diff -r 12e8b65146d9 -r aff5d3498f68 cubicweb/web/test/data/cubicweb_file/views.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cubicweb/web/test/data/cubicweb_file/views.py	Tue Mar 19 13:17:47 2019 +0100
@@ -0,0 +1,9 @@
+from cubicweb.web import formwidgets as wdgs
+from cubicweb.web.views import uicfg
+
+# fields required in the schema but automatically set by hooks. Tell about that
+# to the ui
+_pvdc = uicfg.autoform_field_kwargs
+_pvdc.tag_attribute(('File', 'data_name'), {
+    'required': False, 'widget': wdgs.TextInput({'size': 45})})
+_pvdc.tag_attribute(('File', 'data_format'), {'required': False})