Gegenstands-Verwaltung (Non-Food) neben Lebensmitteln

Die Kategorie bestimmt die Verwaltungsart (food/object). Gegenstaende:
Menge je Lagerort statt Chargen/MHD, Umlagern (ohne Grund) und Entfernen
mit Pflicht-Grund samt Entnahme-Statistik. Beliebig viele eigene Felder
je Kategorie (vererbt an Unterkategorien), "gekauft bei" ueber eine
verwaltbare Shop-Liste und ein Produktlink. Barcode-Lookup zusaetzlich
ueber Open Products Facts.

Der Lebensmittel-Teil (Chargen/MHD/FEFO) bleibt unveraendert. Umgesetzt in
Backend (FastAPI, +Tests gruen), Web (React) und iOS (SwiftUI).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/app/routers/products.py

@@ -2,17 +2,41 @@ from fastapi import APIRouter, Depends, HTTPException, status
 from fastapi.responses import Response
 from sqlalchemy.orm import Session
 
-from ..crud import product_to_out
+from ..crud import product_to_out, product_tracking
 from ..database import get_db
 from ..deps import get_current_user, require_admin
-from ..models import Barcode, BaseUnit, Category, Group, Product, ProductImage, User
+from ..models import (
+    Barcode,
+    BaseUnit,
+    Category,
+    Group,
+    Location,
+    Movement,
+    MovementType,
+    Product,
+    ProductImage,
+    RemovalReason,
+    Shop,
+    User,
+)
 from ..off import lookup_barcode
-from ..schemas import BarcodeCreate, LookupResult, ProductCreate, ProductOut, ProductUpdate
+from ..schemas import (
+    BarcodeCreate,
+    LookupResult,
+    ProductCreate,
+    ProductOut,
+    ProductUpdate,
+    RemovalHistoryItem,
+    RemovalStat,
+    RemovalSummary,
+)
 from ..services import images
 from ..services.categories import suggest_category
 from .categories import descendant_ids
 from ..services.conversion import ConversionError, resolve_product_unit
+from ..services.fields import FieldError, apply_field_values
 from ..services.group_codes import detach as detach_group_code, sync as sync_group_code
+from ..services.stock import removal_stats
 
 router = APIRouter(prefix="/products", tags=["products"])
 
@@ -92,6 +116,56 @@ def get_product(
     return product_to_out(db, product)
 
 
+@router.get("/{product_id}/removals", response_model=RemovalSummary)
+def product_removals(
+    product_id: int,
+    db: Session = Depends(get_db),
+    _: User = Depends(get_current_user),
+) -> RemovalSummary:
+    """Entnahmen mit Grund: Summe je Grund plus die jüngsten Einträge."""
+    product = db.get(Product, product_id)
+    if product is None:
+        raise HTTPException(status.HTTP_404_NOT_FOUND, "Produkt nicht gefunden")
+
+    stats = [
+        RemovalStat(reason=RemovalReason(grund), quantity=v["quantity"], count=v["count"])
+        for grund, v in removal_stats(db, product_id).items()
+    ]
+    stats.sort(key=lambda s: s.quantity, reverse=True)
+
+    rows = (
+        db.query(Movement)
+        .filter(
+            Movement.product_id == product_id,
+            Movement.type == MovementType.out,
+            Movement.reason.isnot(None),
+        )
+        .order_by(Movement.created_at.desc())
+        .limit(50)
+        .all()
+    )
+    loc_names = {loc.id: loc.name for loc in db.query(Location).all()}
+    user_ids = {m.user_id for m in rows if m.user_id}
+    users = (
+        {u.id: u.username for u in db.query(User).filter(User.id.in_(user_ids)).all()}
+        if user_ids
+        else {}
+    )
+    history = [
+        RemovalHistoryItem(
+            reason=RemovalReason(m.reason),
+            quantity=m.quantity,
+            location_id=m.location_id,
+            location_name=loc_names.get(m.location_id),
+            note=m.note,
+            username=users.get(m.user_id),
+            created_at=m.created_at,
+        )
+        for m in rows
+    ]
+    return RemovalSummary(stats=stats, history=history)
+
+
 @router.get("/{product_id}/off", response_model=LookupResult)
 def off_vergleich(
     product_id: int,
@@ -123,8 +197,10 @@ def off_vergleich(
             "Dieser Artikel hat keinen Barcode – ohne den kann Open Food Facts nichts finden.",
         )
 
