Document with no index should always match hits

Fixes #1203

Author: honzakral

elasticsearch_dsl/document.py

@@ -111,6 +111,8 @@ class Document(ObjectBase):
     """
     @classmethod
     def _matches(cls, hit):
+        if cls._index._name is None:
+            return True
         return fnmatch(hit.get('_index', ''), cls._index._name)
 
     @classmethod

test_elasticsearch_dsl/test_document.py

@@ -140,6 +140,13 @@ def test_matches_uses_index():
         '_index': 'not-test-git'
     })
 
+def test_matches_with_no_name_always_matches():
+    class D(document.Document):
+        pass
+
+    assert D._matches({})
+    assert D._matches({'_index': 'whatever'})
+
 def test_matches_accepts_wildcards():
     class MyDoc(document.Document):
         class Index: