fix overwriting of service url

Author: emdekatharina

frost_sta_client/__version__.py

@@ -1,5 +1,5 @@
 __title__ = 'frost_sta_client'
-__version__ = '1.1.32'
+__version__ = '1.1.33'
 __license__ = 'LGPL3'
 __author__ = 'Katharina Emde'
 __copyright__ = 'Fraunhofer IOSB'

frost_sta_client/dao/observation.py

@@ -35,7 +35,7 @@ def __init__(self, service):
         base.BaseDao.__init__(self, service, EntityTypes["Observation"])
 
     def create(self, data_array):
-        url = self.service.url
+        url = self.service.url.copy()
         url.path.add(self.CREATE_OBSERVATIONS)
         logging.debug('Posting to ' + str(url.url))
         json_dict = transform_entity_to_json_dict(data_array.value)

frost_sta_client/model/ext/unitofmeasurement.py

@@ -29,29 +29,32 @@ def name(self):
 
     @name.setter
     def name(self, value):
-        if not isinstance(value, str):
-            raise ValueError('name should be of type str!')
-        self._name = value
+        if isinstance(value, str) or value is None:
+            self._name = value
+            return
+        raise ValueError('name should be of type str!')
 
     @property
     def symbol(self):
         return self._symbol
 
     @symbol.setter
     def symbol(self, value):
-        if not isinstance(value, str):
-            raise ValueError('symbol should be of type str!')
-        self._symbol = value
+        if isinstance(value, str) or value is None:
+            self._symbol = value
+            return
+        raise ValueError('symbol should be of type str!')
 
     @property
     def definition(self):
         return self._definition
 
     @definition.setter
     def definition(self, value):
-        if not isinstance(value, str):
-            raise ValueError('definition should be of type str!')
-        self._definition = value
+        if isinstance(value, str) or value is None:
+            self._definition = value
+            return
+        raise ValueError('definition should be of type str!')
 
     def __getstate__(self):
         data = {