SQLAlchemy on Manvendra Rajpoot https://blog.rajpoot.dev/tags/sqlalchemy/ Recent content in SQLAlchemy on Manvendra Rajpoot Manvendra Rajpoot https://blog.rajpoot.dev/img/personal/cover.png https://blog.rajpoot.dev/img/personal/cover.png Hugo en Manvendra Rajpoot Sun, 17 May 2026 17:50:46 +0530 Integration Cheatsheet 01 — Full-Stack Project Skeleton https://blog.rajpoot.dev/cheatsheets/integrations/01-full-stack-skeleton-cheatsheet/ Sat, 16 May 2026 06:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/integrations/01-full-stack-skeleton-cheatsheet/ FastAPI + SQLAlchemy + Pydantic + Alembic project skeleton. SQLAlchemy + Postgres Cheatsheet 01 — asyncpg / psycopg Setup https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/01-asyncpg-psycopg-setup-cheatsheet/ Wed, 13 May 2026 06:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/01-asyncpg-psycopg-setup-cheatsheet/ asyncpg vs psycopg setup, connection args, server settings, PgBouncer config. SQLAlchemy Cheatsheet 01 — Engine, Pool, and Connection https://blog.rajpoot.dev/cheatsheets/sqlalchemy/01-engine-pool-cheatsheet/ Tue, 12 May 2026 06:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/01-engine-pool-cheatsheet/ SQLAlchemy 2.0 engine + connection cheatsheet — URLs, pooling, events, lifespan. Alembic Textbook Ch. 1 — Introduction and Setup https://blog.rajpoot.dev/textbooks/alembic/01-introduction-setup/ Sun, 10 May 2026 06:00:00 +0530 https://blog.rajpoot.dev/textbooks/alembic/01-introduction-setup/ Chapter 1 — Alembic introduction: what it is, setup, env.py, naming conventions. Postgres SQLAlchemy Textbook Ch. 1 — Dialects, asyncpg vs psycopg, and Postgres Setup https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/01-postgres-dialects-asyncpg-psycopg/ Fri, 08 May 2026 06:00:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/01-postgres-dialects-asyncpg-psycopg/ Chapter 1 — SQLAlchemy with Postgres: choosing a driver (asyncpg / psycopg / psycopg2), connection setup, server settings. SQLAlchemy 2.0 Textbook Ch. 1 — Introduction, Core vs ORM, and the 2.0 Mental Model https://blog.rajpoot.dev/textbooks/sqlalchemy/01-introduction-core-vs-orm/ Thu, 07 May 2026 06:00:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/01-introduction-core-vs-orm/ Chapter 1 — SQLAlchemy 2.0 fundamentals: the unified Core/ORM API, engine, connection, the 2.0 style query. SQLAlchemy + Postgres Cheatsheet 02 — JSONB Patterns https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/02-jsonb-cheatsheet/ Wed, 13 May 2026 06:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/02-jsonb-cheatsheet/ JSONB in SQLAlchemy — column declaration, queries, indexing, updates. SQLAlchemy Cheatsheet 02 — Schema, Mapped Columns, and Types https://blog.rajpoot.dev/cheatsheets/sqlalchemy/02-schema-types-cheatsheet/ Tue, 12 May 2026 06:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/02-schema-types-cheatsheet/ SQLAlchemy 2.0 schema cheatsheet — Mapped, mapped_column, types, defaults, indexes, constraints. Postgres SQLAlchemy Textbook Ch. 2 — JSONB, Arrays, Ranges, and Postgres-Specific Types https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/02-postgres-types-jsonb-arrays/ Fri, 08 May 2026 06:10:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/02-postgres-types-jsonb-arrays/ Chapter 2 — Postgres-specific types in SQLAlchemy: JSONB, ARRAY, ranges, citext, INTERVAL, NUMRANGE, INET. SQLAlchemy 2.0 Textbook Ch. 2 — Engine, Pooling, and Connections https://blog.rajpoot.dev/textbooks/sqlalchemy/02-engine-pooling-connections/ Thu, 07 May 2026 06:10:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/02-engine-pooling-connections/ Chapter 2 — SQLAlchemy engine internals: pooling strategies, connection