Updated relationships to be nullable

ref #11 #13

src/models/Runner.ts

@@ -15,25 +15,25 @@ export class Runner extends Participant {
    * The runner's associated group.
    */
   @IsNotEmpty()
-  @ManyToOne(() => RunnerGroup, group => group.runners)
+  @ManyToOne(() => RunnerGroup, group => group.runners, { nullable: true })
   group: RunnerGroup;
   
   /**
    * Used to link runners to donations.
    */
-  @OneToMany(() => DistanceDonation, distanceDonation => distanceDonation.runner)
+  @OneToMany(() => DistanceDonation, distanceDonation => distanceDonation.runner, { nullable: true })
   distanceDonations: DistanceDonation[];
 
   /**
    * Used to link runners to cards.
    */
-  @OneToMany(() => RunnerCard, card => card.runner)
+  @OneToMany(() => RunnerCard, card => card.runner, { nullable: true })
   cards: RunnerCard[];
 
   /**
    * Used to link runners to a scans
    */
-  @OneToMany(() => Scan, scan => scan.runner)
+  @OneToMany(() => Scan, scan => scan.runner, { nullable: true })
   scans: Scan[];
 
   @IsInt()