fache/fe/form: Quantity require UnidadesMedida.

FossilOrigin-Name: 675900c1251c0b7319dc8b395ce5d385297209197ce13b0ee5358b4ce619d9a8

facho/fe/data/dian/codelist/__init__.py

@@ -71,6 +71,7 @@ __all__ = ['TipoOrganizacion',
            'TipoAmbiente',
            'TipoDocumento',
            'TipoImpuesto',
+           'UnidadesMedida',
            'CodigoPrecioReferencia',
            'MediosPago',
            'RegimenFiscal',
@@ -98,3 +99,4 @@ Departamento = CodeList(path_for_codelist('Departamentos-2.1.gc'), 'code', 'name
 Paises = CodeList(path_for_codelist('Paises-2.1.gc'), 'code', 'name')
 TipoIdFiscal = CodeList(path_for_codelist('TipoIdFiscal-2.1.gc'), 'code', 'name')
 CodigoDescuento = CodeList(path_for_codelist('CodigoDescuento-2.1.gc'), 'code', 'name')
+UnidadesMedida = CodeList(path_for_codelist('UnidadesMedida-2.1.gc'), 'code', 'name')

facho/fe/form/__init__.py

@@ -113,8 +113,30 @@ class Amount:
         return round(self.amount, DECIMAL_PRECISION)
     
 
-class Quantity(Amount):
-    pass
+class Quantity:
+    
+    def __init__(self, val, code):
+        if not isinstance(val, int):
+            raise ValueError('val expected int')
+        if code not in codelist.UnidadesMedida:
+            raise ValueError("code [%s] not found" % (code))
+
+        self.value = val
+        self.code = code
+
+    def __mul__(self, other):
+        if isinstance(other, Amount):
+            return Amount(self.value) * other
+        return self.value * other
+
+    def __lt__(self, other):
+        if isinstance(other, Amount):
+            return Amount(self.value) < other
+        return self.value < other
+
+    def __str__(self):
+        return str(self.value)
+
 
 @dataclass
 class Item:

facho/fe/form_xml/invoice.py

@@ -523,7 +523,9 @@ class DIANInvoiceXML(fe.FeXML):
 
             line.set_element('./cac:Price/cbc:PriceAmount', invoice_line.price.amount, currencyID="COP")
             #DIAN 1.7.-2020: FBB04
-            line.set_element('./cac:Price/cbc:BaseQuantity', invoice_line.price.amount)
+            line.set_element('./cac:Price/cbc:BaseQuantity',
+                             invoice_line.quantity,
+                             unitCode=invoice_line.quantity.code)
 
 
     def attach_invoice(fexml, invoice):