466eef128c
施肥計画の圃場を配置場所単位でグループ化し、グループ×肥料の集計表を 表示・PDF出力できる機能を追加。 - Backend: DistributionPlan/Group/GroupField モデル (migration 0003) - API: GET/POST/PUT/DELETE/PDF (/api/fertilizer/distribution/) - Frontend: 一覧・新規作成・編集画面 (/distribution) - Navbar に分配計画メニューを追加 - 集計プレビューはクライアントサイド計算（API不要） Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
325 lines
13 KiB
Python
325 lines
13 KiB
Python
from decimal import Decimal, InvalidOperation
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from django.http import HttpResponse
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from django.template.loader import render_to_string
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from rest_framework import viewsets, status
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from rest_framework.decorators import action
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from rest_framework.permissions import IsAuthenticated
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from rest_framework.response import Response
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from rest_framework.views import APIView
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from weasyprint import HTML
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from apps.fields.models import Field
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from apps.plans.models import Plan, Variety
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from .models import Fertilizer, FertilizationPlan, DistributionPlan
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from .serializers import (
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FertilizerSerializer,
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FertilizationPlanSerializer,
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FertilizationPlanWriteSerializer,
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DistributionPlanListSerializer,
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DistributionPlanReadSerializer,
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DistributionPlanWriteSerializer,
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)
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class FertilizerViewSet(viewsets.ModelViewSet):
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permission_classes = [IsAuthenticated]
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queryset = Fertilizer.objects.all()
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serializer_class = FertilizerSerializer
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class FertilizationPlanViewSet(viewsets.ModelViewSet):
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permission_classes = [IsAuthenticated]
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def get_queryset(self):
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qs = FertilizationPlan.objects.select_related('variety', 'variety__crop').prefetch_related(
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'entries', 'entries__field', 'entries__fertilizer'
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)
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year = self.request.query_params.get('year')
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if year:
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qs = qs.filter(year=year)
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return qs
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def get_serializer_class(self):
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if self.action in ['create', 'update', 'partial_update']:
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return FertilizationPlanWriteSerializer
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return FertilizationPlanSerializer
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@action(detail=True, methods=['get'])
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def pdf(self, request, pk=None):
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plan = self.get_object()
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entries = plan.entries.select_related('field', 'fertilizer').order_by(
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'field__display_order', 'field__id', 'fertilizer__name'
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)
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# 圃場・肥料の一覧を整理
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fields_map = {}
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fertilizers_map = {}
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for entry in entries:
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fields_map[entry.field_id] = entry.field
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fertilizers_map[entry.fertilizer_id] = entry.fertilizer
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fields = sorted(fields_map.values(), key=lambda f: (f.display_order, f.id))
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fertilizers = sorted(fertilizers_map.values(), key=lambda f: f.name)
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# マトリクスデータ生成
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matrix = {}
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for entry in entries:
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matrix[(entry.field_id, entry.fertilizer_id)] = entry.bags
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rows = []
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for field in fields:
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cells = [matrix.get((field.id, fert.id), '') for fert in fertilizers]
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total = sum(v for v in cells if v != '')
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rows.append({
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'field': field,
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'cells': cells,
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'total': total,
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})
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# 肥料ごとの合計
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fert_totals = []
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for fert in fertilizers:
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total = sum(
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matrix.get((field.id, fert.id), Decimal('0'))
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for field in fields
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)
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fert_totals.append(total)
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context = {
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'plan': plan,
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'fertilizers': fertilizers,
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'rows': rows,
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'fert_totals': fert_totals,
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'grand_total': sum(fert_totals),
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}
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html_string = render_to_string('fertilizer/pdf.html', context)
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pdf_file = HTML(string=html_string).write_pdf()
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response = HttpResponse(pdf_file, content_type='application/pdf')
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response['Content-Disposition'] = f'attachment; filename="fertilization_{plan.year}_{plan.id}.pdf"'
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return response
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class CandidateFieldsView(APIView):
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"""作付け計画から圃場候補を返す"""
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permission_classes = [IsAuthenticated]
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def get(self, request):
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year = request.query_params.get('year')
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variety_id = request.query_params.get('variety_id')
