add unique constraint in room database to multiple column

Question

I have one entity in room

@Entity(foreignKeys ={
        @ForeignKey(entity = Label.class, parentColumns = \"_id\", childColumns = \"labelId\", onDelete = CA         


        

Answer 1

If you wonder to make a single column to be unique, only need to write

@Entity(indices = [Index(value = ["name"], unique = true)])