Ignore None return from get_operation

docs/changelog.rst

@@ -3,6 +3,14 @@ Changelog
 #########
 
 
+*********
+**1.7.4**
+*********
+
+*Release date: May 14, 2018*
+
+- **FIXED:** ignore ``None`` return from ``get_operation`` to avoid empty ``Path`` objects in output
+
 *********
 **1.7.3**
 *********
@@ -11,7 +19,6 @@ Changelog
 
 - **FIXED:** views whose ``__init__`` methods throw exceptions will now be ignored during endpoint enumeration
 
-
 *********
 **1.7.2**
 *********
@@ -21,7 +28,6 @@ Changelog
 - **FIXED:** fixed generation of default ``SECURITY_REQUIREMENTS`` to match documented behaviour
 - **FIXED:** ordering of ``SECURITY_REQUIREMENTS`` and ``SECURITY_DEFINITIONS`` is now stable
 
-
 *********
 **1.7.1**
 *********

src/drf_yasg/generators.py

@@ -324,7 +324,9 @@ class OpenAPISchemaGenerator(object):
                 if not public and not self._gen.has_view_permissions(path, method, view):
                     continue
 
-                operations[method.lower()] = self.get_operation(view, path, prefix, method, components, request)
+                operation = self.get_operation(view, path, prefix, method, components, request)
+                if operation is not None:
+                    operations[method.lower()] = operation
 
             if operations:
                 # since the common prefix is used as the API basePath, it must be stripped