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>
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Akira
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backend/apps/materials/serializers.py
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212
backend/apps/materials/serializers.py
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from decimal import Decimal
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from django.db import transaction
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from rest_framework import serializers
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from .models import (
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FertilizerProfile,
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Material,
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PesticideProfile,
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StockTransaction,
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)
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class FertilizerProfileSerializer(serializers.ModelSerializer):
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class Meta:
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model = FertilizerProfile
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fields = ['capacity_kg', 'nitrogen_pct', 'phosphorus_pct', 'potassium_pct']
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class PesticideProfileSerializer(serializers.ModelSerializer):
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class Meta:
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model = PesticideProfile
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fields = [
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'registration_no',
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'formulation',
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'usage_unit',
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'dilution_ratio',
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'active_ingredient',
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'category',
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]
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class MaterialReadSerializer(serializers.ModelSerializer):
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material_type_display = serializers.CharField(
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source='get_material_type_display',
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read_only=True,
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)
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stock_unit_display = serializers.CharField(
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source='get_stock_unit_display',
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read_only=True,
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)
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fertilizer_profile = FertilizerProfileSerializer(read_only=True)
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pesticide_profile = PesticideProfileSerializer(read_only=True)
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current_stock = serializers.SerializerMethodField()
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class Meta:
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model = Material
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fields = [
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'id',
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'name',
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'material_type',
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'material_type_display',
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'maker',
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'stock_unit',
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'stock_unit_display',
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'is_active',
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'notes',
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'fertilizer_profile',
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'pesticide_profile',
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'current_stock',
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'created_at',
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'updated_at',
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]
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def get_current_stock(self, obj):
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transactions = list(obj.stock_transactions.all())
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increase = sum(
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transaction.quantity
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for transaction in transactions
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if transaction.transaction_type in StockTransaction.INCREASE_TYPES
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)
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decrease = sum(
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transaction.quantity
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for transaction in transactions
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if transaction.transaction_type in StockTransaction.DECREASE_TYPES
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)
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return increase - decrease
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class MaterialWriteSerializer(serializers.ModelSerializer):
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fertilizer_profile = FertilizerProfileSerializer(required=False, allow_null=True)
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pesticide_profile = PesticideProfileSerializer(required=False, allow_null=True)
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class Meta:
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model = Material
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fields = [
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'id',
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'name',
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'material_type',
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'maker',
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'stock_unit',
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'is_active',
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'notes',
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'fertilizer_profile',
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'pesticide_profile',
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]
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def validate(self, attrs):
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material_type = attrs.get('material_type')
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if self.instance is not None and material_type is None:
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material_type = self.instance.material_type
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fertilizer_profile = attrs.get('fertilizer_profile')
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pesticide_profile = attrs.get('pesticide_profile')
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if material_type == Material.MaterialType.FERTILIZER and pesticide_profile:
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raise serializers.ValidationError(
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{'pesticide_profile': '肥料には農薬詳細を設定できません。'}
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)
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if material_type == Material.MaterialType.PESTICIDE and fertilizer_profile:
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raise serializers.ValidationError(
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{'fertilizer_profile': '農薬には肥料詳細を設定できません。'}
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)
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if (
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material_type in {Material.MaterialType.SEEDLING, Material.MaterialType.OTHER}
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and (fertilizer_profile or pesticide_profile)
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):
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raise serializers.ValidationError(
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'種苗・その他には詳細プロファイルを設定できません。'
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)
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return attrs
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@transaction.atomic
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def create(self, validated_data):
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fertilizer_profile_data = validated_data.pop('fertilizer_profile', None)
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pesticide_profile_data = validated_data.pop('pesticide_profile', None)
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material = Material.objects.create(**validated_data)
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self._save_profiles(material, fertilizer_profile_data, pesticide_profile_data)
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return material
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@transaction.atomic
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def update(self, instance, validated_data):
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fertilizer_profile_data = validated_data.pop('fertilizer_profile', None)
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pesticide_profile_data = validated_data.pop('pesticide_profile', None)
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for attr, value in validated_data.items():
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setattr(instance, attr, value)
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instance.save()
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self._save_profiles(instance, fertilizer_profile_data, pesticide_profile_data)
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return instance
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def to_representation(self, instance):
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return MaterialReadSerializer(instance, context=self.context).data
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def _save_profiles(self, material, fertilizer_profile_data, pesticide_profile_data):
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if material.material_type == Material.MaterialType.FERTILIZER:
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if fertilizer_profile_data is not None:
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profile, _ = FertilizerProfile.objects.get_or_create(material=material)
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for attr, value in fertilizer_profile_data.items():
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setattr(profile, attr, value)
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profile.save()
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PesticideProfile.objects.filter(material=material).delete()
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return
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if material.material_type == Material.MaterialType.PESTICIDE:
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if pesticide_profile_data is not None:
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profile, _ = PesticideProfile.objects.get_or_create(material=material)
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for attr, value in pesticide_profile_data.items():
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setattr(profile, attr, value)
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profile.save()
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FertilizerProfile.objects.filter(material=material).delete()
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return
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FertilizerProfile.objects.filter(material=material).delete()
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PesticideProfile.objects.filter(material=material).delete()
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class StockTransactionSerializer(serializers.ModelSerializer):
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material_name = serializers.CharField(source='material.name', read_only=True)
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material_type = serializers.CharField(source='material.material_type', read_only=True)
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stock_unit = serializers.CharField(source='material.stock_unit', read_only=True)
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stock_unit_display = serializers.CharField(
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source='material.get_stock_unit_display',
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read_only=True,
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)
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transaction_type_display = serializers.CharField(
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source='get_transaction_type_display',
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read_only=True,
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)
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class Meta:
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model = StockTransaction
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fields = [
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'id',
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'material',
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'material_name',
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'material_type',
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'transaction_type',
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'transaction_type_display',
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'quantity',
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'stock_unit',
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'stock_unit_display',
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'occurred_on',
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'note',
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'created_at',
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]
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read_only_fields = ['created_at']
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class StockSummarySerializer(serializers.Serializer):
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material_id = serializers.IntegerField()
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name = serializers.CharField()
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material_type = serializers.CharField()
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material_type_display = serializers.CharField()
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maker = serializers.CharField()
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stock_unit = serializers.CharField()
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stock_unit_display = serializers.CharField()
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is_active = serializers.BooleanField()
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current_stock = serializers.DecimalField(max_digits=10, decimal_places=3)
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last_transaction_date = serializers.DateField(allow_null=True)
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