Initial commit - Zhangmenu Django project

A menu management application built with Django, featuring:
- Dish management with cover images
- Order system with party dates and participants
- REST API with Django REST Framework
- Bootstrap-styled frontend

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

menu/serializers.py

@@ -0,0 +1,70 @@
+from django.db.models import Count
+from rest_framework import serializers
+from .models import Dish, DishCategory, Order
+
+
+class DishCategorySerializer(serializers.ModelSerializer):
+    """分类序列化器"""
+    dish_count = serializers.IntegerField(read_only=True)
+
+    class Meta:
+        model = DishCategory
+        fields = ['id', 'name', 'icon', 'order', 'dish_count']
+
+
+class DishSerializer(serializers.ModelSerializer):
+    """菜品序列化器"""
+    category_name = serializers.CharField(source='category.name', read_only=True)
+    category_id = serializers.IntegerField(write_only=True, required=False, allow_null=True)
+
+    class Meta:
+        model = Dish
+        fields = ['id', 'name', 'category', 'category_name', 'category_id',
+                  'cover_image', 'description', 'ingredients', 'view_count',
+                  'created_at', 'updated_at']
+        read_only_fields = ['created_at', 'updated_at', 'view_count']
+
+
+class OrderSerializer(serializers.ModelSerializer):
+    """订单序列化器"""
+    dishes_detail = DishSerializer(source='dishes', many=True, read_only=True)
+    ingredients_summary = serializers.SerializerMethodField()
+    dish_ids = serializers.ListField(
+        child=serializers.IntegerField(),
+        write_only=True,
+        required=False
+    )
+
+    class Meta:
+        model = Order
+        fields = ['id', 'name', 'dishes', 'dishes_detail', 'dish_ids',
+                  'status', 'party_date', 'participants',
+                  'created_at', 'completed_at', 'note', 'ingredients_summary', 'images']
+        read_only_fields = ['created_at', 'completed_at']
+        extra_kwargs = {
+            'dishes': {'required': False}
+        }
+
+    def get_ingredients_summary(self, obj):
+        return obj.get_ingredients_summary()
+
+    def validate_dishes(self, value):
+        return value
+
+    def create(self, validated_data):
+        dish_ids = validated_data.pop('dish_ids', [])
+        order = Order.objects.create(**validated_data)
+        if dish_ids:
+            dishes = Dish.objects.filter(id__in=dish_ids)
+            order.dishes.set(dishes)
+        return order
+
+    def update(self, instance, validated_data):
+        dish_ids = validated_data.pop('dish_ids', None)
+        for attr, value in validated_data.items():
+            setattr(instance, attr, value)
+        instance.save()
+        if dish_ids is not None:
+            dishes = Dish.objects.filter(id__in=dish_ids)
+            instance.dishes.set(dishes)
+        return instance