fix: unsupported type error thrown for empty array field

resolves #7.

Author: AsifArmanRahman

firebase/firestore/_utils.py

@@ -32,11 +32,12 @@ def _from_datastore(data):
 		if val.get('mapValue'):
 			data_to_restructure[key] = _from_datastore(val['mapValue'])
 
-		elif val.get('arrayValue'):
+		elif isinstance(val.get('arrayValue'), dict):
 			arr = []
 
-			for x in val['arrayValue']['values']:
-				arr.append(_decode_datastore(x))
+			if val['arrayValue'].get('values'):
+				for x in val['arrayValue']['values']:
+					arr.append(_decode_datastore(x))
 
 			data_to_restructure[key] = arr
 

tests/test_firestore.py

@@ -105,7 +105,8 @@ class TestFirestoreAuth:
 		'year': 2016,
 		'rating': 7.5,
 		'prequel': None,
-		'cast': ['Tilda Swinton', 'Rachel McAdams', 'Mads Mikkelsen', 'Chiwetel Ejiofor', 'Benedict Wong']
+		'cast': ['Tilda Swinton', 'Rachel McAdams', 'Mads Mikkelsen', 'Chiwetel Ejiofor', 'Benedict Wong'],
+		'producers': []
 	}
 
 	movies2 = {