se adiciona @fields.on_change para ejecutar funcion cuando se cambian los varoles de algun attributo

FossilOrigin-Name: bee19b201f8c1a6b972c2a9abfe5fb57a558a67be6ecddce4f7f07b5b6980215

facho/model/fields/__init__.py

@@ -6,3 +6,15 @@ from .virtual import Virtual
 from .field import Field
 
 __all__ = [Attribute, Many2One, Model, Virtual, Field]
+
+def on_change(fields):
+    from functools import wraps
+    
+    def decorator(func):
+        setattr(func, 'on_changes', fields)
+
+        @wraps(func)
+        def wrapper(self, *arg, **kwargs):
+            return func(self, *arg, **kwargs)
+        return wrapper
+    return decorator

facho/model/fields/attribute.py

@@ -16,4 +16,6 @@ class Attribute(Field):
     def __set__(self, inst, value):
         assert self.name is not None
         self.value = value
+        
+        self._changed_field(inst, self.name, value)
         inst._set_attribute(self.name, self.attribute, value)

facho/model/fields/field.py

@@ -39,3 +39,8 @@ class Field:
             self._set_namespace(obj, self.namespace, inst.__namespace__)
             inst._fields[self.name] = obj
             return obj
+
+    def _changed_field(self, inst, name, value):
+        for fun in inst._on_change_fields[name]:
+            getattr(inst, fun)(name, value)
+            

facho/model/fields/function.py

@@ -31,4 +31,5 @@ class Function(Field):
 
     def __set__(self, inst, value):
         inst._set_field(self.name, self.field)
+        self._changed_field(inst, self.name, value)
         self.field.__set__(inst, value)

facho/model/fields/many2one.py

@@ -25,6 +25,7 @@ class Many2One(Field):
             setter(inst_model, value)
         else:
             inst_model._set_content(value)
-
+            
+        self._changed_field(inst, self.name, value)