+    # Gegenstände zuerst in der allgemeinen Produkt-DB nachschlagen, Lebensmittel in OFF.
+    prefer = "object" if product_tracking(db, product) == "object" else None
     for code in codes:
-        suggestion = lookup_barcode(code)
+        suggestion = lookup_barcode(code, prefer=prefer)
         if suggestion:
             category = suggest_category(db, suggestion)
             return LookupResult(
@@ -183,6 +259,8 @@ def create_product(
             base_unit, display_unit_id = resolve_product_unit(db, payload.unit_id)
         except ConversionError as exc:
             raise HTTPException(status.HTTP_400_BAD_REQUEST, str(exc)) from exc
+    if payload.shop_id is not None and db.get(Shop, payload.shop_id) is None:
+        raise HTTPException(status.HTTP_404_NOT_FOUND, "Shop nicht gefunden")
     product = Product(
         barcode=payload.barcode or None,
         name=payload.name,
@@ -198,11 +276,17 @@ def create_product(
         min_stock=payload.min_stock,
         min_stock_unit_id=payload.min_stock_unit_id,
         min_stock_in_packages=bool(payload.min_stock_in_packages),
+        shop_id=payload.shop_id,
+        product_url=payload.product_url or None,
         source="manual",
     )
     db.add(product)
     db.flush()                      # product.id fuer den Gruppen-Code
     sync_group_code(db, product)
+    try:
+        apply_field_values(db, product, payload.field_values)
+    except FieldError as exc:
+        raise HTTPException(status.HTTP_400_BAD_REQUEST, str(exc)) from exc
     if product.image_url:
         # Gleich beim Anlegen holen. Schlaegt es fehl, entsteht kein Fehler:
         # Ein fehlendes Bild darf das Anlegen eines Artikels nicht verhindern.
@@ -224,6 +308,8 @@ def update_product(
         raise HTTPException(status.HTTP_404_NOT_FOUND, "Produkt nicht gefunden")
 
     data = payload.model_dump(exclude_unset=True)
+    # Feldwerte sind keine Spalte, sondern eigene Zeilen – getrennt behandeln.
+    field_values = data.pop("field_values", None)
     if "barcode" in data and data["barcode"]:
         clash = (
             db.query(Product)
@@ -234,6 +320,8 @@ def update_product(
             raise HTTPException(
                 status.HTTP_409_CONFLICT, "Ein anderes Produkt hat diesen Barcode bereits"
             )
+    if data.get("shop_id") is not None and db.get(Shop, data["shop_id"]) is None:
+        raise HTTPException(status.HTTP_404_NOT_FOUND, "Shop nicht gefunden")
     # Einheit: unit_id (falls gesetzt) bestimmt base_unit + Anzeigeeinheit.
     if "unit_id" in data:
         unit_id = data.pop("unit_id")
@@ -253,6 +341,11 @@ def update_product(
         data["date_precision"] = data["date_precision"].value
     for field, value in data.items():
         setattr(product, field, value)
+    if field_values is not None:
+        try:
+            apply_field_values(db, product, field_values)
+        except FieldError as exc:
+            raise HTTPException(status.HTTP_400_BAD_REQUEST, str(exc)) from exc
     # Gruppe oder Barcode koennen sich geaendert haben - Code nachziehen.
     sync_group_code(db, product)
     if "image_url" in data: