在庫管理機能 Phase 1 実装（apps/materials + フロントエンド）

Backend: - apps/materials 新規作成（Material, FertilizerProfile, PesticideProfile, StockTransaction） - 資材マスタ CRUD API（/api/materials/materials/） - 入出庫履歴 API（/api/materials/stock-transactions/） - 在庫集計 API（/api/materials/stock-summary/） - 既存 Fertilizer に material OneToOneField 追加（0005マイグレーション、データ移行込み） Frontend: - /materials: 在庫一覧画面（タブフィルタ、履歴展開、入出庫モーダル） - /materials/masters: 資材マスタ管理（肥料/農薬/その他タブ、インライン編集） - Navbar に「在庫管理」メニュー追加 - Material/StockTransaction/StockSummary 型定義追加 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-14 15:42:47 +09:00
parent 67d4197b7f
commit 497bc87c24
20 changed files with 2344 additions and 1 deletions
--- a/backend/apps/materials/views.py
+++ b/backend/apps/materials/views.py
@@ -0,0 +1,134 @@
+from decimal import Decimal
+
+from rest_framework import generics, status, viewsets
+from rest_framework.permissions import IsAuthenticated
+from rest_framework.response import Response
+
+from .models import Material, StockTransaction
+from .serializers import (
+    MaterialReadSerializer,
+    MaterialWriteSerializer,
+    StockSummarySerializer,
+    StockTransactionSerializer,
+)
+
+
+class MaterialViewSet(viewsets.ModelViewSet):
+    """資材マスタ CRUD"""
+
+    permission_classes = [IsAuthenticated]
+
+    def get_queryset(self):
+        queryset = Material.objects.select_related(
+            'fertilizer_profile',
+            'pesticide_profile',
+        ).prefetch_related('stock_transactions')
+
+        material_type = self.request.query_params.get('material_type')
+        if material_type:
+            queryset = queryset.filter(material_type=material_type)
+
+        active = self.request.query_params.get('active')
+        if active is not None:
+            queryset = queryset.filter(is_active=active.lower() == 'true')
+
+        return queryset
+
+    def get_serializer_class(self):
+        if self.action in ['create', 'update', 'partial_update']:
+            return MaterialWriteSerializer
+        return MaterialReadSerializer
+
+    def destroy(self, request, *args, **kwargs):
+        instance = self.get_object()
+        if instance.stock_transactions.exists():
+            return Response(
+                {'detail': 'この資材には入出庫履歴があるため削除できません。無効化してください。'},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+        return super().destroy(request, *args, **kwargs)
+
+
+class StockTransactionViewSet(viewsets.ModelViewSet):
+    """入出庫履歴 CRUD"""
+
+    serializer_class = StockTransactionSerializer
+    permission_classes = [IsAuthenticated]
+    http_method_names = ['get', 'post', 'delete', 'head', 'options']
+
+    def get_queryset(self):
+        queryset = StockTransaction.objects.select_related('material')
+
+        material_id = self.request.query_params.get('material_id')
+        if material_id:
+            queryset = queryset.filter(material_id=material_id)
+
+        material_type = self.request.query_params.get('material_type')
+        if material_type:
+            queryset = queryset.filter(material__material_type=material_type)
+
+        date_from = self.request.query_params.get('date_from')
+        if date_from:
+            queryset = queryset.filter(occurred_on__gte=date_from)
+
+        date_to = self.request.query_params.get('date_to')
+        if date_to:
+            queryset = queryset.filter(occurred_on__lte=date_to)
+
+        return queryset
+
+
+class StockSummaryView(generics.ListAPIView):
+    """在庫集計一覧"""
+
+    serializer_class = StockSummarySerializer
+    permission_classes = [IsAuthenticated]
+
+    def get_queryset(self):
+        return Material.objects.none()
+
+    def list(self, request, *args, **kwargs):
+        queryset = Material.objects.prefetch_related('stock_transactions').order_by(
+            'material_type',
+            'name',
+        )
+
+        material_type = request.query_params.get('material_type')
+        if material_type:
+            queryset = queryset.filter(material_type=material_type)
+
+        active = request.query_params.get('active')
+        if active is not None:
+            queryset = queryset.filter(is_active=active.lower() == 'true')
+
+        results = []
+        for material in queryset:
+            transactions = list(material.stock_transactions.all())
+            increase = sum(
+                txn.quantity
+                for txn in transactions
+                if txn.transaction_type in StockTransaction.INCREASE_TYPES
+            )
+            decrease = sum(
+                txn.quantity
+                for txn in transactions
+                if txn.transaction_type in StockTransaction.DECREASE_TYPES
+            )
+            last_date = max((txn.occurred_on for txn in transactions), default=None)
+            results.append(
+                {
+                    'material_id': material.id,
+                    'name': material.name,
+                    'material_type': material.material_type,
+                    'material_type_display': material.get_material_type_display(),
+                    'maker': material.maker,
+                    'stock_unit': material.stock_unit,
+                    'stock_unit_display': material.get_stock_unit_display(),
+                    'is_active': material.is_active,
+                    'current_stock': increase - decrease if transactions else Decimal('0'),
+                    'last_transaction_date': last_date,
+                }
+            )
+
+        serializer = self.get_serializer(results, many=True)
+        return Response(serializer.data)