Compatibility fix #83. Explicitly pass None to the create_form/edit_form methods

flask_admin/model/base.py

@@ -821,7 +821,7 @@ class BaseModelView(BaseView, ActionsMixin):
         if not self.can_create:
             return redirect(return_url)
 
-        form = self.create_form()
+        form = self.create_form(None)
 
         if form.validate_on_submit():
             if self.create_model(form):
@@ -854,7 +854,7 @@ class BaseModelView(BaseView, ActionsMixin):
         if model is None:
             return redirect(return_url)
 
-        form = self.edit_form(obj=model)
+        form = self.edit_form(None, obj=model)
 
         if form.validate_on_submit():
             if self.update_model(form, model):