Cleaned up a load of relations and optional stuff

ref #11

src/models/entities/Participant.ts

@@ -1,13 +1,13 @@
-import { PrimaryGeneratedColumn, Column, OneToMany, ManyToOne, Entity, TableInheritance } from "typeorm";
 import {
   IsEmail,
   IsInt,
   IsNotEmpty,
   IsOptional,
   IsPhoneNumber,
-  IsPositive,
-  IsString,
+
+  IsString
 } from "class-validator";
+import { Column, Entity, ManyToOne, OneToMany, PrimaryGeneratedColumn, TableInheritance } from "typeorm";
 import { Address } from "./Address";
 import { Donation } from "./Donation";
 
@@ -21,7 +21,6 @@ export abstract class Participant {
    * Autogenerated unique id (primary key).
    */
   @PrimaryGeneratedColumn()
-  @IsOptional()
   @IsInt()
   id: number;