From 4df05911a28e32a6772f72b6967df2bd09f95e67 Mon Sep 17 00:00:00 2001
From: Marco Donadoni <marco.donadoni@cern.ch>
Date: Wed, 26 Jun 2024 12:09:45 +0200
Subject: [PATCH] fix(get_workflow_specification): avoid returning null
 parameters (#689)

Closes reanahub/reana-client#718
---
 reana_server/rest/workflows.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/reana_server/rest/workflows.py b/reana_server/rest/workflows.py
index 231118cc..f228ee22 100644
--- a/reana_server/rest/workflows.py
+++ b/reana_server/rest/workflows.py
@@ -765,7 +765,8 @@ def get_workflow_specification(workflow_id_or_name, user):  # noqa
             jsonify(
                 {
                     "specification": workflow.reana_specification,
-                    "parameters": workflow.input_parameters,
+                    # `input_parameters` can be null, if so return an empty dict
+                    "parameters": workflow.input_parameters or {},
                 }
             ),
             200,