Fix: Prisma Connection Pool Exhausted — Can't Acquire Connection from Pool
How to fix Prisma connection pool errors — pool size configuration, connection leaks, serverless deployments, singleton pattern, query timeout, and pgBouncer integration.
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Fix: Python asyncio.gather Not Handling Errors — Exceptions Swallowed or All Tasks Cancelled
How to fix asyncio.gather error handling — return_exceptions parameter, partial failures, task cancellation propagation, TaskGroup alternatives, and exception isolation patterns.
Fix: Python Decorator Not Working — Function Signature Lost or Decorator Not Applied
How to fix Python decorator issues — functools.wraps, decorator factories with arguments, class decorators, stacking order, async function decorators, and common pitfalls.
Fix: Python mypy Type Error — Incompatible Types and Missing Annotations
How to fix Python mypy type errors — incompatible types in assignment, missing return type, Optional handling, TypedDict, Protocol, overloads, and common mypy configuration mistakes.
Fix: Pydantic ValidationError — Field Required, Value Not a Valid Type, or Extra Fields
How to fix Pydantic v2 validation errors — required fields, type coercion, model_validator, custom validators, extra fields config, and migrating from Pydantic v1.
Fix: Rails N+1 Query Problem — Too Many Database Queries
How to fix Rails N+1 queries — includes vs joins vs preload vs eager_load, Bullet gem detection, avoiding N+1 in serializers and views, and counter caches.
Fix: React forwardRef Not Working — ref is null or Component Not Exposing Methods
How to fix React forwardRef issues — ref null on custom components, useImperativeHandle setup, forwardRef with TypeScript, class components, and React 19 ref as prop changes.
Fix: React Warning — Each Child in a List Should Have a Unique key Prop
How to fix React's missing key prop warning — why keys matter for reconciliation, choosing stable keys, avoiding index as key pitfalls, keys in fragments, and performance impact.
Fix: React Portal Event Bubbling Not Working — Events Not Reaching Parent
How to fix React Portal event bubbling — understanding Portal event propagation, modal close on outside click, stopPropagation side effects, focus management, and accessibility.
Fix: React StrictMode Double Render — Side Effects Running Twice in Development
How to fix React StrictMode double render issues — understanding intentional double invocation, fixing side effects, useEffect cleanup, external subscriptions, and production behavior.
Fix: React Suspense Not Working — Boundary Not Catching or Fallback Not Showing
How to fix React Suspense boundaries not triggering — lazy() import syntax, use() hook, data fetching libraries, ErrorBoundary vs Suspense, and Next.js loading.tsx.
Fix: Ruby Bundler Version Conflict — Gemfile Requirements Could Not Be Resolved
How to fix Ruby Bundler gem version conflicts — Gemfile.lock resolution, platform-specific gems, bundle update strategies, conflicting transitive dependencies, and Bundler version issues.