Accept Terms value to be any iterable (#1887) (#1889)

Co-authored-by: Roxane <r.bellot@octopusmind.info>
(cherry picked from commit 8cc2ed2)

Co-authored-by: roxanebellot <roxane.bellot@gmail.com>

elasticsearch_dsl/query.py

@@ -550,6 +550,9 @@ class Term(Query):
 class Terms(Query):
     name = "terms"
 
+    def _setattr(self, name: str, value: Any) -> None:
+        super()._setattr(name, list(value))
+
 
 class TermsSet(Query):
     name = "terms_set"

tests/test_query.py

@@ -77,6 +77,15 @@ def test_term_to_dict() -> None:
     assert {"term": {"_type": "article"}} == query.Term(_type="article").to_dict()
 
 
+def test_terms_to_dict() -> None:
+    assert {"terms": {"_type": ["article", "section"]}} == query.Terms(
+        _type=["article", "section"]
+    ).to_dict()
+    assert {"terms": {"_type": ["article", "section"]}} == query.Terms(
+        _type=("article", "section")
+    ).to_dict()
+
+
 def test_bool_to_dict() -> None:
     bool = query.Bool(must=[query.Match(f="value")], should=[])