Summary

We've been implementing KeinaSystem, an agricultural management system with Django/Next.js and Docker:
Completed:
- Day 1-2: Docker setup, Django configuration (REST, JWT, CORS, PostGIS, Japan timezone)
- Day 3: Data models (OfficialKyosaiField, OfficialChusankanField, Field with ManyToMany, Crop, Variety, Plan)
- Day 4: Import API endpoints for ODS files
- Day 5: init_crops command, serializers, ViewSets, summary/copy APIs
Current Issue:
- Day 6: PDF generation (/api/reports/kyosai/2025/) is returning HTTP 500 error
Next Step:
Debug the PDF generation error by checking backend container logs to see the specific exception.
Want me to check the container logs to diagnose the PDF 500 error?

backend/apps/reports/views.py

@@ -1,3 +1,88 @@
 from django.shortcuts import render
+from django.template.loader import render_to_string
+from django.http import HttpResponse
+from weasyprint import HTML
+from apps.fields.models import OfficialKyosaiField, OfficialChusankanField, Field
+from apps.plans.models import Plan
 
-# Create your views here.
+
+def generate_kyosai_pdf(request, year):
+    kyosai_fields = OfficialKyosaiField.objects.all()
+    
+    data = []
+    for kyosai in kyosai_fields:
+        related_fields = kyosai.fields.all()
+        plans = Plan.objects.filter(field__in=related_fields, year=year)
+        
+        crops = {}
+        total_area = 0
+        for plan in plans:
+            crop_name = plan.crop.name
+            if crop_name not in crops:
+                crops[crop_name] = {
+                    'name': crop_name,
+                    'variety': plan.variety.name,
+                    'count': 0
+                }
+            crops[crop_name]['count'] += 1
+            total_area += float(plan.field.area_tan)
+        
+        data.append({
+            'kyosai': kyosai,
+            'fields': related_fields,
+            'crops': list(crops.values()),
+            'total_area': total_area,
+            'field_count': related_fields.count()
+        })
+    
+    html_string = render_to_string('reports/kyosai_template.html', {
+        'year': year,
+        'data': data
+    })
+    
+    pdf = HTML(string=html_string).write_pdf()
+    
+    response = HttpResponse(pdf, content_type='application/pdf')
+    response['Content-Disposition'] = f'attachment; filename="kyosai_{year}.pdf"'
+    return response
+
+
+def generate_chusankan_pdf(request, year):
+    chusankan_fields = OfficialChusankanField.objects.all()
+    
+    data = []
+    for chusankan in chusankan_fields:
+        related_fields = chusankan.fields.all()
+        plans = Plan.objects.filter(field__in=related_fields, year=year)
+        
+        crops = {}
+        total_area = 0
+        for plan in plans:
+            crop_name = plan.crop.name
+            if crop_name not in crops:
+                crops[crop_name] = {
+                    'name': crop_name,
+                    'variety': plan.variety.name,
+                    'count': 0
+                }
+            crops[crop_name]['count'] += 1
+            total_area += float(plan.field.area_tan)
+        
+        data.append({
+            'chusankan': chusankan,
+            'fields': related_fields,
+            'crops': list(crops.values()),
+            'total_area': total_area,
+            'field_count': related_fields.count()
+        })
+    
+    html_string = render_to_string('reports/chusankan_template.html', {
+        'year': year,
+        'data': data
+    })
+    
+    pdf = HTML(string=html_string).write_pdf()
+    
+    response = HttpResponse(pdf, content_type='application/pdf')
+    response['Content-Disposition'] = f'attachment; filename="chusankan_{year}.pdf"'
+    return response