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How to Build Inventory tracking platform with V0

Build a multi-location inventory tracking platform with V0 using Next.js, Supabase, and Recharts. Track real-time stock levels across warehouses, retail stores, and fulfillment centers with inter-location transfer workflows, computed available quantities, and demand analytics — all in about 1-2 hours.

What you'll build

  • Cross-location stock matrix showing quantities at every warehouse, retail store, and fulfillment center
  • Transfer workflow with stepper-style UI for moving stock between locations atomically
  • Computed available column using PostgreSQL generated columns to exclude reserved stock
  • Command palette for fast item search across all locations by SKU or name
  • Stock-over-time trend charts with Recharts showing demand patterns per item
  • RLS policies scoped to organization to prevent cross-tenant data leaks
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Intermediate12 min read1-2 hoursV0 Premium or higherApril 2026RapidDev Engineering Team
TL;DR

Build a multi-location inventory tracking platform with V0 using Next.js, Supabase, and Recharts. Track real-time stock levels across warehouses, retail stores, and fulfillment centers with inter-location transfer workflows, computed available quantities, and demand analytics — all in about 1-2 hours.

What you're building

E-commerce sellers managing stock across multiple locations — a warehouse, retail store, and Amazon FBA — constantly lose track of where inventory actually is. A unified tracking platform gives you one view of all stock, transfer workflows to move items between locations, and analytics to spot demand trends.

V0 accelerates this build by generating the complex DataTable views, transfer forms, and chart components from natural language prompts. Use the Connect panel to wire up Supabase in one click, then queue up to 10 prompts to build the matrix view, transfer form, and analytics chart in sequence without waiting.

The architecture uses Server Components for the stock matrix (fast initial load), PostgreSQL generated columns for computed available quantities, Supabase RPC functions for atomic transfer operations, and client components with Recharts for interactive trend charts.

Final result

A multi-location inventory tracking platform with a stock matrix, transfer queue, demand trend charts, and organization-scoped access control.

Tech stack

V0AI Code Generator
Next.jsFull-Stack Framework
Tailwind CSSStyling
shadcn/uiComponent Library
SupabaseDatabase
RechartsCharts

Prerequisites

  • A V0 account (Premium or higher for prompt queuing)
  • A Supabase project (free tier works — connect via V0's Connect panel)
  • A list of your stock locations (warehouses, stores, fulfillment centers)
  • Your product catalog with SKU numbers

Build steps

1

Set up the database schema with computed columns

Open V0 and create a new project. Connect Supabase via the Connect panel, then prompt V0 to create the schema with locations, items, stock levels with a PostgreSQL generated column for available quantity, and transfer tables.

prompt.txt
1// Paste this prompt into V0's AI chat:
2// Build a multi-location inventory tracking system. Create a Supabase schema:
3// 1. locations: id (uuid PK), name (text), type (text CHECK IN 'warehouse','retail','fulfillment'), address (text)
4// 2. items: id (uuid PK), sku (text UNIQUE), name (text), category (text), weight_grams (int), image_url (text)
5// 3. stock_levels: id (uuid PK), item_id (uuid FK to items), location_id (uuid FK to locations), quantity (int), reserved (int DEFAULT 0), available (int GENERATED ALWAYS AS quantity - reserved STORED)
6// 4. transfers: id (uuid PK), from_location (uuid FK to locations), to_location (uuid FK to locations), status (text DEFAULT 'pending'), created_by (uuid FK to auth.users), created_at (timestamptz)
7// 5. transfer_items: id (uuid PK), transfer_id (uuid FK to transfers), item_id (uuid FK to items), quantity (int)
8// Add RLS policies and a unique constraint on (item_id, location_id) in stock_levels.
9// Generate SQL migration and TypeScript types.

Pro tip: Use V0's prompt queuing — queue up to 10 prompts while the first one generates. Queue the schema prompt first, then the matrix view and transfer form next.

Expected result: Supabase is connected, all five tables are created with the generated available column and proper foreign keys.

