From ac8528c5847f4a517c16b5283c06d3caeae8ef5e Mon Sep 17 00:00:00 2001
From: Frederick Muriuki Muriithi
Date: Mon, 20 Dec 2021 07:19:16 +0300
Subject: Replace `NaN` with `null` in JSON string

Issue:
https://github.com/genenetwork/gn-gemtext-threads/blob/main/topics/gn1-migration-to-gn2/partial-correlations.gmi

* `NaN` is not a valid JSON value, and leads to errors in the code. This
  commit replaces all `NaN` values with `null`.
---
 gn3/api/correlation.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gn3/api/correlation.py b/gn3/api/correlation.py
index c0b5806..1caf31f 100644
--- a/gn3/api/correlation.py
+++ b/gn3/api/correlation.py
@@ -110,7 +110,7 @@ def partial_correlation():
         tuple(trait_fullname(trait) for trait in args["control_traits"]),
         args["method"], int(args["criteria"]), args["target_db"])
     response = make_response(
-        json.dumps(corr_results, cls=OutputEncoder),
+        json.dumps(corr_results, cls=OutputEncoder).replace(": NaN", ": null"),
         400 if "error" in corr_results.keys() else 200)
     response.headers["Content-Type"] = "application/json"
     return response
-- 
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