Added are all fieds none method. (#42)

bunq/sdk/model/core.py

@@ -2,6 +2,10 @@
 from bunq.sdk.json import converter
 
 
+class AnchoredObjectInterface:
+    pass
+
+
 class BunqModel(object):
     # Field constants
     _FIELD_RESPONSE = 'Response'
@@ -12,6 +16,9 @@ class BunqModel(object):
     # The very first index of an array
     _INDEX_FIRST = 0
 
+    def are_all_fields_none(self):
+        raise NotImplementedError
+
     def to_json(self):
         """
         :rtype: str
@@ -141,6 +148,13 @@ def id_(self):
 
         return self._id_
 
+    def are_all_fields_none(self):
+        if self.id_ is not None:
+            return False
+
+        return True
+
+
 
 class Uuid(BunqModel):
     """
@@ -158,6 +172,11 @@ def uuid(self):
 
         return self._uuid
 
+    def are_all_fields_none(self):
+        if self.uuid is not None:
+            return False
+
+        return True
 
 class SessionToken(BunqModel):
     """
@@ -205,6 +224,21 @@ def token(self):
 
         return self._token
 
+    def are_all_fields_none(self):
+        if self.id_ is not None:
+            return False
+
+        if self.created is not None:
+            return False
+
+        if self.updated is not None:
+            return False
+
+        if self.token is not None:
+            return False
+
+        return True
+
 
 class PublicKeyServer(BunqModel):
     """
@@ -222,6 +256,12 @@ def server_public_key(self):
 
         return self._server_public_key
 
+    def are_all_fields_none(self):
+        if self.server_public_key is not None:
+            return False
+
+        return True
+
 
 class Installation(BunqModel):
     """
@@ -296,6 +336,17 @@ def generate_request_body_bytes(cls, public_key_string):
             }
         ).encode()
 
+    def are_all_fields_none(self):
+        if self.id_ is not None:
+            return False
+
+        if self.token is not None:
+            return False
+
+        if self.server_public_key is not None:
+            return False
+
+        return True
 
 class SessionServer(BunqModel):
     """
@@ -373,4 +424,17 @@ def generate_request_body_bytes(cls, secret):
 
         return converter.class_to_json({cls.FIELD_SECRET: secret}).encode()
 
+    def are_all_fields_none(self):
+        if self.id_ is not None:
+            return False
+
+        if self.token is not None:
+            return False
+
+        if self.user_person is not None:
+            return False
+
+        if self.user_company is not None:
+            return False
 
+        return True