据此链接，它受支持按房间.

According to this link it's supported by Room.

推荐答案

@ Insert，@ Update和@Delete方法:Room 2.1.0和更高版本支持 返回类型为Completable，Single和Maybe的值.

@Insert, @Update, and @Delete methods: Room 2.1.0 and higher supports return values of type Completable, Single, and Maybe.

将您的房间从1.1.1更新到2.1.0或更高，它将可以正常工作.

Update your room from 1.1.1 to 2.1.0 or higher and it will work.

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