Fixed key null constraint

ref #104

src/models/actions/create/CreateGroupContact.ts

@@ -29,7 +29,7 @@ export class CreateGroupContact {
     lastname: string;
 
     /**
-     * The new contact's address.
+     * The new participant's address.
      */
     @IsOptional()
     @IsObject()
@@ -55,14 +55,14 @@ export class CreateGroupContact {
      * Creates a new Address entity from this.
      */
     public async toEntity(): Promise<GroupContact> {
-        let contact: GroupContact = new GroupContact();
-        contact.firstname = this.firstname;
-        contact.middlename = this.middlename;
-        contact.lastname = this.lastname;
-        contact.email = this.email;
-        contact.phone = this.phone;
-        contact.address = this.address;
-        Address.validate(contact.address);
-        return contact;
+        let newContact: GroupContact = new GroupContact();
+        newContact.firstname = this.firstname;
+        newContact.middlename = this.middlename;
+        newContact.lastname = this.lastname;
+        newContact.email = this.email;
+        newContact.phone = this.phone;
+        newContact.address = this.address;
+        Address.validate(newContact.address);
+        return newContact;
     }
 }