How to fill non column field of entity in room library

Question

I have a class entity as below

@Entity
public class Task {    
    private String name; 
    private Integer ParentId;
    private Integer userId;   
    @Ignore         


        

Answer 1

I faced the same problem a few days ago and had a look at this thread. I am using Kotlin data classes for creating database entities. Given that Kotlin data classes do not play well with inheritance subclassing was not a viable option. My solution was to use the @Embedded keyword in a wrapping class, as follows:

data class TaskToDisplay(@Embedded
                         var task: Task,
                         var noOfSubTask: Int = 0)

This solution does not create an additional column in the database and most importantly matches all Task's fields with Room's response columns.