FEAT: correccion IVA y Boletas, filtro categorias, vista previa evidencia y proveedor de servicios

expenses/forms.py

@@ -137,6 +137,7 @@ class ExpenseForm(forms.ModelForm):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.fields['project'].queryset = Project.objects.filter(parent__parent__isnull=False)
+        self.fields['category'].queryset = Category.objects.filter(children__isnull=True)
         if self.instance and self.instance.pk:
             try:
                 vlog = self.instance.vehicle_log
@@ -218,10 +219,11 @@ class ExpenseForm(forms.ModelForm):
             raise forms.ValidationError("Si desea registrar un nuevo proveedor, debe ingresar tanto el RUT como la Razón Social.")
 
         # Recalculate taxes via SIIService
-        amount = cleaned_data.get('amount_clp')
+        amount_clp = cleaned_data.get('amount_clp')
         tax_type = cleaned_data.get('tax_type')
-        if amount and tax_type:
-            tax_res = SIIService.calculate_taxes(amount, tax_type)
+        if amount_clp and amount_clp > 0 and tax_type:
+            tax_res = SIIService.calculate_taxes(amount_clp, tax_type)
+            cleaned_data['amount_clp'] = tax_res['net_amount']
             cleaned_data['tax_amount_clp'] = tax_res['tax_amount']
             cleaned_data['total_amount_clp'] = tax_res['total_amount']
 
@@ -229,7 +231,7 @@ class ExpenseForm(forms.ModelForm):
         vendor = cleaned_data.get('vendor')
         doc_num = cleaned_data.get('document_number')
         date_val = cleaned_data.get('date')
-        if amount and (vendor or doc_num):
+        if amount_clp and (vendor or doc_num):
             duplicates = SIIService.check_duplicate_expense(
                 expense_model=Expense,
                 vendor_id=vendor.id if vendor else None,
@@ -352,6 +354,10 @@ class ProjectForm(forms.ModelForm):
             'payment_method': forms.TextInput(attrs={'class': 'form-control', 'placeholder': 'Ej: 50% Anticipo / 50% Hito Final'}),
         }
 
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.fields['category'].queryset = Category.objects.filter(children__isnull=True)
+
 
 class ProjectPhaseForm(forms.ModelForm):
     due_date = forms.DateField(widget=forms.DateInput(attrs={'type': 'date', 'class': 'form-control'}), required=False, label="Fecha Pactada")
@@ -381,10 +387,11 @@ class CategoryForm(forms.ModelForm):
 class VendorForm(forms.ModelForm):
     class Meta:
         model = Vendor
-        fields = ['rut', 'name', 'business_line', 'bank', 'account_type', 'account_number', 'email', 'payment_terms']
+        fields = ['rut', 'name', 'provider_type', 'business_line', 'bank', 'account_type', 'account_number', 'email', 'payment_terms']
         widgets = {
             'rut': forms.TextInput(attrs={'class': 'form-control', 'required': 'required', 'pattern': '^[0-9]+-[0-9kK]$', 'title': 'Formato válido: 12345678-9'}),
             'name': forms.TextInput(attrs={'class': 'form-control', 'required': 'required'}),
+            'provider_type': forms.Select(attrs={'class': 'form-control'}),
             'email': forms.EmailInput(attrs={'class': 'form-control'}),
         }
 

expenses/migrations/0013_vendor_provider_type.py

@@ -0,0 +1,18 @@
+# Generated by Django 6.1 on 2026-09-09 17:34
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('expenses', '0012_alter_category_parent_alter_expense_project_and_more'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='vendor',
+            name='provider_type',
+            field=models.CharField(choices=[('BIENES', 'Proveedor de Bienes'), ('SERVICIOS', 'Proveedor de Servicios'), ('AMBOS', 'Bienes y Servicios')], default='BIENES', max_length=20, verbose_name='Clasificación'),
+        ),
+    ]

expenses/models.py

@@ -137,8 +137,14 @@ class Category(CatalogModel):
 
 
 class Vendor(TimeStampedModel):
+    PROVIDER_TYPE_CHOICES = [
+        ('BIENES', 'Proveedor de Bienes'),
+        ('SERVICIOS', 'Proveedor de Servicios'),
+        ('AMBOS', 'Bienes y Servicios'),
+    ]
     rut = models.CharField(max_length=15, unique=True, verbose_name="RUT Proveedor")
     name = models.CharField(max_length=200, verbose_name="Razón Social / Nombre")
+    provider_type = models.CharField(max_length=20, choices=PROVIDER_TYPE_CHOICES, default='BIENES', verbose_name="Clasificación")
     business_line = models.CharField(max_length=200, blank=True, null=True, verbose_name="Giro Comercial")
     
     bank = models.CharField(max_length=100, blank=True, null=True, verbose_name="Banco")

expenses/services/sii.py

@@ -186,17 +186,19 @@ class SIIService:
                     'description': f'Retención Honorarios ({tasa_porcentaje}%) - Vía API Externa'
                 }
                 
-            # 2. Fallback local (Bruto = Neto ingresado)
-            # Retencion = Bruto * 0.1525 (año 2026)
+            # 2. Fallback local (Neto ingresado = Líquido)
+            # Bruto = Líquido / (1 - 0.1525)
+            # Retencion = Bruto - Líquido
             tasa = Decimal('0.1525')
-            tax_amount = (net_amount_clp * tasa).quantize(Decimal('1'), rounding=ROUND_HALF_UP)
-            liquid_amount = net_amount_clp - tax_amount
+            liquid_amount = net_amount_clp
+            bruto_amount = (liquid_amount / (Decimal('1') - tasa)).quantize(Decimal('1'), rounding=ROUND_HALF_UP)
+            tax_amount = bruto_amount - liquid_amount
             return {
                 'tax_type': 'HONORARIOS_13_75',
                 'net_amount': liquid_amount,
                 'tax_rate_percent': Decimal('15.25'),
                 'tax_amount': tax_amount,
-                'total_amount': net_amount_clp,
+                'total_amount': bruto_amount,
                 'description': 'Retención Boleta de Honorarios 15.25%'
             }
         else: