Database Seed Data Not Loaded on Startup
Seed data script that populates initial test data in development is not executing. The database starts empty, causing tests and manual testing to fail. This might be a timing issue where seed data attempts to load before migrations complete.
Seed data loading is typically optional and failures are silently ignored, making this hard to debug.
Error Messages You Might See
Common Causes
- Seed data script runs before migrations complete, violating foreign key constraints
- Seed data file not in correct location or not discovered by classpath scanner
- Seed data loader bean not initialized due to missing @Component or configuration
- Seed data script has SQL syntax errors silently caught by exception handler
- Database constraints prevent seed inserts (unique violations, type mismatches)
How to Fix It
Run seed data AFTER migration completion by using @Order or @Depends-On annotations. Add explicit logging to confirm seed data loading starts and finishes. Validate SQL scripts manually before inclusion. Use separate seed files for test vs development environments. Include rollback scripts to easily reset data.
Real developers can help you.
Anthony Akpan
Developer with 8 years of experience building softwares fro startups
Vlad Temian
15+ years shipping production infrastructure for startups. Former CTO at qed.builders (acquired by The Sandbox).
Cursor ambassador and agentic tooling builder.
I've scaled systems, automated deployments, and built observability tools for AI coding workflows. I specialize in taking vibe-coded apps from broken prototype to production-ready: fixing Supabase auth/RLS, Stripe integrations, deployment pipelines, and cleaning up AI-generated spaghetti.
I build tools in this space (agentprobe, claudebin, micode) and understand both sides: how AI generates code and why it breaks.
https://blog.vtemian.com/
Basel Issmail
’m a Senior Full-Stack Developer and Tech Lead with experience designing and building scalable web platforms. I work across the full development lifecycle, from translating business requirements into technical architecture to delivering reliable production systems.
My work focuses on modern web technologies, including TypeScript, Angular, Node.js, and cloud-based architectures. I enjoy solving complex technical problems and helping teams turn product ideas and prototypes into working platforms that can grow and scale.
In addition to development, I often collaborate closely with product managers, business analysts, designers, and QA teams to ensure that solutions align with both technical and business goals.
I enjoy working with startups and product teams where I can contribute both as a hands-on engineer and as a technical partner in designing and delivering impactful software.
Bastien Labelle
Full stack dev w/ 20+ years of experience
Kingsley Omage
Fullstack software engineer passionate about AI Agents, blockchain, LLMs.
Pratik
SWE with 15+ years of experience building and maintaining web apps and extensive BE infrastructure
Franck Plazanet
I am a Strategic Engineering Leader with over 8 years of experience building high-availability enterprise systems and scaling high-performing technical teams. My focus is on bridging the gap between complex technology and business growth.
Core Expertise:
🚀 Leadership: Managing and coaching teams of 15+ engineers, fostering a culture of accountability and continuous improvement.
🏗️ Architecture: Enterprise Core Systems, Multi-system Integration (ERP/API/ETL), and Core Database Structure.
☁️ Cloud & Scale: AWS Expert; architected systems handling 10B+ monthly requests and managing 100k+ SKUs.
📈 Business Impact: Aligning tech strategy with P&L goals to drive $70k+ in monthly recurring revenue.
I thrive on "out-of-the-box" thinking to solve complex technical bottlenecks and am always looking for ways to use automation to improve business productivity.
Daniel Vázquez
Software Engineer with over 10 years of experience on Startups, Government, big tech industry & consulting.
Matthew Butler
Systems Development Engineer @ Amazon Web Services
Jared Hasson
Full time lead founding dev at a cyber security saas startup, with 10 yoe and a bachelor's in CS. Building & debugging software products is what I've spent my time on for forever
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
When should seed data load?
After migrations complete but before tests run. Use @Order annotation to control initialization sequence.
Should seed data load in production?
No. Seed data is only for development/test environments. Gate seed loading behind a configuration flag.
How to validate seed data loaded?
Query counts after startup: SELECT COUNT(*) FROM users. Compare to expected numbers. Add metrics to track seed completion.