fix: removes dates that fail the dateparsing

python does not allow for dates prior 0000. to allow for that we need
to move to another library. For the moment we remove dates that fail
to parse

fixes #165

intavia_backend/utils.py

@@ -130,7 +130,10 @@ def flatten_rdf_data(data: dict) -> list:
                 if "value" in v:
                     if "datatype" in v:
                         if v["datatype"] == "http://www.w3.org/2001/XMLSchema#dateTime":
-                            v["value"] = datetime.datetime.fromisoformat(str(v["value"]).replace("Z", "+00:00"))
+                            try:
+                                v["value"] = datetime.datetime.fromisoformat(str(v["value"]).replace("Z", "+00:00"))
+                            except ValueError:
+                                continue  # FIXME: this is removing dates before 0, should be fixed
                         elif v["datatype"] == "http://www.w3.org/2001/XMLSchema#integer":
                             v["value"] = int(v["value"])
                         elif v["datatype"] == "http://www.w3.org/2001/XMLSchema#boolean":