Fix usage of the query params with double underscore

Fixing this issue properly by editing the jinja templates would
currently require extensive changes in the templates and are simply
not worth the time right now. It can probably be done once we begin the
process of updating the bindings to start using the newest version
of the OpenAPI Python Client library

CHANGELOG.md

@@ -11,6 +11,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## Unreleased
+### Fixed
+- fix usage of query parameters with double underscore
 
 ## [1.3.9] - 2023-08-25
 ### Changed

component_registry_bindings/session.py

@@ -34,20 +34,45 @@
 )
 
 
+def double_underscores_to_single_underscores(fn):
+    """
+    Function decorator which changes all the keyword arguments which include
+    double underscore to use single underscore instead.
+
+    eg. affect__affectedness -> affect_affectedness
+
+    This change is needed because in OpenAPI schema query parameters might contain
+    double underscore, howerver OpenAPI Python Client package converts all these
+    double underscores into single ones and thus this creates a confusion as user
+    tries to use query parameter from the OpenAPI schema specification unaware of
+    the underscore change.
+    """
+
+    def inner(*args, **kwargs):
+        new_kwargs = {name.replace("__", "_"): value for name, value in kwargs.items()}
+        return fn(*args, **new_kwargs)
+
+    return inner
+
+
 def get_sync_function(api_module: ModuleType) -> Callable:
     """
     Get 'sync' function from API module if available (response example is defined in schema)
     or get basic 'sync_detailed' function (response example is not defined in schema)
     """
-    return getattr(api_module, "sync", getattr(api_module, "sync_detailed"))
+    return double_underscores_to_single_underscores(
+        getattr(api_module, "sync", getattr(api_module, "sync_detailed"))
+    )
 
 
 def get_async_function(api_module: ModuleType) -> Callable:
     """
     Get 'sync' function from API module if available (response example is defined in schema)
     or get basic 'sync_detailed' function (response example is not defined in schema)
     """
-    return getattr(api_module, "async_", getattr(api_module, "async_detailed"))
+    return double_underscores_to_single_underscores(
+        getattr(api_module, "async_", getattr(api_module, "async_detailed"))
+    )
 
 
 def new_session(