2

Build the cross-location stock matrix

Create the main tracking page that shows a matrix of all items across all locations. Each row is an item, each column group is a location showing quantity, reserved, and available. Use a DataTable with location columns for a spreadsheet-like experience.

prompt.txt
1// Paste this prompt into V0's AI chat:
2// Create an inventory tracking page at app/tracking/page.tsx.
3// Requirements:
4// - Fetch all items with stock_levels joined by location
5// - Display as a shadcn/ui DataTable matrix: first columns are SKU, Item Name, Category
6// - Then for each location, show three sub-columns: Qty, Reserved, Available
7// - Color the Available cell: green if > 10, yellow if 1-10, red if 0
8// - Add a Progress bar in each location column showing stock health (available / max quantity)
9// - Add a Command palette (Cmd+K) for fast item search by SKU or name
10// - Add filter Select dropdowns for category and location type
11// - Summary Cards at top: Total Items, Total Locations, Items Below Threshold, Pending Transfers

Expected result: The tracking page shows a matrix view with color-coded stock levels across all locations, a Command palette for search, and summary cards.

3

Create the transfer workflow with stepper UI

Build a multi-step transfer form using a stepper pattern. Step 1: select source and destination locations. Step 2: search and add items with quantities. Step 3: review and confirm. The confirmation triggers an atomic operation that decrements source and increments destination.

prompt.txt
1// Paste this prompt into V0's AI chat:
2// Create a transfer workflow at app/tracking/transfers/new/page.tsx.
3// Requirements:
4// - Step 1: Select 'From Location' and 'To Location' using shadcn/ui Select dropdowns. Show location type Badge next to each option.
5// - Step 2: Search items with Command, add them to a transfer list with quantity Input for each. Show available stock at the source location next to each item. Validate quantity <= available.
6// - Step 3: Review summary in a Card showing all items, quantities, source, and destination. Confirm Button and Back Button.
7// - Use a Progress bar or step indicators showing Step 1/2/3.
8// - On confirm, POST to /api/transfers with the transfer data.
9// - Show a success Toast with the transfer ID and redirect to the transfers queue.

Expected result: A three-step transfer form guides users through selecting locations, adding items, and confirming. The transfer is created on submission.

4

Build the atomic transfer completion API

Create the API route that completes a transfer by atomically decrementing stock at the source location and incrementing at the destination. This uses a Supabase RPC function with row-level locking to prevent race conditions.

app/api/transfers/[id]/complete/route.ts
1import { createClient } from '@supabase/supabase-js'
2import { NextRequest, NextResponse } from 'next/server'
3
4const supabase = createClient(
5 process.env.SUPABASE_URL!,
6 process.env.SUPABASE_SERVICE_ROLE_KEY!
7)
8
9export async function POST(
10 req: NextRequest,
11 { params }: { params: Promise<{ id: string }> }
12) {
13 const { id } = await params
14
15 const { data, error } = await supabase.rpc('complete_transfer', {
16 p_transfer_id: id,
17 })
18
19 if (error) {
20 const status = error.message.includes('Insufficient') ? 409 : 500
21 return NextResponse.json({ error: error.message }, { status })
22 }
23
24 return NextResponse.json({ success: true, data })
25}

Pro tip: Always use Supabase RPC for multi-table writes. The complete_transfer function decrements source, increments destination, and updates transfer status — all in one transaction. If source stock is insufficient, it rolls back everything.

Expected result: Completing a transfer atomically moves stock between locations. If source stock is insufficient, the API returns a 409 Conflict error.

5

Add stock trend charts with Recharts

Build an analytics section showing stock-over-time trends per item and location. Use Recharts AreaChart wrapped in a client component to display historical data with interactive tooltips.

components/stock-trend-chart.tsx
1'use client'
2
3import { AreaChart, Area, XAxis, YAxis, CartesianGrid, Tooltip, ResponsiveContainer } from 'recharts'
4import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
5import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs'
6
7interface StockDataPoint {
8 date: string
9 quantity: number
10 reserved: number
11 available: number
12}
13
14export function StockTrendChart({ data }: { data: StockDataPoint[] }) {
15 return (
16 <Card>
17 <CardHeader>
18 <CardTitle>Stock Trend</CardTitle>
19 </CardHeader>
20 <CardContent>
21 <Tabs defaultValue="7d">
22 <TabsList>
23 <TabsTrigger value="7d">7 Days</TabsTrigger>
24 <TabsTrigger value="30d">30 Days</TabsTrigger>
25 <TabsTrigger value="90d">90 Days</TabsTrigger>
26 </TabsList>
27 <TabsContent value="7d">
28 <ResponsiveContainer width="100%" height={300}>
29 <AreaChart data={data}>
30 <CartesianGrid strokeDasharray="3 3" />
31 <XAxis dataKey="date" />
32 <YAxis />
33 <Tooltip />
34 <Area type="monotone" dataKey="available" stroke="#22c55e" fill="#22c55e" fillOpacity={0.2} />
35 <Area type="monotone" dataKey="reserved" stroke="#eab308" fill="#eab308" fillOpacity={0.2} />
36 </AreaChart>
37 </ResponsiveContainer>
38 </TabsContent>
39 </Tabs>
40 </CardContent>
41 </Card>
42 )
43}

Expected result: The analytics section shows interactive area charts with stock trends over time, with tabs for different time ranges.

