Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community!

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Android Data Persistence with Room Working with Room Saving a Test Pizza

Tonnie Fanadez
.a{fill-rule:evenodd;}techdegree seal-36
Tonnie Fanadez
UX Design Techdegree Graduate 22,796 Points

Warning: toppingId column foreign key reference

Getting this warning while running tests

_ warning: toppingId column references a foreign key but it is not part of an index. This may trigger full table scans whenever parent table is modified so you are highly advised to create an index that covers this column. public final class PizzaTopping { _

Here is my PizzaTopping class

import android.arch.persistence.room.Entity
import android.arch.persistence.room.ForeignKey

@Entity(primaryKeys = ["pizzaId", "toppingId"], foreignKeys = [
    ForeignKey(entity = Pizza::class, parentColumns = ["id"], childColumns = ["pizzaId"]),
     ForeignKey(entity = Topping::class, parentColumns = ["id"], childColumns = ["toppingId"])])
data class PizzaTopping(val pizzaId: Int,
                        val toppingId: Int)

Searched for help online but didn't find a solution; please have a look and help