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if not year or not variety_id:
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return Response({'error': 'year と variety_id が必要です'}, status=status.HTTP_400_BAD_REQUEST)
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field_ids = Plan.objects.filter(
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year=year, variety_id=variety_id
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).values_list('field_id', flat=True)
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fields = Field.objects.filter(id__in=field_ids).order_by('display_order', 'id')
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data = [
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{
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'id': f.id,
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'name': f.name,
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'area_tan': str(f.area_tan),
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'area_m2': f.area_m2,
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'group_name': f.group_name,
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}
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for f in fields
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]
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return Response(data)
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class CalculateView(APIView):
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"""自動計算（保存しない）"""
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permission_classes = [IsAuthenticated]
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def post(self, request):
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method = request.data.get('method') # 'nitrogen' | 'even' | 'per_tan'
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param = request.data.get('param') # 数値パラメータ
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fertilizer_id = request.data.get('fertilizer_id')
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field_ids = request.data.get('field_ids', [])
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if not method or param is None or not field_ids:
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return Response({'error': 'method, param, field_ids が必要です'}, status=status.HTTP_400_BAD_REQUEST)
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try:
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param = Decimal(str(param))
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except InvalidOperation:
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return Response({'error': 'param は数値で指定してください'}, status=status.HTTP_400_BAD_REQUEST)
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fields = Field.objects.filter(id__in=field_ids)
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if not fields.exists():
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return Response({'error': '圃場が見つかりません'}, status=status.HTTP_400_BAD_REQUEST)
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results = []
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if method == 'per_tan':
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# 反当袋数配分: S = Sa × A
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for field in fields:
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area = Decimal(str(field.area_tan))
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bags = (param * area).quantize(Decimal('0.01'))
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results.append({'field_id': field.id, 'bags': float(bags)})
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elif method == 'even':
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# 在庫/指定数量均等配分: S = (SS / Sum(A)) × A
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total_area = sum(Decimal(str(f.area_tan)) for f in fields)
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if total_area == 0:
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return Response({'error': '圃場の面積が0です'}, status=status.HTTP_400_BAD_REQUEST)
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for field in fields:
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area = Decimal(str(field.area_tan))
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bags = (param * area / total_area).quantize(Decimal('0.01'))
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results.append({'field_id': field.id, 'bags': float(bags)})
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elif method == 'nitrogen':
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# 反当チッソ成分量配分: S = (Nr / (C × Nd/100)) × A
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if not fertilizer_id:
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return Response({'error': 'nitrogen 方式には fertilizer_id が必要です'}, status=status.HTTP_400_BAD_REQUEST)
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try:
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fertilizer = Fertilizer.objects.get(id=fertilizer_id)
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except Fertilizer.DoesNotExist:
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return Response({'error': '肥料が見つかりません'}, status=status.HTTP_404_NOT_FOUND)
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if not fertilizer.capacity_kg or not fertilizer.nitrogen_pct:
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return Response(
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{'error': 'この肥料には1袋重量(kg)と窒素含有率(%)の登録が必要です'},
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status=status.HTTP_400_BAD_REQUEST
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)
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c = Decimal(str(fertilizer.capacity_kg))
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nd = Decimal(str(fertilizer.nitrogen_pct))
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# 1袋あたりの窒素量 (kg)
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nc = c * nd / Decimal('100')
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if nc == 0:
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return Response({'error': '窒素含有量が0のため計算できません'}, status=status.HTTP_400_BAD_REQUEST)
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for field in fields:
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area = Decimal(str(field.area_tan))
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bags = (param / nc * area).quantize(Decimal('0.01'))
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results.append({'field_id': field.id, 'bags': float(bags)})
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else:
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return Response({'error': 'method は nitrogen / even / per_tan のいずれかです'}, status=status.HTTP_400_BAD_REQUEST)
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return Response(results)
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class DistributionPlanViewSet(viewsets.ModelViewSet):
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permission_classes = [IsAuthenticated]
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def get_queryset(self):
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qs = DistributionPlan.objects.select_related(
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'fertilization_plan', 'fertilization_plan__variety', 'fertilization_plan__variety__crop'
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).prefetch_related(
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'groups', 'groups__field_assignments', 'groups__field_assignments__field',
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'fertilization_plan__entries', 'fertilization_plan__entries__field',
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'fertilization_plan__entries__fertilizer',
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'distributiongroupfield_set',
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)
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year = self.request.query_params.get('year')
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if year:
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qs = qs.filter(fertilization_plan__year=year)
