Room one-to-many warning

Question

When creating my contact DAO and related classes, I am getting the following error:

The query returns some columns [mContactId, mAddress, mPostcode, mCity, mCoun         


        

Answer 1

It's say very clear: You can use @ColumnInfo annotation on the fields to specify the mapping.

Change your code like this:

@NonNull
@PrimaryKey
@ColumnInfo(name = "id")
private String id;

More at codelab: https://codelabs.developers.google.com/codelabs/android-room-with-a-view/#0