6

Configure RLS policies and deploy

Set up Row Level Security policies scoped to the organization to prevent cross-tenant data leaks. Then configure environment variables and publish to production.

supabase/migrations/rls_policies.sql
1-- Run this in Supabase SQL Editor
2-- Add organization_id to all tables for multi-tenant isolation
3ALTER TABLE locations ADD COLUMN org_id uuid NOT NULL;
4ALTER TABLE items ADD COLUMN org_id uuid NOT NULL;
5ALTER TABLE stock_levels ADD COLUMN org_id uuid NOT NULL;
6ALTER TABLE transfers ADD COLUMN org_id uuid NOT NULL;
7
8-- RLS policy: users can only access data in their organization
9CREATE POLICY "Users see own org locations" ON locations
10 FOR SELECT USING (
11 org_id IN (
12 SELECT org_id FROM user_orgs WHERE user_id = auth.uid()
13 )
14 );
15
16CREATE POLICY "Users see own org items" ON items
17 FOR SELECT USING (
18 org_id IN (
19 SELECT org_id FROM user_orgs WHERE user_id = auth.uid()
20 )
21 );

Expected result: RLS policies are active. Users can only see inventory data belonging to their organization. The app is published to Vercel.

Complete code

app/api/transfers/[id]/complete/route.ts
1import { createClient } from '@supabase/supabase-js'
2import { NextRequest, NextResponse } from 'next/server'
3
4const supabase = createClient(
5 process.env.SUPABASE_URL!,
6 process.env.SUPABASE_SERVICE_ROLE_KEY!
7)
8
9export async function POST(
10 req: NextRequest,
11 { params }: { params: Promise<{ id: string }> }
12) {
13 const { id } = await params
14
15 // Verify transfer exists and is pending
16 const { data: transfer, error: fetchError } = await supabase
17 .from('transfers')
18 .select('*, transfer_items(*, items(name, sku))')
19 .eq('id', id)
20 .eq('status', 'pending')
21 .single()
22
23 if (fetchError || !transfer) {
24 return NextResponse.json(
25 { error: 'Transfer not found or already completed' },
26 { status: 404 }
27 )
28 }
29
30 // Execute atomic transfer via RPC
31 const { data, error } = await supabase.rpc('complete_transfer', {
32 p_transfer_id: id,
33 })
34
35 if (error) {
36 const status = error.message.includes('Insufficient') ? 409 : 500
37 return NextResponse.json({ error: error.message }, { status })
38 }
39
40 return NextResponse.json({
41 success: true,
42 transfer_id: id,
43 items_transferred: transfer.transfer_items.length,
44 })
45}
46
47export async function GET(
48 req: NextRequest,
49 { params }: { params: Promise<{ id: string }> }
50) {
51 const { id } = await params
52
53 const { data, error } = await supabase
54 .from('transfers')
55 .select(`
56 *,
57 from_loc:locations!from_location(name, type),
58 to_loc:locations!to_location(name, type),
59 transfer_items(*, items(name, sku))
60 `)
61 .eq('id', id)
62 .single()
63
64 if (error) {
65 return NextResponse.json({ error: error.message }, { status: 500 })
66 }
67
68 return NextResponse.json({ data })
69}

Customization ideas

Demand forecasting with moving averages

Calculate 7-day and 30-day moving averages of stock depletion rates to predict when items will run out and suggest reorder quantities.

CSV import and export

Add bulk import of inventory counts from CSV files and export the current stock matrix to CSV for offline analysis or sharing with suppliers.

Low-stock email alerts

Set up a Vercel Cron Job that checks stock levels daily and sends email notifications via Resend when items fall below their minimum threshold at any location.

Barcode and QR code scanning

Integrate a camera-based barcode scanner using html5-qrcode in a client component for quick item lookups during physical stock counts.

Integration with shipping carriers

Connect to ShipStation or EasyPost APIs to automatically create shipments when transfers between locations are completed.

Common pitfalls

Pitfall: Not using PostgreSQL generated columns for computed fields like available quantity

How to avoid: Use a PostgreSQL GENERATED ALWAYS AS column: available int GENERATED ALWAYS AS (quantity - reserved) STORED. The database keeps it in sync automatically.

Pitfall: Running transfer operations as two separate UPDATE queries

How to avoid: Use a Supabase RPC function that performs both operations in a single transaction with FOR UPDATE row locking. If any step fails, everything rolls back.

Pitfall: Using NEXT_PUBLIC_ prefix for SUPABASE_SERVICE_ROLE_KEY

How to avoid: Store SUPABASE_SERVICE_ROLE_KEY in V0's Vars tab without any prefix. Use it only in API routes. Use NEXT_PUBLIC_SUPABASE_ANON_KEY for client-side queries protected by RLS.

Pitfall: Forgetting to add organization-scoped RLS policies

How to avoid: Add an org_id column to every table and create RLS policies that check the user's organization membership before allowing any read or write operation.

Best practices

  • Use PostgreSQL generated columns for computed values like available stock — the database handles consistency automatically
  • Scope all RLS policies to organization_id to ensure multi-tenant data isolation from day one
  • Use V0's prompt queuing to build the matrix view, transfer form, and analytics chart in sequence without waiting between prompts
  • Wrap Recharts components in 'use client' components and load them with next/dynamic if they are heavy — Server Components handle the data fetching
  • Use Supavisor connection pooling string from the Supabase dashboard for all serverless API routes to avoid connection exhaustion
  • Add a unique constraint on (item_id, location_id) in stock_levels to prevent duplicate rows and ensure upserts work correctly
  • Use V0's Design Mode (Option+D) to adjust the stock matrix column widths and chart colors without spending credits
  • Store transfer history with full item details (not just IDs) so the audit trail is readable even if items are later deleted

AI prompts to try

Copy these prompts to build this project faster.

ChatGPT Prompt

I'm building a multi-location inventory tracking platform with Next.js App Router and Supabase. I need a PostgreSQL function called complete_transfer that takes a transfer_id, loops through its transfer_items, decrements stock at the source location, increments at the destination, and updates the transfer status to 'completed' — all in one transaction with row-level locking. If any item has insufficient stock at the source, roll back everything and raise an exception. Please write the SQL function.

Build Prompt

Create a real-time stock matrix dashboard that subscribes to Supabase Realtime changes on the stock_levels table. When any stock level changes (from a transfer, receipt, or adjustment), the matrix should update the specific cell without a full page reload. Use Supabase's .on('postgres_changes') in a useEffect hook inside a 'use client' component, and handle cleanup on unmount.

Frequently asked questions

How does the platform handle stock transfers between locations?

Transfers use a three-step workflow: select source and destination, add items with quantities, then confirm. On confirmation, a Supabase RPC function atomically decrements stock at the source and increments at the destination in a single transaction. If source stock is insufficient, the entire operation rolls back.

What is a PostgreSQL generated column and why use it?

A generated column is computed automatically by the database from other columns. The available column (quantity - reserved) updates instantly whenever quantity or reserved changes. This is more reliable than calculating it in your app code because the database guarantees consistency.

Can I track stock across different types of locations like warehouses and Amazon FBA?

Yes. The locations table has a type field (warehouse, retail, fulfillment) that lets you categorize each location. The stock matrix displays all location types with their quantities, and you can filter by type to focus on specific channels.

Do I need a paid V0 plan?

Premium ($20/month) is recommended. The tracking platform has multiple complex pages (matrix view, transfer workflow, analytics), and you will benefit from V0's prompt queuing to build them in sequence. The free tier's limited credits may not be enough.

How do I prevent users from one company seeing another company's data?

Add an org_id column to every table and create Supabase Row Level Security policies that check the user's organization membership. The anon key with RLS ensures that queries automatically filter to the user's organization.

How do I deploy the tracking platform?

Click Share in V0, then Publish to Production. Your app deploys to Vercel in 30-60 seconds. For team collaboration, use the Git panel to connect to GitHub — V0 creates a branch, and your team reviews the PR before merging to main.

Can RapidDev help build a custom inventory tracking platform?

Yes. RapidDev has built over 600 apps including multi-location inventory systems with barcode scanning, demand forecasting, and ERP integrations. Book a free consultation to scope your project and get a production-ready platform.

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