Code + comment cleanup for the entities

ref #39

src/models/entities/Track.ts

@@ -1,7 +1,6 @@
 import {
   IsInt,
   IsNotEmpty,
-
   IsPositive,
   IsString
 } from "class-validator";
@@ -10,7 +9,7 @@ import { ScanStation } from "./ScanStation";
 import { TrackScan } from "./TrackScan";
 
 /**
- * Defines a track of given length.
+ * Defines the Track entity.
 */
 @Entity()
 export class Track {
@@ -23,6 +22,7 @@ export class Track {
 
   /**
    * The track's name.
+   * Mainly here for UX.
    */
   @Column()
   @IsString()
@@ -31,6 +31,7 @@ export class Track {
 
   /**
    * The track's length/distance in meters.
+   * Will be used to calculate runner's ran distances.
    */
   @Column()
   @IsInt()
@@ -38,13 +39,15 @@ export class Track {
   distance: number;
 
   /**
-   * Used to link scan stations to track.
+   * Used to link scan stations to a certain track.
+   * This makes the configuration of the scan stations easier.
    */
   @OneToMany(() => ScanStation, station => station.track, { nullable: true })
   stations: ScanStation[];
 
   /**
    * Used to link track scans to a track.
+   * The scan will derive it's distance from the track's distance.
    */
   @OneToMany(() => TrackScan, scan => scan.track, { nullable: true })
   scans: TrackScan[];