fixed quering from Klass so that only results are added to the data p…

…roperty

client.py

@@ -230,7 +230,7 @@ def query(self, query, klass=None):
             result = json.loads(content)
 
             if isinstance(klass, Klass):
-                klass.define_documents(result['result'])
+                klass.define_documents(result['result'], reset=True)
             else:
                 return Klass(database=self, documents=result['result'])
         else:
@@ -287,10 +287,13 @@ def __init__(self, database, name=None, schema=None, documents=None):
 
         self.define_documents(documents)
 
-    def define_documents(self, documents=None):    
+    def define_documents(self, documents=None, reset=False):    
         if documents is None:
             documents = {}
 
+        if reset:
+            self.data = {}
+
         keys = self.data.keys()
 
         for data in documents: