se adiciona fields.One2Many

FossilOrigin-Name: 94c1cca50451a46c417d925b27fdd53d8199b8dc58783e600c84179eac666a36

facho/model/fields/one2many.py

@@ -0,0 +1,25 @@
+from .field import Field
+
+class BoundModel:
+    def __init__(self, creator):
+        self.creator = creator
+
+    def create(self):
+        return self.creator()
+
+class One2Many(Field):
+    def __init__(self, model, name=None, namespace=None, default=None):
+        self.model = model
+        self.field_name = name
+        self.namespace = namespace
+        self.default = default
+        self.count_relations = 0
+        
+    def __get__(self, inst, cls):
+        assert self.name is not None
+        def creator():
+            attribute = '%s_%d' % (self.name, self.count_relations)
+            self.count_relations += 1
+            return self._create_model(inst, name=self.field_name, model=self.model, attribute=attribute)
+
+        return BoundModel(creator)