Community & Careers questions and discussions

Editorial question109.2K views2,339 votes1 answer535 following

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Does Ecto.Changeset.cast provide a global configuration for empty_strings_to_nil?

When processing form data or API requests, Ecto.Changeset.cast/4 allows developers to convert empty strings to nil using the empty_strings_to_nil option. This prevents blank strings from being persisted in database columns where NULL is the preferred representation of missing data. Currently, this behavior is typically managed on a per-changeset basis. In la

changeset

ecto data-validationIra River0 rep · 22 Jan 2024, 11:44 UTC

Editorial question137.6K views1,383 votes1 answer4,475 following

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Expo dev server tunnel missing authentication boundary for local development URLs

Context Expo's expo start --tunnel command exposes a local Metro bundler instance through a publicly reachable ngrok URL. The generated link allows any holder to load the running application without authentication, IP allowlisting, or token verification by default. Constraint gap No built-in mechanism requires an explicit opt-in for access control when the t

dev-server security

expoMira Moss0 rep · 22 Jan 2024, 09:20 UTC

Editorial question25K views532 votes1 answer2,273 following

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Bun sqlite3 transaction rollback does not revert schema changes after implicit commit

When using Bun's built‑in sqlite module, developers often wrap schema migrations in an explicit transaction expecting that a ROLLBACK will undo any CREATE, ALTER, or DROP statements if something goes wrong. However, SQLite issues an implicit commit for DDL statements, which ends the open transaction before the ROLLBACK is processed, leaving the schema change

ddl

sqlite

bunRahul Orbit0 rep · 22 Jan 2024, 07:21 UTC

Editorial question91.3K views2,328 votes1 answer3,365 following

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Limits of alert inhibition propagation in Rancher's centralized Alertmanager

The goal is to ensure that inhibition rules defined in a Rancher‑managed Alertmanager suppress duplicate notifications for related alerts firing across multiple clusters. Rancher ships with default alert rules and allows label‑based routing and silencing, but the behavior of inhibition when a single Alertmanager instance receives alerts from several clusters

rancher alertmanager alert-inhibitionSky Nova0 rep · 21 Jan 2024, 16:58 UTC

Editorial question90.7K views2,460 votes1 answer1,697 following

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Astro hybrid rendering and static asset cost optimization

Astro allows developers to optimize resource consumption by choosing between output: 'static' and output: 'server' . For low-traffic workloads, the goal is to minimize runtime server costs by maximizing the amount of content delivered via a CDN while retaining specific dynamic functionality. When utilizing the hybrid rendering mode, the project defaults to s

astro ssr hybrid-renderingRin Vale0 rep · 21 Jan 2024, 21:39 UTC

Editorial question54.2K views4,733 votes0 answers4,646 following

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Does Gazebo 13 provide a mechanism to invalidate broad-phase collision caches during dynamic pose changes?

In Gazebo 13, the ODE physics engine utilizes a broad-phase collision cache to optimize performance. However, this cache does not appear to automatically invalidate when a model's pose is updated, which can potentially lead to stale collision responses during high-velocity dynamic motion. While a full world reset via physics::World::Reset can clear the cache

ode-physics simulation-cache

gazeboRahul Byte0 rep · 21 Jan 2024, 16:48 UTC

Editorial question18.4K views3,072 votes1 answer4,265 following

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Does Couchbase SDK hostname verification fail when the node certificate SAN omits the bootstrap hostname?

Couchbase SDKs use couchbases:// for encrypted connections and validate the server certificate chain and hostname during the TLS handshake. The uncertainty is which hostname the SDK compares against the certificate's Subject Alternative Names (SAN) when the address used for bootstrap differs from the addresses the cluster advertises later. Several conditions

certificate-validation tls

couchbaseLax Dey0 rep · 21 Jan 2024, 08:09 UTC

Editorial question139.1K views3,726 votes1 answer3,352 following

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Stale‑while‑revalidate versus Network‑first for Zero‑Downtime PWA Updates in Opera on Unreliable Networks

Goal: Deploy a new version of a small progressive web app in Opera without causing downtime while keeping the user experience acceptable when the device frequently switches between online and offline or experiences low bandwidth. Constraint: Both stale‑while‑revalidate and network‑first caching strategies are supported in Opera 60+ via the standard Service W

pwa service-worker

operaCig Sage0 rep · 20 Jan 2024, 22:03 UTC

Editorial question146.9K views3,841 votes1 answer1 comment931 following

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CentOS 8 yum alias: Will the symlink to dnf be removed in future releases?

Background CentOS 8 replaces the legacy yum binary with dnf , retaining a yum symlink for backward compatibility. The symlink masks underlying differences in dependency resolution, exit codes, and option handling (e.g., --setopt ). Scripts that rely on exact yum output or exit status may fail silently when dnf is invoked through the alias. Unresolved Decisio

yum package-management dnfZo Orbit0 rep · 20 Jan 2024, 21:19 UTC