order uchun crud apilar qoshildi

core/apps/dashboard/serializers/order.py

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+# django 
+from django.db import transaction
+from django.core.files.base import ContentFile
+
+# rest framework
+from rest_framework import serializers
+
+# orders 
+from core.apps.orders.models import Order, OrderItem
+from core.apps.orders.serializers.order_item import OrderItemSerializer
+# shared
+from core.apps.shared.models import Factory
+# accounts
+from core.apps.accounts.models import User
+# services
+from core.services.generate_pdf import generate_order_pdf
+from core.services.send_telegram_msg import send_to_telegram
+
+
+class AdminOrderCreateSerializer(serializers.Serializer):
+    factory_id = serializers.IntegerField()
+    paid_price = serializers.DecimalField(max_digits=15, decimal_places=2)
+    total_price = serializers.DecimalField(max_digits=15, decimal_places=2)
+    advance = serializers.FloatField()
+    employee_name = serializers.CharField()
+    user_id = serializers.IntegerField()
+    items = OrderItemSerializer(many=True)
+
+    def validate(self, data):
+        user = User.objects.filter(id=data['user_id']).first()
+        if not user:
+            raise serializers.ValidationError({"user": "user not found"})
+        factory = Factory.objects.filter(id=data['factory_id']).first()
+        if not factory:
+            raise serializers.ValidationError({"factory_id": "Factory not found"})
+        data['factory'] = factory
+        data['user'] = user
+        return data
+    
+    def create(self, validated_data):
+        with transaction.atomic():
+            user = validated_data.get('user')
+            order = Order.objects.create(
+                factory=validated_data.get('factory'),
+                paid_price=validated_data.get('paid_price'),
+                advance=validated_data.get('advance'),
+                employee_name=validated_data.get('employee_name'),
+                total_price=validated_data.get('total_price'),
+                user=user
+            )
+            order_items = []
+            for order_item in validated_data.get('items'):
+                order_items.append(OrderItem(
+                    product=order_item.get('product'),
+                    order=order,
+                    quantity=order_item.get('quantity'),
+                    total_price=order_item.get('total_price'),
+                ))
+            OrderItem.objects.bulk_create(order_items)
+
+            # generate pdf file
+            pdf_buffer = generate_order_pdf(order.id)
+
+            file_name = f"order_{order.id}.pdf"
+            order.file.save(file_name, ContentFile(pdf_buffer.getvalue()), save=False)
+
+            order.save(update_fields=["file"]) 
+
+            # send to telegram 
+            send_to_telegram(user.telegram_id, order.id)
+            return order
+        
+    
+class AdminOrderListSerializer(serializers.ModelSerializer):
+    order_items = OrderItemSerializer(many=True)
+    factory = serializers.SerializerMethodField(method_name='get_factory')
+    user = serializers.SerializerMethodField(method_name='get_user')
+
+    class Meta:
+        model = Order
+        fields = [
+            'id', 'factory', 'total_price', 'paid_price', 'advance', 'employee_name',
+            'overdue_price', 'order_items', 'file', 'user'
+        ]
+
+    def get_user(self, obj):
+        return {
+            "id": obj.user.id,
+            "first_name": obj.user.first_name,
+            "last_name": obj.user.last_name,
+        }
+
+    def get_factory(self, obj):
+        return {
+            'id': obj.factory.id,
+            'name': obj.factory.name,
+        }
+
+
+class AdminOrderUpdateSerializer(serializers.Serializer):
+    factory_id = serializers.IntegerField()
+    paid_price = serializers.DecimalField(max_digits=15, decimal_places=2)
+    total_price = serializers.DecimalField(max_digits=15, decimal_places=2)
+    advance = serializers.FloatField()
+    employee_name = serializers.CharField()
+    user_id = serializers.IntegerField()
+    items = OrderItemSerializer(many=True)
+
+    def validate(self, data):
+        user = User.objects.filter(id=data['user_id']).first()
+        if not user:
+            raise serializers.ValidationError({"user": "user not found"})
+        
+        factory = Factory.objects.filter(id=data['factory_id']).first()
+        if not factory:
+            raise serializers.ValidationError({"factory_id": "Factory not found"})
+        
+        data['factory'] = factory
+        data['user'] = user
+        return data
+    
+    def update(self, instance, validated_data):
+        with transaction.atomic():
+            instance.factory = validated_data.get('factory', instance.factory)
+            instance.paid_price = validated_data.get('paid_price', instance.paid_price)
+            instance.total_price = validated_data.get('total_price', instance.total_price)
+            instance.advance = validated_data.get('advance', instance.advance)
+            instance.employee_name = validated_data.get('employee_name', instance.employee_name)
+            instance.user = validated_data.get('user', instance.user)
+            instance.save()
+
+            OrderItem.objects.filter(order=instance).delete()
+
+            order_items = []
+            for order_item_data in validated_data.get('items', []):
+                order_items.append(OrderItem(
+                    product=order_item_data.get('product'),
+                    order=instance,
+                    quantity=order_item_data.get('quantity'),
+                    total_price=order_item_data.get('total_price'),
+                ))
+            
+            if order_items:
+                OrderItem.objects.bulk_create(order_items)
+
+            return instance
+