Added relations for runner cards

ref #11

src/models/Runner.ts

@@ -3,6 +3,7 @@ import { IsNotEmpty,} from "class-validator";
 import { Participant } from "./Participant";
 import { RunnerGroup } from "./RunnerGroup";
 import { DistanceDonation } from "./DistanceDonation";
+import { RunnerCard } from "./RunnerCard";
 
 /**
  * Defines a runner.
@@ -22,4 +23,10 @@ export class Runner extends Participant {
    */
   @OneToMany(() => DistanceDonation, distanceDonation => distanceDonation.runner)
   distanceDonations: DistanceDonation[];
+
+  /**
+   * Used to link runners to cards.
+   */
+  @OneToMany(() => RunnerCard, card => card.runner)
+  cards: RunnerCard[];
 }