Fix: "new row violates row-level security policy" in Supabase (it's not what you think)
If you've shipped anything on Supabase, you've hit this: new row violates row-level security policy for table "notes" ``` Your first instinct is pa…
Latest News
⚑ Report a ProblemTech news from the best sources
All topics
- игры
AI
Gear
News
Tech
agents
ai
api
architecture
automation
beginners
career
claude
devchallenge
devops
javascript
llm
machinelearning
mcp
opensource
performance
productivity
programming
python
react
security
showdev
tutorial
typescript
webdev
Your RAG Eval Isn't Flaky. Your Retrieval Is Non-Deterministic.
Same query. Same documents. Same model. And the RAG eval can still hand back a different Recall@8. Not because the model is flaky. Because of an ORDER…
MinIO, MongoDB, PostgreSQL для хранения 25 лет истории стоимости акций
💾 MinIO, MongoDB, PostgreSQL для хранения 25 лет истории стоимости акций Когда строишь эмулятор для проверки торговой стратегии 20 акций на 25 лет ист…
Capturing, Streaming, Storing, and Visualizing Crypto Market Data in Real Time with PostgreSQL, Debezium, Kafka, JDBC & Grafana
In the fast-moving world of cryptocurrency, market data changes every second — prices fluctuate, trades execute, and volumes shift continuously. Captu…
The blueprint: an HTML-to-PDF API on Postgres, Chromium, and not much else
PDF generation in 2026 is glued together from Puppeteer, LiquidJS, and S3. What's not solved by the glue is the production shape around it: Documents …
# Why We Built DRM: Stopping Production Incidents Caused by Manual Database Deployments *By Alexey Levin & Eli Shohat, co-founders of D-Band* ---
Why We Built DRM: Stopping Production Incidents Caused by Manual Database Deployments By Alexey Levin & Eli Shohat, co-founders of D-Band Between …
NGB Platform v1.3.1: CRM Demo Built with NuGet and npm Packages
NGB Platform v1.3.1 is released. This release is an important milestone for the project because it shows something I wanted to prove from the beginnin…
I built a Stack Overflow for gamers as a solo dev — here’s the stack and why
Most gaming help lives in three bad places: a Reddit thread that’s archived before you find it, a Discord message that scrolled into the void, or a Yo…
Postgres community events. Не пора ли начать использовать возможности цифровизации?
Я участвую во всевозможных конференциях и митапах с 2004 года. И сейчас, как и в эпоху, когда кнопочная Nokia давала людям первый, совсем ещё примитив…
Stop DB Crashes: Read/Write Separation in Laravel 🛡️
The Reporting Traffic Jam As your B2B SaaS platform at Smart Tech Devs scales, a dangerous database bottleneck emerges between your standard users and…
Four Ways a Refresh Token Request Fails — Only One Means Trouble
A refresh token exists for one reason: exchange itself for a new access token, once, and then stop being useful. Everything about a good implementatio…
Generate Student Reports in Rust with HTML Templates and PDF Export
What if student report cards were generated like web pages first, and only then exported as PDFs? The latest post on Techn0tz explores that workflow i…
Every table you create becomes an instant REST + GraphQL API
I keep rebuilding the same backend. Postgres, then auth, then a little CRUD API on top, then a cache once it gets slow, then websockets when I want li…
Why I Chose Neon (dev.to Database Partner) for My AI Routing Platform
When Neon became the official database partner of DEV Community, I was already a user. But the partnership made me look closer at why I chose Neon — a…
“PostgreSQL resolves uniqueness through heap tuple visibility”
I recently commented on Jonathan Lewis’s blog, Savepoint Funny , where I compared how PostgreSQL handles uniqueness differently: “PostgreSQL resolves …
Postgres in Rust: Is This The Future For Your Next.js SaaS?
Okay, so you know how we're all constantly chasing that elusive perfect stack? My usual go-to involves Next.js, TypeScript, Supabase for the backend h…
Postgres vs ClickHouse? I use both. 4 tricks from the split.
TL;DR. My uptime monitor keeps config and incidents in Postgres and check results in ClickHouse. The split is one rule: does a row ever change? Config…
Multi-tenant SaaS architecture patterns
Multi-tenancy is the decision that quietly shapes your entire SaaS backend. Get it right and you scale smoothly to thousands of accounts. Get it wrong…
Database indexing explained
Almost every "the database is slow" complaint we investigate comes down to a missing or misused index. Indexing is the highest-leverage performance sk…
TMP Postgresso #5 (90)
Сессионные вычислители — залог успеха аналитики будущего Всем привет, меня зовут Николай Голов . azathot Всю свою профессиональную жизнь я строю…
Why I chose PGMQ over Redis for IoT sensor ingestion
In my last post, I introduced CultivatorsLedger — a local-first cultivation telemetry platform built on Next.js, PostgreSQL, and Docker. One of the fi…
What happens when a PostgreSQL backend crashes?
Your connection to PostgreSQL is handled by a dedicated backend process. If that process crashes, you might think only your session is affected. Howev…
FOR UPDATE SKIP LOCKED: the Postgres feature that saved my digital cloakroom
Last year I watched a nightclub cloakroom melt down at 3am: two hundred people waving paper tickets, three staff members, and a lost-ticket dispute bl…
PostgreSQL Benchmark: AWS RDS vs Hostim vs Self-Hosted on Hetzner (2026)
Short answer first: at the same size (2 vCPU / 4 GB, PostgreSQL 16), Hostim had the fastest writes , about 2.5× the write throughput of AWS RDS db.t4g…
[Перевод] Проектирование POSTGRES: как задумывалась популярная СУБД
8 июля у PostgreSQL юбилей — ей исполняется 30 лет. В 1996 году Марк Фурнье из компании Networking Services предоставил первый внешний сервер для разр…
Как я решал задачу сортировки зашифрованных строк
Некоторое время назад я столкнулся с задачей сортировки зашифрованных строковых значений в базе данных. Сначала я предполагал, что существует какой-то…
Your Postgres already knows why it's slow — you just have to ask it
Keeping our database fast at Atlas was part of my job — alongside writing code and shipping features. And a big chunk of that job was unglamorous: cha…
[Перевод] Ограничения целостности с отложенной проверкой в PostgreSQL
По умолчанию, ограничения целостности в PostgreSQL проверяются немедленно, сразу после обновления каждой строки, что может быть неоднозначным при обно…
3 Supabase security incidents, one shared root cause: SECURITY DEFINER inherits EXECUTE TO PUBLIC
Episode 1/4 of the mini-series The week Supabase lied to me 4 times . The three following episodes cover a mutation silently swallowed by the SDK [CAN…
Building Vidiflow: A Production-Grade Video Downloader Backend in TypeScript
I Built a Production-Ready Video Downloader Backend in TypeScript — Here's What I Learned I just completed V2 of Vidiflow , a production-ready backend…