Question

我有一个项目，我有一个用于SQLite的DBFlow库。

当我尝试从表中删除一些数据时，会出现问题。

override fun removeOldEventPlanners(): Single<Boolean> {
    LogMgr.v(TAG, "removeOldEventPlanners()")
    return Single.create { emitter ->
        RXSQLite.rx(SQLite.delete().from(EventPlanner::class.java)
                .where(EventPlanner_Table.date_to.lessThan(Date(TimeUtil.getCurrentTime().time - CONST_30_DAYS_IN_MILLISECONDS)))
                .or(EventPlanner_Table.deleted.`is`(1)))
                .queryList()
                .subscribe({ eventPlanners ->
                    LogMgr.d(TAG, "removeOldEventPlanners queryList() $eventPlanners")
                    emitter.onSuccess(true)
                }, { throwable ->
                    LogMgr.e(TAG, "removeOldEventPlanners error", throwable)
                    emitter.onError(throwable)
                })
    }
}

此代码引发异常：

 java.lang.IllegalArgumentException: Please use query(). The beginning is not a ISelect
    at com.raizlabs.android.dbflow.sql.language.Where.checkSelect(Where.java:259)
    at com.raizlabs.android.dbflow.sql.language.Where.queryList(Where.java:235)
    at com.raizlabs.android.dbflow.rx2.language.RXModelQueriableImpl$2.call(RXModelQueriableImpl.java:61)
    at com.raizlabs.android.dbflow.rx2.language.RXModelQueriableImpl$2.call(RXModelQueriableImpl.java:58)
    at io.reactivex.internal.operators.single.SingleFromCallable.subscribeActual(SingleFromCallable.java:44)
    at io.reactivex.Single.subscribe(Single.java:3575)
    at io.reactivex.Single.subscribe(Single.java:3561)
    at com.fs.wfm.storage.dbflow.DBFlowWfmStorageRepo$removeOldEventPlanners$1.subscribe(DBFlowWfmStorageRepo.kt:112)
    at io.reactivex.internal.operators.single.SingleCreate.subscribeActual(SingleCreate.java:39)
    at io.reactivex.Single.subscribe(Single.java:3575)
    at io.reactivex.internal.operators.single.SingleSubscribeOn$SubscribeOnObserver.run(SingleSubscribeOn.java:89)
    at io.reactivex.internal.schedulers.ScheduledDirectTask.call(ScheduledDirectTask.java:38)
    at io.reactivex.internal.schedulers.ScheduledDirectTask.call(ScheduledDirectTask.java:26)
    at java.util.concurrent.FutureTask.run(FutureTask.java:234)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
    at java.lang.Thread.run(Thread.java:841)

有人知道如何解决它吗？

Answer 1

delete不会返回值，因此使用queryList()来返回值作为list是不正确的，并且可以在堆栈跟踪中看到。

抛出java.lang.IllegalArgumentException的DBFlow SQLite.delete（）：请使用query（）

1 个答案: