Supabase Upgrade Migration

Instructions

Step 1: Audit Versions, Scan Usage, and Review Breaking Changes

Check every installed Supabase package and find all import sites in the codebase.

# Check current SDK version
npm list @supabase/supabase-js

# Check CLI version
supabase --version

# Check Python SDK version
pip show supabase | grep Version

# Find all JS/TS Supabase imports
grep -rn "from '@supabase/supabase-js'" --include="*.ts" --include="*.tsx" --include="*.js" src/ lib/ app/ 2>/dev/null
grep -rn "createClient" --include="*.ts" --include="*.tsx" --include="*.js" src/ lib/ app/ 2>/dev/null

# Find all Python Supabase imports
grep -rn "from supabase" --include="*.py" src/ app/ 2>/dev/null

supabase-js v1 → v2 breaking changes:

Realtime v2 migration detail:

// v1 realtime
supabase
  .from('messages')
  .on('INSERT', (payload) => console.log(payload.new))
  .subscribe()

// v2 realtime — channel-based API
supabase
  .channel('messages-insert')
  .on('postgres_changes', { event: 'INSERT', schema: 'public', table: 'messages' },
    (payload) => console.log(payload.new))
  .subscribe()

Step 2: Run the Upgrade and Apply Code Migrations

Create a branch, install new packages, and transform code to match v2 APIs.

# Create upgrade branch
git checkout -b upgrade-supabase-sdk

# Upgrade JS/TS SDK
npm install @supabase/supabase-js@latest

# Upgrade SSR helper (if used with Next.js/SvelteKit/Nuxt)
npm install @supabase/ssr@latest

# Upgrade CLI
npm install -g supabase@latest

# Upgrade Python SDK
pip install --upgrade supabase

# Regenerate TypeScript types from linked project
npx supabase gen types typescript --linked > lib/database.types.ts

# Generate a database migration if schema drifted
npx supabase db diff --use-migra -f upgrade_check

Apply auth code migrations:

// BEFORE (v1 auth patterns)
const session = supabase.auth.session()
const user = supabase.auth.user()
const { error } = await supabase.auth.signIn({ email, password })
const { data: subscription } = supabase.auth.onAuthStateChange(callback)

// AFTER (v2 auth patterns)
const { data: { session } } = await supabase.auth.getSession()
const { data: { user } } = await supabase.auth.getUser()
const { error } = await supabase.auth.signInWithPassword({ email, password })
const { data: { subscription } } = supabase.auth.onAuthStateChange(callback)

Apply error handling migration:

// BEFORE (v1 — string matching)
if (error.message.includes('not found')) { ... }

// AFTER (v2 — structured error codes)
if (error.code === 'PGRST116') { ... }  // "not found" → PGRST116

Step 3: Verify, Test, and Prepare Rollback

# Type check (catches 90% of migration issues)
npx tsc --noEmit

# Run test suite
npm test

# Python tests
python -m pytest tests/ -v

# Manual smoke test critical auth flows:
# 1. Sign up → confirm email → sign in with password
# 2. OAuth sign in → callback handling
# 3. Password reset → email → reset form
# 4. Session refresh across page navigations
# 5. Realtime subscription connect/disconnect
# 6. Storage upload/download round-trip

Rollback procedure (if upgrade causes issues):

# Option A: Pin to previous version
npm install @supabase/supabase-js@<previous-version>
pip install supabase==<previous-version>

# Option B: Revert the branch
git stash && git checkout main

Output

• @supabase/supabase-js upgraded to latest version with npm list confirmation
• All supabase.auth.signIn() calls migrated to signInWithPassword / signInWithOAuth / signInWithOtp
• Sync auth methods (session(), user()) replaced with async getSession() / getUser()
• Realtime subscriptions migrated from .on() to channel-based API
• data/error destructuring updated where return shapes changed
• TypeScript types regenerated from current schema
• Test suite passing, type checking clean
• Rollback branch or version pin documented

Error Handling

Examples

Full v1 → v2 auth migration (Next.js):

// lib/supabase.ts — client initialization (unchanged API)
import { createClient } from '@supabase/supabase-js'
import type { Database } from './database.types'

export const supabase = createClient<Database>(
  process.env.NEXT_PUBLIC_SUPABASE_URL!,
  process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!
)

// app/login/page.tsx — v2 auth flow
export async function login(email: string, password: string) {
  const { data, error } = await supabase.auth.signInWithPassword({
    email,
    password,
  })
  if (error) {
    // v2: use error.code instead of parsing error.message
    if (error.code === 'invalid_credentials') {
      return { success: false, message: 'Invalid email or password' }
    }
    throw error
  }
  return { success: true, session: data.session }
}

// hooks/useAuth.ts — v2 session listener
import { useEffect, useState } from 'react'
import { supabase } from '@/lib/supabase'
import type { Session } from '@supabase/supabase-js'

export function useAuth() {
  const [session, setSession] = useState<Session | null>(null)

  useEffect(() => {
    // v2: getSession is async, returns nested { data: { session } }
    supabase.auth.getSession().then(({ data: { session } }) => {
      setSession(session)
    })

    // v2: subscription nested one level deeper
    const { data: { subscription } } = supabase.auth.onAuthStateChange(
      (_event, session) => setSession(session)
    )

    return () => subscription.unsubscribe()
  }, [])

  return session
}

Python SDK upgrade:

# Before (supabase-py < 2.0)
from supabase import create_client
supabase = create_client(url, key)
data = supabase.table("users").select("*").execute()
users = data["data"]

# After (supabase-py >= 2.0)
from supabase import create_client, Client