RxJava（+ Room）：为什么可流动 <List<MyObject> &gt;返回清单 <List<MyObject> &gt;？

Question

My Room query(from MyObjectDao) with Flowable<List<MyObject>> is returning List<List<MyObject>> when running tests. Here is the query:

@Query("SELECT * FROM myobjects")
Flowable<List<MyObject>> getAllMyObjects();

Here is how I am extracting the first MyObject from the query:

MyObject toDelete = myObjectDao.getAllMyObjects().test().values().get(0).get(0);

As you can see, I am getting a List<List<MyObject>> from the query? Why is that? Why is it getting wrapped inside another List?

Answer 1

values() returns all the emissions acquired over the lifetime of your Flowable . As each emission from your Flowable is a List , values() will return a list of all y our emissions of lists.