Scaffold FastAPI + SQLModel + Alembic project, Postgres-backed

Config-driven DATABASE_URL shared by the app and Alembic's env.py
(fixes v1's config drift), psycopg3 driver, auto-discovering
app/models package for SQLModel.metadata, and a /health endpoint
that exercises the DB dependency end-to-end.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.env.example

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+DATABASE_URL=postgresql+psycopg://user:password@localhost:5432/vinindkoeb
+ENVIRONMENT=development

.gitignore

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+# Python
+__pycache__/
+*.py[oc]
+*.egg-info/
+build/
+dist/
+
+# venv / uv
+.venv/
+
+# Env / secrets
+.env
+
+# DB
+*.db
+*.sqlite3
+
+# Editors / OS
+.vscode/
+.idea/
+.DS_Store
+
+# Test cache
+.pytest_cache/

.python-version

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+3.13

CLAUDE.md

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+# Fælles Vinindkøb — Projektplan
+
+## Formål
+Erstatte manuel administration (regneark til betalingstracking, direkte
+databaseredigering for nye runder/deltagere/vine) med en rigtig
+admin-backend, samt automatisk betalings-mail til deltagere. Arkitekturen
+designes fra start til at kunne understøtte flere organisationer (fx
+vinbonden Horcher-familiens egne ruter i Frankrig/Belgien), selvom kun
+én organisation/rute er i drift i dag.
+
+## Tech stack
+- Backend: FastAPI + SQLModel + PostgreSQL + Alembic (migrations)
+- Frontend: React (admin-UI) + eksisterende offentlige bestillingsside
+  (fortsat intet login for deltagere)
+- Mail: SMTP-udbyder — afklares
+
+## Datamodel
+
+- **WineCategory** — global, delt af ALLE organisationer/ruter
+  (samme vinbonde, samme kategoristruktur: TRADITION, SELECTION,
+  LES IMPERTINENTS, GRANDS CRUS, VENDANGES TARDIVES, CREMANT, MAGNUM,
+  SANS ALCOOL osv.)
+  - navn, sortering
+
+- **Organization** — administrativ gruppe (fx "Fælles Vinindkøb DK",
+  "Horcher Frankrig")
+  - navn
+
+- **User** — admin-login, tilhører en Organization
+  - simpelt login v1 (password-hash + session/JWT), struktureret så
+    passkey/WebAuthn kan tilføjes senere uden brud
+
+- **Route** — tilhører en Organization (fx "Tyskland" for jer;
+  "Belgique" / "Paris" / "Massif Central" for Horcher-familien)
+  - navn, mødested/kontaktperson/telefon (fritekst, forudfyldes fra
+    forrige runde)
+
+- **Participant** — tilhører en Route
+  - navn, mail, telefon, is_active
+
+- **PurchaseRound** — tilhører en Route
+  - sæson (forår/efterår), år, status (kladde/åben/lukket)
+  - eur_dkk_rate (valgfri — ikke alle organisationer skal omregne)
+  - intro_text, pickup_info_text (forudfyldes fra forrige runde,
+    kun dato/sæson skal typisk rettes)
+
+- **WineOffering** — tilhører PurchaseRound + (global) WineCategory
+  - navn (inkl. størrelse, fx "75cl" — ikke separat felt v1)
+  - vintage/årgang, pris (EUR)
+  - is_organic (boolean — sat via checkbox, kilde: AB-mærket på
+    producentens prisliste)
+
+- **Order** — deltager + runde
+  - payment_status (ubetalt/betalt), paid_at
+
+- **OrderLine** — ordre + wine_offering + antal
+
+## Mail-events
+1. Runde åbnes → mail til alle aktive deltagere på ruten
+2. Ordre afgivet → kvittering til deltager + notifikation til admin (findes allerede)
+3. **Nyt:** Admin markerer ordre "betalt" → automatisk kvitteringsmail til deltager
+SMTP: Postal (selvhostet)
+
+## Fase 1 — nuværende scope
+1. Sæt FastAPI + SQLModel + PostgreSQL op med Alembic
+2. Definér modellerne ovenfor (inkl. Organization/Route-hierarki,
+   selvom kun én organisation/rute findes i dag)
+3. Manuel dataindtastning: deltagere (og evt. en aktiv runde) fra MongoDB til PostgreSQL
+4. Simpelt login til User
+5. Admin CRUD: deltagere (inkl. aktiv/inaktiv — erstatter "tom bestilling"-tricket)
+6. Admin CRUD: runder + vinliste, med "kopiér fra forrige runde"
+   (alle felter, inkl. kategori, forudfyldt og frit redigerbare)
+7. "Annoncér runde": skabelonmail til alle aktive deltagere på ruten
+8. Flyt offentlig bestillingsformular til nyt API (fortsat uden login)
+9. Admin-ordreoversigt pr. runde med "markér betalt" → trigger mail #3
+10. Genskab afhentningsliste (HTML-udtræk til print) mod ny datamodel
+11. Simpelt React admin-UI til pkt. 5, 6, 7, 9
+12. Testkør en rigtig runde gennem hele flowet
+
+## Fase 2 — senere
+- enablebanking.com: automatisk match af indbetalinger mod ubetalte
+  ordrer → kalder samme "markér betalt"-logik
+- Passkey-login til admin
+- Rute-vælger på bestillingssiden (når flere ruter er aktive samtidig)
+- sold_only_by_case-flag + validering, hvis det bliver relevant

