Date: February 2026
Project: Upgrade Shopify Integration from Old API to New API
Risk Level: High - Requires Careful Testing
Estimated Timeline: 4-6 weeks
We're upgrading how our system talks to Shopify. Think of it like upgrading from an old phone system to a new one - the conversations are the same, but we need to learn the new way to dial and connect.
Current System: Uses Shopify's old REST API (from 2021)
New System: Uses Shopify's modern GraphQL API (2026 version)
Shopify announced that their old API (REST) is now "legacy" - meaning it's outdated and could stop working in the future. We need to upgrade to stay current.
The new system will:
- Make 50-70% fewer calls to Shopify (faster operations)
- Get more information in a single request
- Reduce delays and improve efficiency
Shopify's new features and improvements will only work with the modern API. Staying on the old system means we'll miss out on improvements.
We've built the foundation:
- Database is ready for the new system
- Security/authentication updated
- Basic operations converted:
- Deleting products
- Looking up products
- Updating prices
¶ ⏳ Still To Do (60% Remaining)
The complex operations still need work:
- Creating new products (the biggest job - very complex)
- Managing product images
- Inventory location tracking
- Order processing
We CANNOT test this on the live production system without serious risk:
❌ Testing on Live = Potential Disasters:
- Could accidentally delete real products
- Might create duplicate products customers see
- Could mess up pricing on live products
- Risk corrupting product data that's already working
- No way to practice or experiment safely
We MUST have a separate UAT (User Acceptance Testing) environment:
✅ UAT Environment Requirements:
-
Separate Shopify Test Store
- A completely separate Shopify account (not production)
- Has fake/test products we can destroy without consequences
- Isolated from customer-facing systems
-
Separate Database Copy
- Clone of production data for testing
- Changes here don't affect real customer data
- Can be reset/wiped if something goes wrong
-
Separate Application Instance
- Test version of our code running separately
- Can crash or malfunction without affecting customers
- Safe place to make mistakes and learn
Without UAT:
- 🔴 Risk: Could break live product listings
- 🔴 Risk: Might corrupt customer orders
- 🔴 Risk: No rollback if something goes wrong
- 🔴 Risk: Customers see errors/test data
- 🔴 Risk: Business downtime while fixing issues
With UAT:
- ✅ Safe: Break things without customer impact
- ✅ Practice: Learn the new system safely
- ✅ Confidence: Prove it works before going live
- ✅ Rollback: Keep production untouched until certain
- ✅ Quality: Find and fix bugs in isolation
What: Set up test environment
Where: New UAT environment
Risk: None - no production impact
Activities:
- Create Shopify test store
- Clone production database to test database
- Deploy code to UAT environment
- Obtain test API credentials from Shopify
Success Criteria:
- UAT environment is running
- Test store has sample products
- Team can access and test safely
What: Finish converting remaining operations
Where: Development computers + UAT testing
Risk: Low - testing in isolation
Activities:
- Complete product creation migration
- Complete image management migration
- Complete inventory location migration
- Test each piece as we build it
Success Criteria:
- All operations work in UAT
- No errors in test logs
- Test products created successfully
What: Rigorous testing of all scenarios
Where: UAT environment ONLY
Risk: None - production not touched
Critical Tests:
-
Product Management
- Create products with single variants ✓
- Create products with multiple options (sizes, colors) ✓
- Update product prices ✓
- Update product descriptions ✓
- Upload and manage product images ✓
- Delete products ✓
-
Complex Scenarios
- Products with warranty extensions ✓
- Furniture with multiple size/color options ✓
- Bed products with width and length variations ✓
- Products with promotional pricing ✓
-
Data Integrity
- Verify database updates correctly ✓
- Confirm Shopify matches our database ✓
- Check no data loss or corruption ✓
-
Error Handling
- Test with invalid data ✓
- Verify error messages are clear ✓
- Confirm system recovers gracefully ✓
-
Performance
- Measure API call reduction ✓
- Verify speed improvements ✓
- Monitor rate limiting behavior ✓
Success Criteria:
- All tests pass in UAT
- No data corruption
- Performance meets or exceeds old system
- Team signs off that system works
What: Final verification before touching production
Where: UAT environment review
Risk: None - still testing
Checklist:
Go/No-Go Decision:
- If ALL checkboxes ✓ → Proceed to production
- If ANY checkbox ✗ → Stay in UAT, fix issues
What: Apply changes to live system
Where: Production (with extreme caution)
Risk: Managed with rollback plan
Step-by-Step Process:
Before Migration:
- Create full production database backup
- Document current system state
- Notify team of maintenance window
- Have rollback plan ready
Migration Steps:
-
Database Update (5 minutes)
- Run SQL migration script
- Add Shopify access token
- Verify database changes
-
Code Deployment (10 minutes)
- Deploy new code to production
- Keep old code available for rollback
