backend: add fields validation schema for RoomMember and update filters to use typed array

meet-ce/backend/src/models/zod-schemas/recording.schema.ts

@@ -9,9 +9,11 @@ import {
 import { z } from 'zod';
 import { encodingValidator, nonEmptySanitizedRoomId } from './room.schema.js';
 
-// Shared fields validation schema for Recording entity
-// Validates and transforms comma-separated string to typed array
-// Only allows fields that exist in MEET_RECORDING_FIELDS
+/**
+ * Shared fields validation schema for Recording entity
+ * Validates and transforms comma-separated string to typed array
+ * Only allows fields that exist in MEET_RECORDING_FIELDS
+ */
 const fieldsSchema = z
 	.string()
 	.optional()

meet-ce/backend/src/models/zod-schemas/room-member.schema.ts

@@ -1,6 +1,7 @@
 import {
+	MEET_ROOM_MEMBER_FIELDS,
 	MEET_ROOM_MEMBER_SORT_FIELDS,
-	MeetRoomMemberFilters,
+	MeetRoomMemberField,
 	MeetRoomMemberOptions,
 	MeetRoomMemberPermissions,
 	MeetRoomMemberRole,
@@ -10,6 +11,32 @@ import {
 } from '@openvidu-meet/typings';
 import { z } from 'zod';
 
+/**
+ * Shared fields validation schema for RoomMember entity
+ * Validates and transforms comma-separated string to typed array
+ * Only allows fields that exist in MEET_ROOM_MEMBER_FIELDS
+ */
+const fieldsSchema = z
+	.string()
+	.optional()
+	.transform((value) => {
+		if (!value) return undefined;
+
+		const requested = value
+			.split(',')
+			.map((field) => field.trim())
+			.filter((field) => field !== '');
+
+		// Filter: only keep valid fields that exist in MeetRoomMember
+		const validFields = requested.filter((field) =>
+			MEET_ROOM_MEMBER_FIELDS.includes(field as MeetRoomMemberField)
+		) as MeetRoomMemberField[];
+
+		const unique = Array.from(new Set(validFields));
+
+		return unique.length > 0 ? unique : undefined;
+	});
+
 const RoomMemberRoleSchema: z.ZodType<MeetRoomMemberRole> = z.nativeEnum(MeetRoomMemberRole);
 
 export const MeetPermissionsSchema: z.ZodType<MeetRoomMemberPermissions> = z.object({
@@ -67,9 +94,9 @@ export const RoomMemberOptionsSchema: z.ZodType<MeetRoomMemberOptions> = z
 		}
 	);
 
-export const RoomMemberFiltersSchema: z.ZodType<MeetRoomMemberFilters> = z.object({
+export const RoomMemberFiltersSchema = z.object({
 	name: z.string().optional(),
-	fields: z.string().optional(),
+	fields: fieldsSchema,
 	maxItems: z.coerce
 		.number()
 		.positive('maxItems must be a positive number')

meet-ce/typings/src/response/room-member-response.ts

@@ -2,6 +2,27 @@ import { MeetRoomMemberPermissions } from '../database/room-member-permissions.j
 import { MeetRoomMember, MeetRoomMemberRole } from '../database/room-member.entity.js';
 import { SortAndPagination, SortableFieldKey } from './sort-pagination.js';
 
+/**
+ * List of all valid fields that can be selected from a MeetRoomMember.
+ * This array is the source of truth and TypeScript validates it matches the MeetRoomMember interface.
+ */
+export const MEET_ROOM_MEMBER_FIELDS = [
+	'memberId',
+	'roomId',
+	'name',
+	'membershipDate',
+	'accessUrl',
+	'baseRole',
+	'customPermissions',
+	'effectivePermissions',
+	'permissionsUpdatedAt'
+] as const satisfies readonly (keyof MeetRoomMember)[];
+
+/**
+ * Properties of a {@link MeetRoomMember} that can be included in the API response when fields filtering is applied.
+ */
+export type MeetRoomMemberField = (typeof MEET_ROOM_MEMBER_FIELDS)[number];
+
 /**
  * Room member fields that are allowed for sorting in room member list queries.
  */
@@ -21,8 +42,8 @@ export type MeetRoomMemberSortField = (typeof MEET_ROOM_MEMBER_SORT_FIELDS)[numb
 export interface MeetRoomMemberFilters extends SortAndPagination<MeetRoomMemberSortField> {
 	/** Filter by member name (partial match) */
 	name?: string;
-	/** Comma-separated list of fields to include in the response (e.g., "userId,name,baseRole") */
-	fields?: string;
+	/** Array of fields to include in the response */
+	fields?: MeetRoomMemberField[];
 }
 
 /**