tenants2fast-fastapi 0.2.0

Multi-tenancy management module for FastAPI with tenant isolation and permission-aware middleware

tenants2fast-fastapi

🏢 Multi-tenancy management for FastAPI — tenant isolation, JWT-aware middleware, and permission-gated endpoints, all wired up in minutes.

Part of the *2fast-fastapi ecosystem: oauth2fast-fastapi → permissions2fast-fastapi → tenants2fast-fastapi.

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Features

• 🔐 JWT-aware TenantMiddleware — extracts user from Bearer token and sets tenant context automatically on every request
• 🏗️ Isolated tenant databases — each tenant gets its own PostgreSQL database, created and initialized at runtime
• 🗂️ Tenant and UserTenant SQLModel models — ready-to-use ORM models with audit timestamps
• ⚡ Redis caching — tenant data and user permissions are cached via permissions2fast-fastapi
• 🔒 require_permission dependency — guard any route with a single line using the RBAC system from permissions2fast-fastapi

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Installation

pip install tenants2fast-fastapi

Or with uv:

uv add tenants2fast-fastapi

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Quick Start

from fastapi import Depends, FastAPI
from tenant2fast_fastapi import (
    TenantMiddleware,
    get_current_tenant,
    get_current_user,
    require_permission,
)

app = FastAPI()

# 1. Register the middleware
app.add_middleware(TenantMiddleware)

# 2. Use dependencies in your endpoints
@app.get("/me/tenant")
async def my_tenant(tenant=Depends(get_current_tenant)):
    return {"name": tenant.name, "slug": tenant.slug}

@app.get("/reports", dependencies=[Depends(require_permission("/reports", "GET"))])
async def reports(user=Depends(get_current_user)):
    return {"user": user.email}

See examples/basic_usage.py for a more complete example.

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Configuration

All settings use the TENANT_ prefix and can be provided via environment variables or a .env file.

Variable	Default	Description
TENANT_DB_PREFIX	tenant_	Prefix for per-tenant database names
TENANT_SUPERUSER_DB__HOSTNAME	localhost	PG host for superuser operations
TENANT_SUPERUSER_DB__PORT	5432	PG port
TENANT_SUPERUSER_DB__USERNAME	postgres	PG superuser username
TENANT_SUPERUSER_DB__PASSWORD	postgres	PG superuser password
TENANT_SUPERUSER_DB__NAME	postgres	Default DB for superuser connection
TENANT_MAX_TENANT_CONNECTIONS	5	Connection pool size per tenant

In addition, all variables required by oauth2fast-fastapi (JWT, DB connections, mail) and permissions2fast-fastapi (Redis) must be set — see their respective READMEs.

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Public API

from tenant2fast_fastapi import (
    Tenant,                   # SQLModel ORM model (table: tenants)
    UserTenant,               # Many-to-many User ↔ Tenant (table: user_tenants)
    TenantMiddleware,         # Starlette BaseHTTPMiddleware
    get_current_tenant,       # FastAPI dependency → Tenant
    get_current_user,         # FastAPI dependency → User (from oauth2fast-fastapi)
    require_permission,       # Dependency factory → checks RBAC + cache
    create_tenant_database,   # async — creates a PG database for a tenant
    get_tenant_engine,        # returns (cached) AsyncEngine for a tenant DB
    initialize_tenant_schema, # async — runs SQLModel.metadata.create_all on tenant DB
)

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Development

# Clone and install in editable mode with dev + test dependencies
git clone https://github.com/AngelDanielSanchezCastillo/tenants2fast-fastapi
cd tenants2fast-fastapi
uv sync --group dev --group test

# Copy .env and adjust to your local setup
cp .env .env.local   # or just edit .env directly

# Run tests (requires PostgreSQL + Redis)
uv run pytest tests/ -v

# Build distribution
uv build

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Related Packages

Package	PyPI	Purpose
log2fast-fastapi		Structured logging
pgsqlasync2fast-fastapi		Async PostgreSQL connection manager
mailing2fast-fastapi		SMTP email sender
oauth2fast-fastapi		JWT Auth + User management
permissions2fast-fastapi		RBAC + Redis permission cache

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License

MIT © Angel Daniel Sanchez Castillo