839 articles — Page 10 of 70
How to fix psycopg errors — psycopg2 to psycopg 3 import migration, connection pool setup, row factory tuple vs dict, COPY protocol changes, async psycopg pool, server-side cursor confusion, and binary mode performance.
How to fix SQLModel errors — table not created without table=True, relationship not eager-loaded MissingGreenlet, AttributeError on lazy attribute, mixing Pydantic and Table classes, Optional vs default None, and async session setup.
How to fix Alembic errors — autogenerate not detecting model changes, Multiple head revisions, can't locate revision, downgrade fails, async engine support, and database URL configuration.
How to fix asyncpg errors — connection refused localhost 5432, pool exhausted timeout, prepared statement does not exist, type codec not registered, JSON automatic conversion, and transaction rollback on exception.
How to fix PDM errors — pdm install fails resolving dependencies, lock file outdated warning, __pypackages__ vs venv confusion, pdm run script not found, build backend missing, and dependency groups setup.
How to fix freezegun errors — freeze_time decorator not affecting datetime.now, timezone-aware datetime mismatch, time.time not frozen, async test time leak, third-party library still using real time, and tick parameter behavior.
How to fix Moto errors — mock not activating, real AWS credentials used in tests, ImportError mock_s3 removed in v5, fixtures with multiple services, NoCredentialsError despite mock, and standalone server mode.
How to fix Hatch errors — hatch env create fails, scripts not found, build backend hatchling missing, version not detected, plugin install errors, and publishing to PyPI.
How to fix Nox errors — no noxfile.py found, session not detected, virtualenv backend uv not installed, session.install fails outside virtualenv, parametrize matrix exploding, and reuse_venv confusion.
How to fix Milvus errors — pymilvus connection refused localhost 19530, collection schema mismatch, index not built before search, partition not found, embedded vs standalone vs cluster, and flush before search.
How to fix MkDocs errors — Config value 'theme' must be a string or dict, mkdocstrings not generating API docs, navigation pages missing, mkdocs serve port already in use, GitHub Pages deploy failed, and broken links not detected.
How to fix Weaviate errors — client v3 to v4 migration breaking imports, schema creation property mismatch, vectorizer module not loaded, connection refused localhost 8080, batch import errors, and hybrid search alpha tuning.