- Verify deployment successful
-
Smoke Testing (30 minutes)
- Test ONE product deletion (non-critical product)
- Test ONE product price update
- Test ONE product lookup
- Verify database updates
-
Gradual Rollout (2 hours)
- Enable for 10% of operations
- Monitor for errors
- Increase to 50% if stable
- Monitor for errors
- Increase to 100% if stable
-
Monitoring (24 hours)
- Watch error logs continuously
- Monitor Shopify API responses
- Verify customer experience unchanged
- Check data synchronization
Rollback Trigger:
If we see:
- ❌ Errors in product creation
- ❌ Data corruption
- ❌ Customer-facing issues
- ❌ Performance degradation
Then IMMEDIATELY:
- Revert to old code
- Restore database backup
- Investigate issues in UAT
- Plan retry after fixes
| Risk |
Impact |
Likelihood |
Mitigation |
| Delete live products |
CRITICAL |
High |
MUST have UAT |
| Corrupt product data |
CRITICAL |
High |
MUST have UAT |
| Break customer experience |
CRITICAL |
Medium |
MUST have UAT |
| Cannot rollback |
CRITICAL |
High |
MUST have UAT |
| Risk |
Impact |
Likelihood |
Mitigation |
| UAT test failures |
Low |
Medium |
Fix in UAT, retest |
| Migration takes longer |
Medium |
Low |
Adjust timeline |
| Learning curve |
Low |
High |
Practice in UAT |
- Time: 1 week to set up properly
- Resources: Separate Shopify test store (minimal cost)
- Effort: Database cloning and environment setup
- Safety: Zero risk to live customers
- Confidence: Prove system works before production
- Quality: Find bugs before they affect business
- Training: Team practices in safe environment
- Speed: Faster fixes when found in testing vs production
- Potential Revenue Loss: If live products deleted/corrupted
- Customer Trust: If customers see errors or wrong prices
- Emergency Fixes: 10x more expensive to fix in production
- Stress: Team working under pressure with live issues
- Rollback Complexity: Much harder to undo production problems
Conclusion: UAT pays for itself by preventing one production incident.
- ✓ 50-70% reduction in API calls
- ✓ Zero data loss or corruption
- ✓ All operations work correctly
- ✓ Error rate < 0.1%
- ✓ No customer-facing disruptions
- ✓ No increase in support tickets
- ✓ Product updates happen faster
- ✓ System more reliable
- ✓ Team confident in new system
- ✓ Documentation complete
- ✓ Able to troubleshoot issues
- ✓ Faster to add new features
Audience: Management & Business Stakeholders
Message: "We're upgrading our Shopify integration. No customer impact expected. Testing thoroughly in UAT first."
Audience: Technical Team
Message: "Testing in progress. Report any issues immediately. Do not touch production."
Audience: All Staff
Message: "Shopify upgrade scheduled for [DATE]. Brief maintenance window expected. Customer-facing systems should not be affected."
Audience: All Staff
Message: "Shopify upgrade complete. Monitor for [24 hours]. Report any unusual behavior immediately."
Q: Can't we just test on production carefully?
A: No. Even "careful" testing on production risks:
- Accidentally deleting real products
- Creating duplicate test products customers see
- Corrupting live data
- No safe way to practice and learn
- If something breaks, customers are affected immediately
Q: How much does a UAT environment cost?
A: Minimal:
- Shopify test store: Free or very low cost
- Database copy: Uses existing infrastructure
- Time to set up: 1 week
- Cost of one production incident: Much, much higher
Q: Can we skip UAT if we're careful?
A: Absolutely not. This is like saying "Can we do brain surgery without practicing first if we're careful?" The stakes are too high.
Q: What if we find problems in UAT?
A: Perfect! That's exactly why we have UAT. We fix problems there, retest, and only go to production when everything works.
Q: How long will this take?
A: With proper UAT:
- 4-6 weeks total
- Week 1: Set up UAT
- Weeks 2-3: Development
- Week 4: UAT testing
- Week 5: Pre-production prep
- Week 6: Production migration
Without UAT (not recommended):
- Unknown - could be days if lucky, or weeks/months if we break production
Q: What happens if we go live and something breaks?
A: With UAT testing, the risk is minimal. But we have:
- Full database backup
- Rollback plan to old system
- 24-hour intensive monitoring
- Can revert in minutes if needed
This migration plan requires approval from:
Technical Approval:
Business Approval:
UAT Environment Approval:
Go-Live Approval:
We're upgrading our Shopify connection to a newer, faster, more reliable system.
The Challenge:
This is complex and risky if done wrong.
The Solution:
Use a UAT (test) environment to practice and perfect before touching production.
The Non-Negotiable:
We MUST have a separate test environment. Testing on production is not acceptable and risks serious business disruption.
The Timeline:
6 weeks with proper testing, vs unknown time fixing production disasters.
The Outcome:
A better, faster, future-proof Shopify integration with zero customer impact.
Questions about this plan?
Contact: Technical Team Lead
Concerns about timeline?
Contact: Project Manager
Need business justification for UAT?
Review: "Cost-Benefit Analysis" section above
Ready to approve?
Sign off in: "Approval & Sign-Off" section above
Document Version: 1.0
Last Updated: February 7, 2026
Next Review: After UAT Environment Setup