Merge pull request #122 from bjourne/master

use prettify_name so that you can easily override the default prettification strategy

flask_admin/contrib/sqlamodel/form.py

 from wtforms import fields, validators
+# Field has better input parsing capabilities.
+from wtforms.ext.dateutil.fields import DateTimeField
 from sqlalchemy import Boolean, Column
 
 from flask.ext.admin import form
@@ -21,6 +23,13 @@ class AdminModelConverter(ModelConverterBase):
         self.view = view
 
     def _get_label(self, name, field_args):
+        """
+            Label for field name. If it is not specified explicitly,
+            then the views prettify_name method is used to find it.
+
+            :param field_args:
+                Dictionary with additional field arguments
+        """
         if 'label' in field_args:
             return field_args['label']
 
@@ -29,7 +38,7 @@ class AdminModelConverter(ModelConverterBase):
         if column_labels:
             return column_labels.get(name)
 
-        return None
+        return self.view.prettify_name(name)
 
     def _get_field_override(self, name):
         form_overrides = getattr(self.view, 'form_overrides', None)
@@ -203,7 +212,7 @@ class AdminModelConverter(ModelConverterBase):
     @converts('DateTime')
     def convert_datetime(self, field_args, **extra):
         field_args['widget'] = form.DateTimePickerWidget()
-        return fields.DateTimeField(**field_args)
+        return DateTimeField(**field_args)
 
     @converts('Time')
     def convert_time(self, field_args, **extra):