prvi kod za live uporabu

backend/modules/invoicing/serializers.py

@@ -0,0 +1,57 @@
+from django.db import transaction
+from core.serializers import BaseSerializer
+from rest_framework import serializers
+from .models import Invoice, InvoiceItem, InvoiceTransaction
+from .services import InvoiceService  #
+
+class InvoiceItemSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = InvoiceItem
+        fields = ['description', 'quantity', 'unit_price']
+
+class InvoiceSerializer(serializers.ModelSerializer):
+    items = InvoiceItemSerializer(many=True) # Nested lista stavki
+
+    class Meta:
+        model = Invoice
+        fields = ['invoice_number', 'client', 'due_date', 'status', 'items', 'amount']
+        read_only_fields = ['invoice_number', 'creator', 'status', 'amount']
+        extra_kwargs = {
+            'invoice_number': {'required': False, 'allow_null': True},
+            'creator': {'required': False, 'allow_null': True}
+        }
+
+    def create(self, validated_data):
+        """
+        Delegiramo stvaranje servisu i vraćamo instancu Invoice.
+        """
+        items = validated_data.pop('items', [])
+        # Servisu šaljemo items u validated_data kao što servis očekuje
+        validated_data['items'] = items
+
+        # Pokušavamo dohvatiti korisnika iz contexta (ako postoji)
+        request = self.context.get('request')
+        user = getattr(request, 'user', None)
+
+        # Pozivamo servis unutar transaction.atomic (servis već radi atomic, ali dodatno osiguranje nije štetno)
+        invoice = InvoiceService.create_full_invoice(user=user, **validated_data)
+        return invoice
+
+class InvoiceTransactionSerializer(BaseSerializer):
+    invoice = serializers.PrimaryKeyRelatedField(queryset=Invoice.objects.all())
+
+    def validate_amount(self, value):
+        request = self.context.get('request')
+        # Ako request ne postoji (npr. unit test), tretiramo ga kao običnog korisnika (sigurnost prvo)
+        user = getattr(request, 'user', None)
+        
+        # Ako user ne postoji ili nije staff, i iznos je <= 0 -> greška
+        if value <= 0 and (not user or not user.is_staff):
+            raise serializers.ValidationError("Iznos računa mora biti veći od 0.")
+        
+        return value
+    
+    class Meta:
+        model = InvoiceTransaction
+        fields = ['invoice', 'work_order', 'invoice_number', 'amount', 'payment_date', 'is_active']
+        read_only_fields = ['id', 'created_at', 'updated_at']