Realistic synthetic test data generation for developers, analysts, QA teams. Generate customer, product, transactional data, & more. No real data. No headaches.
@pasinduIshan3 FK consistency across related tables is usually the hard part with generators like this. Does it handle entity relationships, or is that left to the user?
@Nipsuli Smart pattern. Gets tricky when you need edge cases e2e workflows don't naturally produce — nulls, boundary values, FK violations across tables.
@supabase Live queries and optimistic mutations will surface bad data modeling fast. Seeding with realistic data before you demo saves a lot of debug time.
@mjovanovictech This holds for balanced distributions. Add heavy column skew and optimizer estimates start misfiring. That's where Medium advice really falls apart.
@natnaelkedir Async clicking for real when the data shows up and the UI responds. Only gotcha with random user APIs: great for happy-path testing, bad for edge cases (long names, nulls, unicode). Worth adding a few manual fixtures for the weird stuff as your app gets more complex.
@thebedigupta Solid move. Once test data lives in spec blocks, the next unlock is generating it for different states: empty, populated, edge cases. Decoupling is step one; schema-driven generation is step two.
@hridoyreh 26. A proper test data generator. Reads your schema and spits out FK-consistent seed rows. Nobody thinks about this until they're trying to seed a prod-scale schema at midnight with hardcoded [email protected].
@smitjoshi28 Synthetic wins for volume on demand, cross-border staging, and edge cases real data doesn't cover.
Where it fails: relational consistency. Generate users and orders independently and the foreign keys won't match. Schema-aware generation fixes that.
Your mock data lied to you.
Worked perfectly in tests. Null never appeared. Email was always valid.
Production disagreed.
The fix isn't better mocks — it's data that reflects how real users actually fill in forms.
@dharmvir_ One gap in this list: test data seeding. There's barely any OSS tooling for generating realistic, FK-consistent rows for your dev DB. Coolify handles infra beautifully but the test data problem is just unsolved.
Your test suite is green. Prod still breaks.
Most teams seed with one clean row 500x. Real users show up as O'Brien-Nunez, NULL phones, +44 numbers, -$50 refunds.
Clean fixtures test the happy path. Bugs live in the tails.
@TheWebTech The how-did-you-make-the-demo-data question never goes away. What most miss: demo data has to look like the prospect's own business, not generic. Coherent names, plausible deal sizes, relationships that hold when someone clicks in. That is what makes a demo land.
@crossiBuilds Realistic staging data is the task everyone postpones, because hand-writing it is miserable. Generating schema-aware fake data (real-looking names, valid relationships, no real PII) gets you a seeded staging env without the slog.
@mjovanovictech The data shape bites you too. In-memory DBs let clean rows pass, then real Postgres hits a unicode name, a NULL where you assumed NOT NULL, or a value that trips a CHECK constraint. Real PG plus realistic data catches both.
Built Generate-Data so you can spin up that messy, realistic dataset in seconds instead of hand-faking it. Plain-English schema in, valid data out, zero real PII. https://t.co/xoQdwkNlqL
Most teams seed their dev DB with one clean row 500x: Jane Smith, [email protected], $100.00.
Then prod sends O'Brien-Nunez, a NULL phone, a +44 number, a -$50 refund, and it all falls over.
Clean fixtures test the happy path. Bugs live in the tails.
New drop: AI schema creation on https://t.co/xoQdwkNlqL
Describe your dataset in plain English. We build the schema. You get the data.
No JSON. No config. Just tell it what you need.
→ https://t.co/xoQdwkNlqL
#devtools#syntheticdata#buildinpublic
Traditional AI training often suffers from synthetic data decay where AI models learn from other AI generated content. Perceptron solves this by injecting actual human activity into the data layer
@PerceptronNTWK
@AlexanderKalian Synthetic data. It's already being done with code. And once we fully solve code - with autoformalization and automated code compilation proofs - it will open up a whole new level of intelligence for us.
Synthetic data is practically a dead end, aside from limited and specific use-cases, as it amplifies errors and hallucinations downstream.
Code is perhaps a specific situation where it may work OK, due to local ability to rapidly verify, score etc. - but it becomes practically unfeasible for the natural sciences, social sciences, economic sciences etc. - where expensive and time-consuming real-world verification is critical.