refactor: make Donation.donor optional

src/models/actions/create/CreateDonation.ts

@@ -1,6 +1,5 @@
 import { IsInt, IsOptional, IsPositive } from 'class-validator';
 import { getConnection } from 'typeorm';
-import { DonorNotFoundError } from '../../../errors/DonorErrors';
 import { Donation } from '../../entities/Donation';
 import { Donor } from '../../entities/Donor';
 
@@ -14,6 +13,7 @@ export abstract class CreateDonation {
      */
     @IsInt()
     @IsPositive()
+    @IsOptional()
     donor: number;
 
     /**
@@ -33,9 +33,6 @@ export abstract class CreateDonation {
      */
     public async getDonor(): Promise<Donor> {
         const donor = await getConnection().getRepository(Donor).findOne({ id: this.donor });
-        if (!donor) {
-            throw new DonorNotFoundError();
-        }
         return donor;
     }
 }