Claude Code
database
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
Integrity constraint violation: unique constraint
Foreign key constraint violated
Seed data script completed with 0 rows inserted
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
Prakash Prajapati
I’m a Senior Python Developer specializing in building secure, scalable, and highly available systems. I work primarily with Python, Django, FastAPI, Docker, PostgreSQL, and modern AI tooling such as PydanticAI, focusing on clean architecture, strong design principles, and reliable DevOps practices. I enjoy solving complex engineering problems and designing systems that are maintainable, resilient, and built to scale.
Mehdi Ben Haddou
- Founder of Chessigma (1M+ users) & many small projects
- ex Founding Engineer @Uplane (YC F25)
- ex Software Engineer @Amazon and @Booking.com
Jen Jacobsen
I’m a Full-Stack Developer with over 10 years of experience building modern web and mobile applications. I enjoy working across the full product lifecycle — turning ideas into real, well-built products that are intuitive for users and scalable for businesses.
I particularly enjoy building mobile apps, modern web platforms, and solving complex technical problems in a way that keeps systems clean, reliable, and easy to maintain.
zipking
I am a technologist and product builder dedicated to creating high-impact solutions at the intersection of AI and specialized markets. Currently, I am focused on PropScan (EstateGuard), an AI-driven SaaS platform tailored for the Japanese real estate industry, and exploring the potential of Archify.
As an INFJ-T, I approach development with a "systems-thinking" mindset—balancing technical precision with a deep understanding of user needs. I particularly enjoy the challenge of architecting Vertical AI SaaS and optimizing Small Language Models (SLMs) to solve specific, real-world business problems. Whether I'm in a CTO-level leadership role or hands-on with the code, I thrive on building tools that turn complex data into actionable value.
Omar Faruk
As a Product Engineer at Klasio, I contributed to end-to-end product development, focusing on scalability, performance, and user experience.
My work spanned building and refining core features, developing dynamic website templates, integrating secure and reliable payment gateways, and optimizing the overall system architecture.
I played a key role in creating a scalable and maintainable platform to support educators and learners globally.
I'm enthusiastic about embracing new challenges and making meaningful contributions.
Luca Liberati
I work on monoliths and microservices, backends and frontends, manage K8s clusters and love to design apps architecture
Yovel Cohen
I got a lot of experience in building Long-horizon AI Agents in production, Backend apps that scale to millions of users and frontend knowledge as well.
Costea Adrian
Embedded Engineer specilizing in perception systems. Latest project was a adas camera calibration system.
Sage Fulcher
Hey I'm Sage! Im a Boston area software engineer who grew up in South Florida. Ive worked at a ton of cool places like a telehealth kidney care startup that took part in a billion dollar merger (Cricket health/Interwell health), a boutique design agency where I got to work on a ton of exciting startups including a photography education app, a collegiate Esports league and more (Philosophie), a data analytics as a service startup in Cambridge (MA) as well as at Phillips and MIT Lincoln Lab where I designed and developed novel network security visualizations and analytics. I've been writing code and furiously devoted to using computers to make people’s lives easier for about 17 years. My degree is in making computers make pretty lights and sounds. Outside of work I love hip hop, the Celtics, professional wrestling, magic the gathering, photography, drumming, and guitars (both making and playing them)
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.