diff --git a/src/services/user.ts b/src/services/user.ts
index c9ee87a..724c280 100644
--- a/src/services/user.ts
+++ b/src/services/user.ts
@@ -64,27 +64,23 @@ export const queryUsers = async ({
   limit = 10,
   page = 1,
 }: QueryUsers) => {
-  const whereConditions: Record<string, unknown> = {}
-  if (name) {
-    whereConditions.name = {
-      contains: name,
-    }
-  }
-  if (role) {
-    whereConditions.role = role
-  }
-
-  const orderByConditions: Record<string, unknown> = {}
-  if (orderBy) {
-    orderByConditions[orderBy] = order
-  }
-
   const result = await paginate({
     modelName: 'User',
     page,
     pageSize: limit,
-    where: whereConditions,
-    orderBy: orderByConditions,
+    where: {
+      role,
+      name: name
+        ? {
+            contains: name,
+          }
+        : undefined,
+    },
+    orderBy: orderBy
+      ? {
+          [orderBy]: order,
+        }
+      : undefined,
   })
 
   return result
diff --git a/src/utils/prisma.ts b/src/utils/prisma.ts
index 52f8e7c..f9d9980 100644
--- a/src/utils/prisma.ts
+++ b/src/utils/prisma.ts
@@ -2,8 +2,7 @@ import { Prisma, PrismaClient } from '@prisma/client'
 
 export const prisma = new PrismaClient()
 
-export type ModelNames =
-  (typeof Prisma.ModelName)[keyof typeof Prisma.ModelName]
+export type ModelNames = Prisma.ModelName
 
 type PrismaOperations<ModelName extends ModelNames> =
   Prisma.TypeMap['model'][ModelName]['operations']
@@ -31,6 +30,9 @@ export async function paginate<ModelName extends ModelNames>({
   // @ts-expect-error suppress type ModelName cannot be used to index type
   const db = prisma[modelName]
 
+  page = Math.max(1, Math.floor(page))
+  pageSize = Math.max(1, Math.floor(pageSize))
+
   const skip = (page - 1) * pageSize
 
   const [totalCount, items] = await Promise.all([
@@ -46,12 +48,13 @@ export async function paginate<ModelName extends ModelNames>({
     }),
   ])
 
-  const totalPages = Math.max(1, Math.ceil(totalCount / pageSize))
+  const totalPages = totalCount > 0 ? Math.ceil(totalCount / pageSize) : 0
 
   return {
     items,
     totalCount,
     page,
+    pageSize,
     totalPages,
   }
 }