README.md

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+# Vinindkøb v2
+
+Admin-backend til fælles vinindkøb (FastAPI + SQLModel + PostgreSQL +
+Alembic). Se [CLAUDE.md](CLAUDE.md) for projektplan og datamodel.
+
+## Kom i gang
+
+```
+uv sync
+cp .env.example .env   # udfyld DATABASE_URL med din egen Postgres-instans
+uv run alembic upgrade head
+uv run fastapi dev app/main.py
+```
+
+`GET /health` bekræfter at appen kan nå databasen.

alembic.ini

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+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts.
+# this is typically a path given in POSIX (e.g. forward slashes)
+# format, relative to the token %(here)s which refers to the location of this
+# ini file
+script_location = %(here)s/migrations
+
+# template used to generate migration file names; The default value is %%(rev)s_%%(slug)s
+# Uncomment the line below if you want the files to be prepended with date and time
+# see https://alembic.sqlalchemy.org/en/latest/tutorial.html#editing-the-ini-file
+# for all available tokens
+# file_template = %%(year)d_%%(month).2d_%%(day).2d_%%(hour).2d%%(minute).2d-%%(rev)s_%%(slug)s
+# Or organize into date-based subdirectories (requires recursive_version_locations = true)
+# file_template = %%(year)d/%%(month).2d/%%(day).2d_%%(hour).2d%%(minute).2d_%%(second).2d_%%(rev)s_%%(slug)s
+
+# sys.path path, will be prepended to sys.path if present.
+# defaults to the current working directory.  for multiple paths, the path separator
+# is defined by "path_separator" below.
+prepend_sys_path = .
+
+
+# timezone to use when rendering the date within the migration file
+# as well as the filename.
+# If specified, requires the tzdata library which can be installed by adding
+# `alembic[tz]` to the pip requirements.
+# string value is passed to ZoneInfo()
+# leave blank for localtime
+# timezone =
+
+# max length of characters to apply to the "slug" field
+# truncate_slug_length = 40
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+# set to 'true' to allow .pyc and .pyo files without
+# a source .py file to be detected as revisions in the
+# versions/ directory
+# sourceless = false
+
+# version location specification; This defaults
+# to <script_location>/versions.  When using multiple version
+# directories, initial revisions must be specified with --version-path.
+# The path separator used here should be the separator specified by "path_separator"
+# below.
+# version_locations = %(here)s/bar:%(here)s/bat:%(here)s/alembic/versions
+
+# path_separator; This indicates what character is used to split lists of file
+# paths, including version_locations and prepend_sys_path within configparser
+# files such as alembic.ini.
+# The default rendered in new alembic.ini files is "os", which uses os.pathsep
+# to provide os-dependent path splitting.
+#
+# Note that in order to support legacy alembic.ini files, this default does NOT
+# take place if path_separator is not present in alembic.ini.  If this
+# option is omitted entirely, fallback logic is as follows:
+#
+# 1. Parsing of the version_locations option falls back to using the legacy
+#    "version_path_separator" key, which if absent then falls back to the legacy
+#    behavior of splitting on spaces and/or commas.
+# 2. Parsing of the prepend_sys_path option falls back to the legacy
+#    behavior of splitting on spaces, commas, or colons.
+#
+# Valid values for path_separator are:
+#
+# path_separator = :
+# path_separator = ;
+# path_separator = space
+# path_separator = newline
+#
+# Use os.pathsep. Default configuration used for new projects.
+path_separator = os
+
+# set to 'true' to search source files recursively
+# in each "version_locations" directory
+# new in Alembic version 1.10
+# recursive_version_locations = false
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+# database URL.  This is consumed by the user-maintained env.py script only.
+# other means of configuring database URLs may be customized within the env.py
+# file.
+# Unused placeholder: env.py overrides this at runtime from app.core.config
+# (DATABASE_URL in .env), so the app and Alembic always share one source of truth.
+sqlalchemy.url = driver://user:pass@localhost/dbname
+
+
+[post_write_hooks]
+# post_write_hooks defines scripts or Python functions that are run
+# on newly generated revision scripts.  See the documentation for further
+# detail and examples
+
+# format using "black" - use the console_scripts runner, against the "black" entrypoint
+# hooks = black
+# black.type = console_scripts
+# black.entrypoint = black
+# black.options = -l 79 REVISION_SCRIPT_FILENAME
+
+# lint with attempts to fix using "ruff" - use the module runner, against the "ruff" module
+# hooks = ruff
+# ruff.type = module
+# ruff.module = ruff
+# ruff.options = check --fix REVISION_SCRIPT_FILENAME
+
+# Alternatively, use the exec runner to execute a binary found on your PATH
+# hooks = ruff
+# ruff.type = exec
+# ruff.executable = ruff
+# ruff.options = check --fix REVISION_SCRIPT_FILENAME
+
+# Logging configuration.  This is also consumed by the user-maintained
+# env.py script only.
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARNING
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARNING
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S

