Added middleware to handle empty strings as null

src/routes/api/v1/index.ts

@@ -9,10 +9,19 @@ import storageLocationRoute from './storageLocations.js';
 
 import search_routes from './search/index.js';
 
-
 // Router base is '/api/v1'
 const Router = express.Router({ strict: false });
 
+// All empty strings are null values.
+Router.use('*', function (req, res, next) {
+	for (let key in req.body) {
+		if (req.body[key] === '') {
+			req.body[key] = null;
+		}
+	}
+	next();
+});
+
 Router.route('/items').get(itemRoute.get).post(itemRoute.post).patch(itemRoute.patch).delete(itemRoute.del);
 Router.route('/categories').get(categoryRoute.get).post(categoryRoute.post).patch(categoryRoute.patch).delete(categoryRoute.del);
 // TODO: Migrate routes to lowercase.