greco: send NULL when a param is missing (#78260)

passerelle/contrib/greco/formdata.py

@@ -118,7 +118,7 @@ class FormData:
                 if isinstance(value, datetime):
                     value = value.strftime('%Y-%m-%dT%H:%M:%S')
             else:
-                value = ''
+                value = None
             if '_' not in fieldname:
                 self.json[fieldname] = value
                 continue

tests/test_greco.py

@@ -246,8 +246,8 @@ def test_greco_rest_create_ok(app, rest_conn):
     assert json_part.headers[b'Content-Type'] == b'application/json'
     demande_creation = json.loads(json_part.content)
     assert demande_creation['application'] == '69999'
-    assert demande_creation['beneficiaire']['fax'] == ''
-    assert demande_creation['beneficiaire']['numerovoie'] == ''
+    assert demande_creation['beneficiaire']['fax'] == None
+    assert demande_creation['beneficiaire']['numerovoie'] == None
     assert demande_creation['localisation']['xgeoloc'] == '50.89491'
     assert demande_creation['localisation']['ygeoloc'] == '4.34151'
     assert demande_creation['transmetteur']['nom'] == 'Vertommen'