app/core/config.py

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+from functools import lru_cache
+
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    database_url: str
+    environment: str = "development"
+
+    model_config = SettingsConfigDict(
+        env_file=".env",
+        env_file_encoding="utf-8",
+        extra="ignore",
+    )
+
+
+@lru_cache
+def get_settings() -> Settings:
+    return Settings()

app/db.py

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+from collections.abc import Generator
+from typing import Annotated
+
+from fastapi import Depends
+from sqlmodel import Session, create_engine
+
+from app.core.config import get_settings
+
+settings = get_settings()
+
+engine = create_engine(
+    settings.database_url,
+    echo=settings.environment == "development",
+    pool_pre_ping=True,
+)
+
+
+def get_session() -> Generator[Session, None, None]:
+    with Session(engine) as session:
+        yield session
+
+
+SessionDep = Annotated[Session, Depends(get_session)]

app/main.py

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+from fastapi import FastAPI
+from sqlalchemy import text
+
+from app.db import SessionDep
+
+app = FastAPI(title="Vinindkøb Admin API")
+
+
+@app.get("/health")
+def health(session: SessionDep) -> dict:
+    session.exec(text("SELECT 1"))
+    return {"status": "ok", "database": "ok"}

app/models/__init__.py

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+"""Import every model module so SQLModel.metadata is fully populated
+for Alembic autogenerate — new model files are picked up automatically,
+no manual registration needed here."""
+
+from importlib import import_module
+from pkgutil import iter_modules
+
+for _, module_name, _ in iter_modules(__path__):
+    import_module(f"{__name__}.{module_name}")

migrations/README

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+Generic single-database configuration.

migrations/env.py

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+import os
+import sys
+from logging.config import fileConfig
+
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+from sqlmodel import SQLModel
+
+from alembic import context
+
+sys.path.append(os.getcwd())  # make `app` importable regardless of cwd
+
+from app.core.config import get_settings  # noqa: E402
+from app import models  # noqa: E402,F401  -- populates SQLModel.metadata via auto-import
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Share one source of truth for the DB URL with the FastAPI app instead of
+# whatever placeholder sits in alembic.ini.
+config.set_main_option("sqlalchemy.url", get_settings().database_url)
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+target_metadata = SQLModel.metadata
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+
+def run_migrations_offline() -> None:
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section, {}),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection, target_metadata=target_metadata
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

migrations/script.py.mako

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+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision: str = ${repr(up_revision)}
+down_revision: Union[str, Sequence[str], None] = ${repr(down_revision)}
+branch_labels: Union[str, Sequence[str], None] = ${repr(branch_labels)}
+depends_on: Union[str, Sequence[str], None] = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    ${downgrades if downgrades else "pass"}

pyproject.toml

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+[project]
+name = "vinindkoeb-v2"
+version = "0.1.0"
+description = "Add your description here"
+requires-python = ">=3.13"
+dependencies = [
+    "alembic>=1.20.0",
+    "fastapi[standard]>=0.141.1",
+    "psycopg[binary]>=3.3.6",
+    "pydantic-settings>=2.15.0",
+    "sqlmodel>=0.0.47",
+]
+
+[dependency-groups]
+dev = [
+    "httpx>=0.28.1",
+    "pytest>=9.1.1",
+]