Extend Express req.cleanBody type, lodash to pick input variables from schema.shape

api/package-lock.json

@@ -18,6 +18,7 @@
       },
       "devDependencies": {
         "@types/express": "^5.0.3",
+        "@types/lodash": "^4.17.20",
         "drizzle-kit": "^0.31.4",
         "tsx": "^4.20.3",
         "typescript": "^5.8.3"
@@ -944,6 +945,13 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/lodash": {
+      "version": "4.17.20",
+      "resolved": "https://registry.npmjs.org/@types/lodash/-/lodash-4.17.20.tgz",
+      "integrity": "sha512-H3MHACvFUEiujabxhaI/ImO6gUrd8oOurg7LQtS7mbwIXA/cUqWrvBsaeJ23aZEPk1TAYkurjfMbSELfoCXlGA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/mime": {
       "version": "1.3.5",
       "resolved": "https://registry.npmjs.org/@types/mime/-/mime-1.3.5.tgz",

api/package.json

@@ -24,6 +24,7 @@
   },
   "devDependencies": {
     "@types/express": "^5.0.3",
+    "@types/lodash": "^4.17.20",
     "drizzle-kit": "^0.31.4",
     "tsx": "^4.20.3",
     "typescript": "^5.8.3"

api/src/db/productsSchema.ts

@@ -1,4 +1,5 @@
 import { int, mysqlTable, text, bigint, varchar, double } from 'drizzle-orm/mysql-core';
+import { createInsertSchema , createSelectSchema, createUpdateSchema } from 'drizzle-zod';
 
 export const productsTable = mysqlTable('products', {
   id: int().autoincrement().primaryKey(),
@@ -6,4 +7,15 @@ export const productsTable = mysqlTable('products', {
   description: text(),
   image: varchar({ length: 255 }),
   price: double().notNull(),
-});
+});
+
+
+// const createProductSchema = z.object({
+//     name: z.string(),
+//     price: z.number({ message: "not a number you idiot."}),
+// });
+
+export const createProductSchema = createInsertSchema(productsTable).omit({
+  id: true,
+});
+

api/src/middlewares/validationMiddleware.ts

@@ -1,11 +1,13 @@
 import { Request, Response, NextFunction } from 'express';
 import { z, ZodError, ZodTypeAny } from 'zod';
 import { ZodObject } from 'zod/v4';
+import _ from 'lodash';
 
 export function validateData(schema: ZodObject) {
   return (req: Request, res: Response, next: NextFunction) => {
     try {
       schema.parse(req.body);
+      req.cleanBody = _.pick(req.body, Object.keys(schema.shape));
       next();
     } catch (error) {
       // console.log(error);

api/src/routes/products/index.ts

@@ -7,16 +7,9 @@ import { listProducts,
 } from "./productsController";
 import { validateData } from "../../middlewares/validationMiddleware";
 import { z, ZodObject, ZodTypeAny } from 'zod/v4';
-import { createInsertSchema , createSelectSchema, createUpdateSchema } from 'drizzle-zod';
+import { productsTable, createProductSchema } from "../../db/productsSchema";
-import { productsTable } from "../../db/productsSchema";
-
-// const createProductSchema = z.object({
-//     name: z.string(),
-//     price: z.number({ message: "not a number you idiot."}),
-// });
 
 
-const createProductSchema = createInsertSchema(productsTable).omit({id: true});
 type ProductType = z.infer<typeof createProductSchema>;
 
 const router = Router();

api/src/routes/products/productsController.ts

@@ -1,7 +1,10 @@
 import {Request, Response} from 'express';
 import {db} from '../../db/index';
 import {eq} from 'drizzle-orm';
-import { productsTable } from '../../db/productsSchema';
+import { productsTable, createProductSchema } from "../../db/productsSchema";
+import _ from 'lodash';
+
+
 
 export async function listProducts(req: Request, res: Response) {
     try{
@@ -33,9 +36,10 @@ export async function getProductById(req: Request, res: Response) {
 
 export async function createProduct(req: Request, res: Response) {
     try{
+
         const productId = await db
         .insert(productsTable)
-        .values(req.body)
+        .values(req.cleanBody)
         .$returningId()
         //const [product] = await db.insert(productsTable).values(req.body).Returning()
         //Postgresql can return series of products so we can capture the first one from array[]

api/src/type/express/index.d.ts

@@ -0,0 +1,11 @@
+// to make the file a module and avoid the TypeScript error
+export {};
+
+declare global {
+  namespace Express {
+    export interface Request {
+      userId?: Number;
+      cleanBody?: any
+    }
+  }
+}