From 185fc586d0f1c1faee4418805a1788e8d57680d8 Mon Sep 17 00:00:00 2001
From: Frederick Muriuki Muriithi
Date: Mon, 12 Sep 2022 07:38:36 +0300
Subject: Check for species before calling `lower()`

---
 wqflask/wqflask/correlation/correlation_gn3_api.py | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/wqflask/wqflask/correlation/correlation_gn3_api.py b/wqflask/wqflask/correlation/correlation_gn3_api.py
index 1a375501..74796383 100644
--- a/wqflask/wqflask/correlation/correlation_gn3_api.py
+++ b/wqflask/wqflask/correlation/correlation_gn3_api.py
@@ -146,10 +146,7 @@ def lit_for_trait_list(corr_results, this_dataset, this_trait):
     geneid_dict = {trait_name: geneid for (trait_name, geneid) in geneid_dict.items() if
                    trait_lists.get(trait_name)}
 
-    conn = database_connector()
-
-    with conn:
-
+    with database_connector() as conn:
         correlation_results = compute_all_lit_correlation(
             conn=conn, trait_lists=list(geneid_dict.items()),
             species=species, gene_id=this_trait_geneid)
@@ -238,7 +235,9 @@ def compute_corr_for_top_results(start_vars,
 def do_lit_correlation(this_trait, this_dataset):
     """function for fetching lit inputs"""
     geneid_dict = this_dataset.retrieve_genes("GeneId")
-    species = this_dataset.group.species.lower()
+    species = this_dataset.group.species
+    if species:
+        species = species.lower()
     trait_geneid = this_trait.geneid
     return (trait_geneid, geneid_dict, species)
 
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