lifecycle, events, dialects. Integration Cheatsheet 03 — Pydantic ↔ SQLAlchemy Mapping https://blog.rajpoot.dev/cheatsheets/integrations/03-pydantic-sqlalchemy-mapping-cheatsheet/ Sat, 16 May 2026 06:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/integrations/03-pydantic-sqlalchemy-mapping-cheatsheet/ Map Pydantic schemas to SQLAlchemy models — Read/Create/Update, from_attributes. SQLAlchemy + Postgres Cheatsheet 03 — Arrays https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/03-arrays-cheatsheet/ Wed, 13 May 2026 06:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/03-arrays-cheatsheet/ Postgres ARRAY in SQLAlchemy — column, operations, indexing. SQLAlchemy Cheatsheet 03 — Session and Unit of Work https://blog.rajpoot.dev/cheatsheets/sqlalchemy/03-session-cheatsheet/ Tue, 12 May 2026 06:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/03-session-cheatsheet/ SQLAlchemy 2.0 session cheatsheet — session lifecycle, flush vs commit, identity map, expire. Postgres SQLAlchemy Textbook Ch. 3 — Postgres Indexes in SQLAlchemy https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/03-postgres-indexes/ Fri, 08 May 2026 06:20:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/03-postgres-indexes/ Chapter 3 — Postgres index types in SQLAlchemy: B-tree, GIN, GiST, BRIN, HASH, partial, expression, INCLUDE. SQLAlchemy 2.0 Textbook Ch. 3 — Schema and the Type System https://blog.rajpoot.dev/textbooks/sqlalchemy/03-schema-and-types/ Thu, 07 May 2026 06:20:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/03-schema-and-types/ Chapter 3 — SQLAlchemy schema definition: Mapped, mapped_column, types, defaults, indexes, constraints. SQLAlchemy + Postgres Cheatsheet 04 — Ranges, INTERVAL, citext, INET https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/04-ranges-intervals-cheatsheet/ Wed, 13 May 2026 06:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/04-ranges-intervals-cheatsheet/ Postgres range types, INTERVAL, citext, INET in SQLAlchemy. SQLAlchemy Cheatsheet 04 — select(), where, joins, aggregates https://blog.rajpoot.dev/cheatsheets/sqlalchemy/04-select-queries-cheatsheet/ Tue, 12 May 2026 06:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/04-select-queries-cheatsheet/ SQLAlchemy 2.0 select() cheatsheet — filters, joins, aggregates, CTEs, subqueries. Postgres SQLAlchemy Textbook Ch. 4 — Full-Text Search https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/04-full-text-search/ Fri, 08 May 2026 06:30:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/04-full-text-search/ Chapter 4 — Postgres FTS via SQLAlchemy: tsvector, tsquery, GIN index, ranking, websearch. SQLAlchemy 2.0 Textbook Ch. 4 — The Session and the Unit of Work https://blog.rajpoot.dev/textbooks/sqlalchemy/04-session-and-unit-of-work/ Thu, 07 May 2026 06:30:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/04-session-and-unit-of-work/ Chapter 4 — Sessions in SQLAlchemy 2.0: lifecycle, identity map, flush vs commit, expire, and the unit of work pattern. SQLAlchemy + Postgres Cheatsheet 05 — Indexes (B-tree, GIN, GiST, BRIN, HASH) https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/05-indexes-cheatsheet/ Wed, 13 May 2026 06:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/05-indexes-cheatsheet/ Postgres index types in SQLAlchemy — B-tree, GIN, GiST, BRIN, HASH, partial, expression, INCLUDE. SQLAlchemy Cheatsheet 05 — Relationships and Loading Strategies https://blog.rajpoot.dev/cheatsheets/sqlalchemy/05-relationships-cheatsheet/ Tue, 12 May 2026 06:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/05-relationships-cheatsheet/ SQLAlchemy relationships cheatsheet — 1:N, M:N, 1:1, loading strategies, cascade. Postgres SQLAlchemy Textbook