Use zope schema setter and getter

src/plone.server/CHANGELOG.rst

@@ -1,6 +1,9 @@
 1.0a9 (unreleased)
 ------------------
 
+- User zope.schema getter and setter to set attributes
+  [ramonnb]
+
 - Add functionality like virtualhost monster to define the urls
   [ramonnb]
 

src/plone.server/plone/server/json/deserialize_content.py

@@ -103,7 +103,10 @@ def set_schema(
                     errors.append({
                         'message': e.args[0], 'field': name, 'error': e})
                 else:
-                    setattr(obj, name, value)
+                    try:
+                        field.set(obj, value)
+                    except:
+                        setattr(obj, name, value)
             else:
                 if f.required and not hasattr(obj, name):
                     errors.append({

src/plone.server/plone/server/json/serialize_content_field.py

@@ -24,6 +24,9 @@ def __call__(self):
         return json_compatible(self.get_value())
 
     def get_value(self, default=None):
-        return getattr(self.context,
-                       self.field.__name__,
-                       default)
+        try:
+            return self.field.get(self.context)
+        except:
+            return getattr(self.context,
+                           self.field.__name__,
+                           default)