adapt serialization

Author: Frosty2500

sdk/basyx/aas/adapter/json/json_serialization.py

@@ -476,7 +476,8 @@ def _blob_to_json(cls, obj: model.Blob) -> Dict[str, object]:
         :return: dict with the serialized attributes of this object
         """
         data = cls._abstract_classes_to_json(obj)
-        data['contentType'] = obj.content_type
+        if obj.content_type is not None:
+            data['contentType'] = obj.content_type
         if obj.value is not None:
             data['value'] = base64.b64encode(obj.value).decode()
         return data
@@ -490,7 +491,8 @@ def _file_to_json(cls, obj: model.File) -> Dict[str, object]:
         :return: dict with the serialized attributes of this object
         """
         data = cls._abstract_classes_to_json(obj)
-        data['contentType'] = obj.content_type
+        if obj.content_type is not None:
+            data['contentType'] = obj.content_type
         if obj.value is not None:
             data['value'] = obj.value
         return data

sdk/basyx/aas/model/submodel.py

@@ -474,7 +474,7 @@ class Blob(DataElement):
 
     def __init__(self,
                  id_short: Optional[base.NameType],
-                 content_type: Optional[base.ContentType],
+                 content_type: Optional[base.ContentType] = None,
                  value: Optional[base.BlobType] = None,
                  display_name: Optional[base.MultiLanguageNameType] = None,
                  category: Optional[base.NameType] = None,
@@ -528,7 +528,7 @@ class File(DataElement):
 
     def __init__(self,
                  id_short: Optional[base.NameType],
-                 content_type: Optional[base.ContentType],
+                 content_type: Optional[base.ContentType] = None,
                  value: Optional[base.PathType] = None,
                  display_name: Optional[base.MultiLanguageNameType] = None,
                  category: Optional[base.NameType] = None,