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return qs
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def get_serializer_class(self):
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if self.action in ['create', 'update', 'partial_update']:
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return DistributionPlanWriteSerializer
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if self.action == 'list':
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return DistributionPlanListSerializer
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return DistributionPlanReadSerializer
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@action(detail=True, methods=['get'])
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def pdf(self, request, pk=None):
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dist_plan = self.get_object()
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fert_plan = dist_plan.fertilization_plan
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# 施肥計画の肥料一覧（名前順）
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fert_ids = fert_plan.entries.values_list('fertilizer_id', flat=True).distinct()
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fertilizers = sorted(
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Fertilizer.objects.filter(id__in=fert_ids),
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key=lambda f: f.name
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)
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# entries を (field_id, fertilizer_id) → bags のマトリクスに変換
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entry_map = {}
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for e in fert_plan.entries.all():
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entry_map[(e.field_id, e.fertilizer_id)] = e.bags
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# グループ行の構築
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groups = dist_plan.groups.prefetch_related('field_assignments__field').all()
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group_rows = []
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for group in groups:
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fields_in_group = [
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a.field for a in group.field_assignments.select_related('field').order_by('field__display_order', 'field__id')
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]
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# グループ合計（肥料ごと）
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group_totals = []
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for fert in fertilizers:
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total = sum(
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entry_map.get((f.id, fert.id), Decimal('0'))
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for f in fields_in_group
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)
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group_totals.append(total)
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group_row_total = sum(group_totals)
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# 圃場サブ行
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field_rows = []
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for field in fields_in_group:
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cells = [entry_map.get((field.id, fert.id), '') for fert in fertilizers]
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row_total = sum(v for v in cells if v != '')
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field_rows.append({'field': field, 'cells': cells, 'total': row_total})
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group_rows.append({
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'name': group.name,
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'totals': group_totals,
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'row_total': group_row_total,
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'field_rows': field_rows,
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})
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# 未割り当て圃場
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assigned_ids = dist_plan.distributiongroupfield_set.values_list('field_id', flat=True)
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plan_field_ids = fert_plan.entries.values_list('field_id', flat=True).distinct()
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unassigned_fields = Field.objects.filter(
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id__in=plan_field_ids
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).exclude(id__in=assigned_ids).order_by('display_order', 'id')
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unassigned_rows = []
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if unassigned_fields.exists():
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ua_totals = []
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for fert in fertilizers:
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total = sum(
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entry_map.get((f.id, fert.id), Decimal('0'))
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for f in unassigned_fields
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)
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ua_totals.append(total)
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unassigned_rows = [{
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'name': '未割り当て',
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'totals': ua_totals,
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'row_total': sum(ua_totals),
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'field_rows': [
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{
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'field': f,
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'cells': [entry_map.get((f.id, fert.id), '') for fert in fertilizers],
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'total': sum(entry_map.get((f.id, fert.id), Decimal('0')) for fert in fertilizers),
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}
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for f in unassigned_fields
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],
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}]
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all_group_rows = group_rows + unassigned_rows
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fert_totals = [
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sum(r['totals'][i] for r in all_group_rows)
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for i in range(len(fertilizers))
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]
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context = {
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'dist_plan': dist_plan,
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'fert_plan': fert_plan,
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'fertilizers': fertilizers,
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'group_rows': all_group_rows,
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'fert_totals': fert_totals,
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'grand_total': sum(fert_totals),
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}
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html_string = render_to_string('fertilizer/distribution_pdf.html', context)
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pdf_file = HTML(string=html_string).write_pdf()
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response = HttpResponse(pdf_file, content_type='application/pdf')
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response['Content-Disposition'] = (
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f'attachment; filename="distribution_{fert_plan.year}_{dist_plan.id}.pdf"'
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)
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return response
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