Added missing getter

src/models/Runner.ts

@@ -1,5 +1,5 @@
 import { Entity, Column, OneToMany, ManyToOne } from "typeorm";
-import { IsNotEmpty,} from "class-validator";
+import { IsInt, IsNotEmpty,} from "class-validator";
 import { Participant } from "./Participant";
 import { RunnerGroup } from "./RunnerGroup";
 import { DistanceDonation } from "./DistanceDonation";
@@ -36,4 +36,10 @@ export class Runner extends Participant {
    */
   @OneToMany(() => Scan, scan => scan.runner)
   scans: Scan[];
+
+  @IsInt() 
+  public get distance() : number {
+    return this.scans.filter(scan => scan.valid === true).reduce((sum, current) => sum + current.distance, 0);
+  }
+  
 }