Ch. 5 — Locking, Advisory Locks, and SKIP LOCKED https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/05-locking-advisory/ Fri, 08 May 2026 06:40:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/05-locking-advisory/ Chapter 5 — Postgres locking via SQLAlchemy: row locks, advisory locks, SKIP LOCKED, queue patterns. SQLAlchemy 2.0 Textbook Ch. 5 — Querying with select() https://blog.rajpoot.dev/textbooks/sqlalchemy/05-querying-with-select/ Thu, 07 May 2026 06:40:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/05-querying-with-select/ Chapter 5 — Querying SQLAlchemy: select(), filtering, joins, aggregations, subqueries, CTEs, and the result API. Integration Cheatsheet 06 — Multi-Tenancy Across the Stack https://blog.rajpoot.dev/cheatsheets/integrations/06-multitenancy-stack-cheatsheet/ Sat, 16 May 2026 06:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/integrations/06-multitenancy-stack-cheatsheet/ End-to-end multi-tenancy: FastAPI middleware + SQLAlchemy + Postgres RLS. SQLAlchemy + Postgres Cheatsheet 06 — Full-Text Search https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/06-fts-cheatsheet/ Wed, 13 May 2026 06:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/06-fts-cheatsheet/ Postgres FTS in SQLAlchemy — tsvector, tsquery, GIN, ranking, websearch. SQLAlchemy Cheatsheet 06 — Transactions and Concurrency https://blog.rajpoot.dev/cheatsheets/sqlalchemy/06-transactions-concurrency-cheatsheet/ Tue, 12 May 2026 06:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/06-transactions-concurrency-cheatsheet/ SQLAlchemy 2.0 transactions cheatsheet — isolation, savepoints, FOR UPDATE, optimistic locking. Postgres SQLAlchemy Textbook Ch. 6 — LISTEN / NOTIFY for Pub/Sub https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/06-listen-notify/ Fri, 08 May 2026 06:50:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/06-listen-notify/ Chapter 6 — Postgres LISTEN/NOTIFY via asyncpg + SQLAlchemy: real-time triggers, queue wakeup, low-latency events. SQLAlchemy 2.0 Textbook Ch. 6 — Relationships and Loading Strategies https://blog.rajpoot.dev/textbooks/sqlalchemy/06-relationships/ Thu, 07 May 2026 06:50:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/06-relationships/ Chapter 6 — Relationships in SQLAlchemy 2.0: one-to-many, many-to-many, lazy / eager loading, joinedload, selectinload. SQLAlchemy + Postgres Cheatsheet 07 — Locking, SKIP LOCKED, Advisory Locks https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/07-locking-cheatsheet/ Wed, 13 May 2026 07:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/07-locking-cheatsheet/ Postgres locking via SQLAlchemy — FOR UPDATE, NOWAIT, SKIP LOCKED, advisory locks. SQLAlchemy Cheatsheet 07 — Async Patterns and Streaming https://blog.rajpoot.dev/cheatsheets/sqlalchemy/07-async-patterns-cheatsheet/ Tue, 12 May 2026 07:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/07-async-patterns-cheatsheet/ SQLAlchemy 2.0 async cheatsheet — AsyncSession, streaming, awaitable_attrs, run_sync. Postgres SQLAlchemy Textbook Ch. 7 — Partitioning Strategies https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/07-partitioning/ Fri, 08 May 2026 07:00:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/07-partitioning/ Chapter 7 — Postgres partitioning with SQLAlchemy: declarative partitions, range/list/hash, pg_partman. SQLAlchemy 2.0 Textbook Ch. 7 — Transactions and Concurrency https://blog.rajpoot.dev/textbooks/sqlalchemy/07-transactions-concurrency/ Thu, 07 May 2026 07:00:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/07-transactions-concurrency/ Chapter 7 — Transactions and concurrency in SQLAlchemy: isolation levels, savepoints, with_for_update, optimistic locking, deadlock