fields.Function manejan default

FossilOrigin-Name: ec954ac9253429b99095fbcce443a2691f516f603282aec1ee59c4b7cbbd6c4a

facho/model/fields/attribute.py

@@ -1,8 +1,8 @@
 from .field import Field
 
 class Attribute(Field):
-    def __init__(self, tag, default=None):
-        self.tag = tag
+    def __init__(self, name, default=None):
+        self.attribute = name
         self.value = default
         self.default = default
 
@@ -16,4 +16,4 @@ class Attribute(Field):
     def __set__(self, inst, value):
         assert self.name is not None
         self.value = value
-        inst._xml_attributes[self.name] = (self.tag, value)
+        inst._set_attribute(self.name, self.attribute, value)

facho/model/fields/function.py

@@ -2,9 +2,14 @@ from .field import Field
 from .model import Model
 
 class Function(Field):
-    def __init__(self, field, getter=None):
+    """
+    Permite modificar el modelo cuando se intenta,
+    obtener el valor de este campo.
+    """
+    def __init__(self, field, getter=None, default=None):
         self.field = field
         self.getter = getter
+        self.default = default
 
     def __get__(self, inst, cls):
         if inst is None:
@@ -14,8 +19,7 @@ class Function(Field):
         # si se indica `field` se adiciona
         # como campo del modelo, esto es
         # que se serializa a xml
-        self.field.name = self.name
-        inst._fields[self.name] = self.field
+        inst._set_field(self.name, self.field)
 
         if self.getter is not None:
             value = self._call(inst, self.getter, self.name, self.field)
@@ -24,3 +28,7 @@ class Function(Field):
                 self.field.__set__(inst, value)
 
         return self.field
+
+    def __set__(self, inst, value):
+        inst._set_field(self.name, self.field)
+        self.field.__set__(inst, value)