Pydantic Cheatsheet 14 — FastAPI Patterns
Cheatsheet: Read/Create/Update model trio, PATCH partial updates, Pagination class, filter from class.
Python
SQLAlchemy Cheatsheet 14 — Multi-Tenancy Patterns
Cheatsheet: shared DB + tenant_id, schema-per-tenant, DB-per-tenant, query filters, context propagation.
Python Cheatsheet 15 — stdlib logging Configuration
Cheatsheet: basicConfig, named loggers, handlers, formatters, dictConfig.
Pydantic Cheatsheet 15 — Recursive Models and Forward References
Cheatsheet: self-referencing, model_rebuild, mutually recursive, tree / graph patterns.
SQLAlchemy Cheatsheet 15 — Common Pitfalls and Fixes
Cheatsheet: N+1, IntegrityError, DetachedInstanceError, MissingGreenlet, lazy-load in async, pool exhaustion.
Python Cheatsheet 16 — Sets, Dicts, and Common Patterns
Cheatsheet: set/dict operations, merging, grouping, set ops.
Pydantic Cheatsheet 16 — Computed Fields
Cheatsheet: @computed_field, alias, exclude, type annotation, caching.
SQLAlchemy Cheatsheet 16 — Type Annotations and Mapped Style
Cheatsheet: Mapped types, mapped_column with types, type_annotation_map, Annotated types, generic mapping.
Python Cheatsheet 17 — Strings, f-strings, and Encoding
Cheatsheet: f-string formatting, str methods, bytes/str, encoding, regex basics.
Pydantic Cheatsheet 17 — pydantic.dataclasses
Cheatsheet: pydantic.dataclass vs BaseModel, attrs comparison, stdlib dataclass conversion.