Reverted to id based relation setter

ref #13

src/errors/AddressErrors.ts

@@ -6,7 +6,7 @@ export class AddressWrongTypeError extends NotAcceptableError {
 	name = "AddressWrongTypeError"
 
 	@IsString()
-	message = "The address must be either a existing address, new address or a existing adress's id. \n You provided a object of another type."
+	message = "The address must be an existing adress's id. \n You provided a object of another type."
 }
 
 export class AddressNotFoundError extends NotFoundError {

src/errors/GroupContactErrors.ts

@@ -6,7 +6,7 @@ export class GroupContactWrongTypeError extends NotAcceptableError {
 	name = "GroupContactWrongTypeError"
 
 	@IsString()
-	message = "The groupContact must be either a existing groupContact, new groupContact or a existing adress's id. \n You provided a object of another type."
+	message = "The groupContact must be an existing groupContact's id. \n You provided a object of another type."
 }
 
 export class GroupContactNotFoundError extends NotFoundError {

src/errors/RunnerErrors.ts

@@ -1,5 +1,5 @@
-import { JsonController, Param, Body, Get, Post, Put, Delete, NotFoundError, OnUndefined, NotAcceptableError } from 'routing-controllers';
-import { IsInt, IsNotEmpty, IsPositive, IsString } from 'class-validator';
+import { IsString } from 'class-validator';
+import { NotAcceptableError, NotFoundError } from 'routing-controllers';
 
 /**
  * Error to throw when a runner couldn't be found.

src/errors/RunnerOrganisationErrors.ts

@@ -55,5 +55,5 @@ export class RunnerOrganisationWrongTypeError extends NotAcceptableError {
 	name = "RunnerOrganisationWrongTypeError"
 
 	@IsString()
-	message = "The runner organisation must be either a existing organisation, new organisation or a existing organisation's id. \n You provided a object of another type."
+	message = "The runner organisation must be an existing organisation's id. \n You provided a object of another type."
 }