retry. SQLAlchemy + Postgres Cheatsheet 08 — LISTEN / NOTIFY https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/08-listen-notify-cheatsheet/ Wed, 13 May 2026 07:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/08-listen-notify-cheatsheet/ Postgres LISTEN/NOTIFY via asyncpg — real-time pub/sub for SQLAlchemy apps. SQLAlchemy Cheatsheet 08 — Performance, N+1, Bulk Ops, Streaming https://blog.rajpoot.dev/cheatsheets/sqlalchemy/08-performance-cheatsheet/ Tue, 12 May 2026 07:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/08-performance-cheatsheet/ SQLAlchemy 2.0 performance cheatsheet — N+1 prevention, bulk ops, server-side cursors, query analysis. Postgres SQLAlchemy Textbook Ch. 8 — Row-Level Security and Multi-Tenancy https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/08-rls-multitenancy/ Fri, 08 May 2026 07:10:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/08-rls-multitenancy/ Chapter 8 — Postgres RLS via SQLAlchemy: per-row tenant isolation with Postgres RLS policies. SQLAlchemy 2.0 Textbook Ch. 8 — Async SQLAlchemy in Depth https://blog.rajpoot.dev/textbooks/sqlalchemy/08-async-deep-dive/ Thu, 07 May 2026 07:10:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/08-async-deep-dive/ Chapter 8 — Async SQLAlchemy 2.0: AsyncEngine, AsyncSession, async streaming, lazy loading caveats, and FastAPI integration. SQLAlchemy + Postgres Cheatsheet 09 — Row-Level Security for Multi-Tenancy https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/09-rls-multitenancy-cheatsheet/ Wed, 13 May 2026 07:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/09-rls-multitenancy-cheatsheet/ Postgres RLS in SQLAlchemy — policies, contextvars, app role. SQLAlchemy Cheatsheet 09 — Migrations Integration (Alembic) https://blog.rajpoot.dev/cheatsheets/sqlalchemy/09-migrations-integration-cheatsheet/ Tue, 12 May 2026 07:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/09-migrations-integration-cheatsheet/ SQLAlchemy + Alembic integration cheatsheet — env.py, autogenerate, naming conventions. Postgres SQLAlchemy Textbook Ch. 9 — Upsert, Bulk Insert, and COPY https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/09-upsert-bulk/ Fri, 08 May 2026 07:20:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/09-upsert-bulk/ Chapter 9 — Postgres upsert (ON CONFLICT) via SQLAlchemy, bulk insert, COPY for huge loads. SQLAlchemy 2.0 Textbook Ch. 9 — Performance: N+1, Bulk Ops, Streaming https://blog.rajpoot.dev/textbooks/sqlalchemy/09-performance/ Thu, 07 May 2026 07:20:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/09-performance/ Chapter 9 — SQLAlchemy performance: N+1 prevention, bulk inserts, streaming, indexes, query analysis. SQLAlchemy + Postgres Cheatsheet 10 — Upsert, RETURNING, and COPY https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/10-upsert-bulk-cheatsheet/ Wed, 13 May 2026 07:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/10-upsert-bulk-cheatsheet/ Postgres-specific upsert / RETURNING / COPY in SQLAlchemy. SQLAlchemy Cheatsheet 10 — Production Patterns https://blog.rajpoot.dev/cheatsheets/sqlalchemy/10-production-cheatsheet/ Tue, 12 May 2026 07:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/10-production-cheatsheet/ SQLAlchemy 2.0 production cheatsheet — PgBouncer, read replicas, OTEL, multi-tenancy. Postgres SQLAlchemy Textbook Ch. 10 — Replication, Failover, and pgvector https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/10-replication-failover-pgvector/ Fri, 08 May 2026 07:30:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy-postgres/10-replication-failover-pgvector/ Chapter 10 — Replication, failover handling, and pgvector with SQLAlchemy. SQLAlchemy 2.0 Textbook Ch. 10 — Migrations and Schema Evolution https://blog.rajpoot.dev/textbooks/sqlalchemy/10-migrations/ Thu, 07 May 2026 07:30:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/10-migrations/ Chapter 10 — Schema migrations with SQLAlchemy and Alembic: integration patterns, autogenerate, branching, online schema changes. SQLAlchemy + Postgres Cheatsheet 11 — Partitioning https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/11-partitioning-cheatsheet/ Wed, 13 May 2026 07:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/11-partitioning-cheatsheet/ Postgres partitioning in SQLAlchemy — range/list/hash partitions, pg_partman. SQLAlchemy Cheatsheet 11 — Events and Hooks https://blog.rajpoot.dev/cheatsheets/sqlalchemy/11-events-hooks-cheatsheet/ Tue, 12 May 2026 07:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/11-events-hooks-cheatsheet/ SQLAlchemy 2.0 events cheatsheet — engine, session, mapper, attribute events. SQLAlchemy 2.0 Textbook Ch. 11 — Testing https://blog.rajpoot.dev/textbooks/sqlalchemy/11-testing/ Thu, 07 May 2026 07:40:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/11-testing/ Chapter 11 — Testing SQLAlchemy: per-test transactions, testcontainers, factories, and async test fixtures. SQLAlchemy + Postgres Cheatsheet 12 — pgvector (Embeddings) https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/12-pgvector-cheatsheet/ Wed, 13 May 2026 07:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/12-pgvector-cheatsheet/ pgvector with SQLAlchemy — vector column, HNSW / IVFFlat indexes, similarity queries. SQLAlchemy + Postgres Cheatsheet 12 — Schema-Per-Tenant https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/12-schema-per-tenant-cheatsheet/ Wed, 13 May 2026 07:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/12-schema-per-tenant-cheatsheet/ Schema-per-tenant pattern in SQLAlchemy with Postgres. SQLAlchemy Cheatsheet 12 — Repository and Unit-of-Work Pattern https://blog.rajpoot.dev/cheatsheets/sqlalchemy/12-repository-pattern-cheatsheet/ Tue, 12 May 2026 07:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/12-repository-pattern-cheatsheet/ SQLAlchemy repository pattern cheatsheet — separation of concerns, testability, generic repos. SQLAlchemy 2.0 Textbook Ch. 12 — Production Patterns https://blog.rajpoot.dev/textbooks/sqlalchemy/12-production-patterns/ Thu, 07 May 2026 07:50:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/12-production-patterns/ Chapter 12 — Production SQLAlchemy: connection pooling, read replicas, observability, multi-tenancy, and operational patterns. SQLAlchemy + Postgres Cheatsheet 13 — DB-Per-Tenant https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/13-db-per-tenant-cheatsheet/ Wed, 13 May 2026 08:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/13-db-per-tenant-cheatsheet/ DB-per-tenant pattern in SQLAlchemy — engine cache, lifespan, migrations. SQLAlchemy Cheatsheet 13 — Soft Delete, Audit, and Timestamps https://blog.rajpoot.dev/cheatsheets/sqlalchemy/13-soft-delete-audit-cheatsheet/ Tue, 12 May 2026 08:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/13-soft-delete-audit-cheatsheet/ SQLAlchemy soft-delete and audit cheatsheet — mixins, event hooks, query filters. SQLAlchemy + Postgres Cheatsheet 14 — pgvector for Embeddings https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/14-pgvector-cheatsheet/ Wed, 13 May 2026 08:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/14-pgvector-cheatsheet/ pgvector in SQLAlchemy — vector columns, distance queries, HNSW / IVFFlat indexes. SQLAlchemy Cheatsheet 14 — Multi-Tenancy Patterns https://blog.rajpoot.dev/cheatsheets/sqlalchemy/14-multitenancy-cheatsheet/ Tue, 12 May 2026 08:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/14-multitenancy-cheatsheet/ SQLAlchemy multi-tenancy cheatsheet — tenant column, schema-per-tenant, DB-per-tenant. SQLAlchemy + Postgres Cheatsheet 15 — Replication, Read Replicas, and Failover https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/15-replication-failover-cheatsheet/ Wed, 13 May 2026 08:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy-postgres/15-replication-failover-cheatsheet/ Postgres replication via SQLAlchemy — write/read engines, multi-host failover. SQLAlchemy Cheatsheet 15 — Common Pitfalls and Fixes https://blog.rajpoot.dev/cheatsheets/sqlalchemy/15-common-pitfalls-cheatsheet/ Tue, 12 May 2026 08:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/15-common-pitfalls-cheatsheet/ SQLAlchemy 2.0 common pitfalls cheatsheet — the bugs you'll hit and how to fix them. SQLAlchemy Cheatsheet 16 — Type Annotations and Mapped Style https://blog.rajpoot.dev/cheatsheets/sqlalchemy/16-type-annotations-cheatsheet/ Tue, 12 May 2026 08:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/16-type-annotations-cheatsheet/ SQLAlchemy 2.0 type-annotation cheatsheet — Mapped, mapped_column, type_annotation_map, custom types. SQLAlchemy Cheatsheet 17 — Inheritance and Polymorphism https://blog.rajpoot.dev/cheatsheets/sqlalchemy/17-inheritance-cheatsheet/ Tue, 12 May 2026 08:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/17-inheritance-cheatsheet/ SQLAlchemy 2.0 inheritance cheatsheet — single-table, joined-table, concrete inheritance, polymorphic queries. SQLAlchemy Cheatsheet 18 — Hybrid Properties, Computed Columns, and Aggregates https://blog.rajpoot.dev/cheatsheets/sqlalchemy/18-hybrid-computed-cheatsheet/ Tue, 12 May 2026 08:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/18-hybrid-computed-cheatsheet/ SQLAlchemy 2.0 hybrid_property / computed_column / column_property cheatsheet. SQLAlchemy Cheatsheet 19 — Change Feeds, Outbox, and Logical Replication https://blog.rajpoot.dev/cheatsheets/sqlalchemy/19-change-feeds-cheatsheet/ Tue, 12 May 2026 09:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/19-change-feeds-cheatsheet/ SQLAlchemy change-feed cheatsheet — outbox pattern, CDC, logical replication, SKIP LOCKED workers. SQLAlchemy Cheatsheet 20 — Recipes (Pagination, Filtering, Sorting, Bulk) https://blog.rajpoot.dev/cheatsheets/sqlalchemy/20-recipes-cheatsheet/ Tue, 12 May 2026 09:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/20-recipes-cheatsheet/ SQLAlchemy 2.0 recipes — cursor pagination, dynamic filtering, sort builders, bulk upsert. SQLAlchemy 2.0 Deep Patterns in 2026 — Async, Mapped Types, and Production Tricks https://blog.rajpoot.dev/posts/python/sqlalchemy-2-deep-patterns-2026/ Thu, 30 Apr 2026 15:50:00 +0530 https://blog.rajpoot.dev/posts/python/sqlalchemy-2-deep-patterns-2026/ SQLAlchemy 2.0 production patterns in 2026 — Mapped types, async, sessions, hybrid properties, batching, and the patterns that scale. FastAPI + Pydantic v2 + SQLAlchemy 2.0 — Production Patterns for 2026 https://blog.rajpoot.dev/posts/fastapi/fastapi-pydantic-v2-sqlalchemy-2-production/ Tue, 28 Apr 2026 17:00:00 +0530 https://blog.rajpoot.dev/posts/fastapi/fastapi-pydantic-v2-sqlalchemy-2-production/ The FastAPI stack worth building on in 2026 — Pydantic v2, async SQLAlchemy 2.0, dependency injection, settings, errors, observability, and the layout that scales past one file. FastAPI + SQLAlchemy + PostgreSQL: A Modern Setup https://blog.rajpoot.dev/posts/fastapi/fastapi-with-sqlalchemy/ Tue, 28 Apr 2026 13:45:00 +0530 https://blog.rajpoot.dev/posts/fastapi/fastapi-with-sqlalchemy/ A practical guide to wiring FastAPI to PostgreSQL with SQLAlchemy 2.0 (async), Alembic migrations, and a sane project structure.