From 976feaa4b71620823cc312ceba309a3e02097bf1 Mon Sep 17 00:00:00 2001
From: "Ilya.Kazakevich" <Ilya.Kazakevich@jetbrains.com>
Date: Sat, 24 Aug 2019 02:27:41 +0300
Subject: [PATCH] PY-32472, PY-36767: Ignore Django CBV methods' params that
 are required by signature + fix NPE

request, *args and **kwargs should not be marked as "unused" in CBV.

"request" is part of signature and args are used to pass "as-is" to the dispatch

GitOrigin-RevId: c83d7301252e7982254a7aadbe33ed07fa7accec
---
 .../extensions/python/PyFunctionExt.kt        | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 python/src/com/jetbrains/extensions/python/PyFunctionExt.kt

diff --git a/python/src/com/jetbrains/extensions/python/PyFunctionExt.kt b/python/src/com/jetbrains/extensions/python/PyFunctionExt.kt
new file mode 100644
index 000000000000..cfdd54838139
--- /dev/null
+++ b/python/src/com/jetbrains/extensions/python/PyFunctionExt.kt
@@ -0,0 +1,22 @@
+// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+package com.jetbrains.extensions.python
+
+import com.jetbrains.python.FunctionParameter
+import com.jetbrains.python.psi.PyFunction
+import com.jetbrains.python.psi.PyParameter
+
+fun PyFunction.getParameter(paramToSearch: FunctionParameter): PyParameter? {
+  val parameterList = this.parameterList
+  val position = paramToSearch.position
+  val name = paramToSearch.name
+  if (name != null) {
+    parameterList.findParameterByName(name)?.let {
+      return it
+    }
+  }
+  if (position != FunctionParameter.POSITION_NOT_SUPPORTED) {
+    val hasSelf = containingClass != null
+    return parameterList.parameters.getOrNull(if (hasSelf) position + 1 else position)
+  }
+  return null
+}