Fix but deprecate parameter aliases in body parameter

elasticsearch/_sync/client/utils.py

@@ -298,7 +298,8 @@ def _merge_kwargs_no_duplicates(kwargs: Dict[str, Any], values: Dict[str, Any])
 
 def _merge_body_fields_no_duplicates(
     body: _TYPE_BODY, kwargs: Dict[str, Any], body_fields: Tuple[str, ...]
-) -> None:
+) -> bool:
+    mixed_body_and_params = False
     for key in list(kwargs.keys()):
         if key in body_fields:
             if isinstance(body, (str, bytes)):
@@ -315,11 +316,13 @@ def _merge_body_fields_no_duplicates(
             warnings.warn(
                 f"Received '{key}' via a specific parameter in the presence of a "
                 "'body' parameter, which is deprecated and will be removed in a future "
-                "version. Instead, use only 'body' or only specific paremeters.",
+                "version. Instead, use only 'body' or only specific parameters.",
                 category=DeprecationWarning,
                 stacklevel=warn_stacklevel(),
             )
             body[key] = kwargs.pop(key)
+            mixed_body_and_params = True
+    return mixed_body_and_params
 
 
 def _rewrite_parameters(
@@ -401,6 +404,7 @@ def wrapped(*args: Any, **kwargs: Any) -> Any:
                 not ignore_deprecated_options or "body" not in ignore_deprecated_options
             ):
                 body: Optional[_TYPE_BODY] = kwargs.pop("body")
+                mixed_body_and_params = False
                 if body is not None:
                     if body_name:
                         if body_name in kwargs:
@@ -411,11 +415,27 @@ def wrapped(*args: Any, **kwargs: Any) -> Any:
                                 "issues/1698 for more information"
                             )
                         kwargs[body_name] = body
-
                     elif body_fields is not None:
-                        _merge_body_fields_no_duplicates(body, kwargs, body_fields)
+                        mixed_body_and_params = _merge_body_fields_no_duplicates(
+                            body, kwargs, body_fields
+                        )
                         kwargs["body"] = body
 
+                    if parameter_aliases and not isinstance(body, (str, bytes)):
+                        for alias, rename_to in parameter_aliases.items():
+                            if rename_to in body:
+                                body[alias] = body.pop(rename_to)
+                                # If body and params are mixed, the alias may come from a param,
+                                # in which case the warning below will not make sense.
+                                if not mixed_body_and_params:
+                                    warnings.warn(
+                                        f"Using '{rename_to}' alias in 'body' is deprecated and will be removed "
+                                        f"in a future version of elasticsearch-py. Use '{alias}' directly instead. "
+                                        "See https://github.com/elastic/elasticsearch-py/issues/1698 for more information",
+                                        category=DeprecationWarning,
+                                        stacklevel=2,
+                                    )
+
             if parameter_aliases:
                 for alias, rename_to in parameter_aliases.items():
                     try:

test_elasticsearch/test_client/test_rewrite_parameters.py

@@ -191,7 +191,7 @@ def test_body_fields_merge(self):
         assert str(w[0].message) == (
             "Received 'source' via a specific parameter in the presence of a "
             "'body' parameter, which is deprecated and will be removed in a future "
-            "version. Instead, use only 'body' or only specific paremeters."
+            "version. Instead, use only 'body' or only specific parameters."
         )
 
     def test_body_fields_conflict(self):
@@ -238,6 +238,41 @@ def test_parameter_aliases(self):
         self.wrapped_func_aliases(source=["key3"])
         assert self.calls[-1] == ((), {"source": ["key3"]})
 
+    def test_parameter_aliases_body(self):
+        with pytest.warns(
+            DeprecationWarning,
+            match=(
+                "Using 'source' alias in 'body' is deprecated and will be removed in a future version of elasticsearch-py. "
+                "Use '_source' directly instead."
+            ),
+        ):
+            self.wrapped_func_aliases(body={"source": ["key4"]})
+
+        # using the correct name does not warn
+        with warnings.catch_warnings():
+            warnings.simplefilter("error")
+            self.wrapped_func_aliases(body={"_source": ["key4"]})
+
+    def test_parameter_aliases_body_param(self):
+        with pytest.warns(
+            DeprecationWarning,
+            match=(
+                "Received 'source' via a specific parameter in the presence of a "
+                "'body' parameter, which is deprecated and will be removed in a future "
+                "version. Instead, use only 'body' or only specific parameters."
+            ),
+        ):
+            self.wrapped_func_aliases(
+                source=["key4"], body={"query": {"match_all": {}}}
+            )
+
+        # using the correct name does not warn
+        with warnings.catch_warnings():
+            warnings.simplefilter("error")
+            self.wrapped_func_aliases(
+                body={"query": {"match_all": {}}, "_source": ["key4"]}
+            )
+
     @pytest.mark.parametrize("client_cls", [Elasticsearch, AsyncElasticsearch])
     def test_positional_argument_error(self, client_cls):
         client = client_cls("https://localhost:9200")