feat(orm): exclude function fields from FieldName type

Author: Char2sGu

Diff for: packages/orm/src/utils.ts

@@ -16,7 +16,7 @@ import { getInstanceStateFromItem } from './identity-map';
 import { getClassTypeFromInstance } from '@deepkit/core';
 
 export type FlattenIfArray<T> = T extends Array<any> ? T[0] : T;
-export type FieldName<T> = keyof T & string;
+export type FieldName<T> = { [Key in keyof T & string]: T[Key] extends Function ? never : Key }[keyof T & string];
 
 export function getClassSchemaInstancePairs<T extends OrmEntity>(items: Iterable<T>): Map<ReflectionClass<any>, T[]> {
     const map = new Map<ReflectionClass<any>, T[]>();

Diff for: packages/orm/tests/query.spec.ts

@@ -4,6 +4,7 @@ import { assert, IsExact } from 'conditional-type-checks';
 import { Database } from '../src/database';
 import { MemoryDatabaseAdapter, MemoryQuery } from '../src/memory-db';
 import { Query } from '../src/query';
+import { FieldName } from "../src/utils";
 
 test('query select', async () => {
     class s {
@@ -54,7 +55,7 @@ test('query lift', async () => {
 
     class UserQuery<T extends { username: string }> extends MyBase<T> {
         findAllUserNames() {
-            return this.findField('username');
+            return this.findField('username' as FieldName<T>);
         }
 
         //query classes should be able to infer the actual used class