From 870e1b3f899ba8142ab8c8835d11ac2b2bd203ee Mon Sep 17 00:00:00 2001
From: Frederick Muriuki Muriithi
Date: Mon, 19 Sep 2022 07:45:53 +0300
Subject: Display correct error for missing file/directory

Provide the user with the missing file/directory in the error message
to make debugging easier.
---
 wqflask/wqflask/templates/mapping_error.html | 39 ++++++++++++++++++----------
 wqflask/wqflask/views.py                     |  4 +--
 2 files changed, 27 insertions(+), 16 deletions(-)

diff --git a/wqflask/wqflask/templates/mapping_error.html b/wqflask/wqflask/templates/mapping_error.html
index 884d4df8..963bf7d6 100644
--- a/wqflask/wqflask/templates/mapping_error.html
+++ b/wqflask/wqflask/templates/mapping_error.html
@@ -1,20 +1,31 @@
-{% extends "base.html" %}
-{% block title %}Error{% endblock %}
-{% block content %}
+{%extends "base.html"%}
+{%block titl%}Error{%endblock%}
+{%block content%}
 <!-- Start of body -->
-    {{ header("An error occurred during mapping") }}
+{{ header("An error occurred during mapping") }}
 
-    <div class="container">
-    <h3>
-        <p>There is likely an issue with the genotype file associated with this group/RISet. Please contact Zach Sloan (zachary.a.sloan@gmail.com) or Arthur Centeno (acenteno@gmail.com) about the data set in question.</p>
-    </h3>
-    <br>
-    <h3>
-        <p>Try mapping using interval mapping instead; some genotype files with many columns of NAs have issues with GEMMA or R/qtl.</p>
-    </h3>
-    </div>
+<div class="container">
+  <h3>
+    {%if error:%}
+    <p>
+      The following error was raised<br /><br />
+      &nbsp;&nbsp;&nbsp;&nbsp;{{error.args[0]}}<br /><br />
+    </p>
+    <p>
+      Please contact Zach Sloan (zachary.a.sloan@gmail.com) or Arthur Centeno
+      (acenteno@gmail.com) about the error.
+    </p>
+    {%else:%}
+    <p>There is likely an issue with the genotype file associated with this group/RISet. Please contact Zach Sloan (zachary.a.sloan@gmail.com) or Arthur Centeno (acenteno@gmail.com) about the data set in question.</p>
+  </h3>
+  <br>
+  <h3>
+    <p>Try mapping using interval mapping instead; some genotype files with many columns of NAs have issues with GEMMA or R/qtl.</p>
+    {%endif%}
+  </h3>
+</div>
 
 
 <!-- End of body -->
 
-{% endblock %}
+{%endblock%}
diff --git a/wqflask/wqflask/views.py b/wqflask/wqflask/views.py
index 223b8507..ee0cd582 100644
--- a/wqflask/wqflask/views.py
+++ b/wqflask/wqflask/views.py
@@ -722,8 +722,8 @@ def mapping_results_page():
             if template_vars.no_results:
                 rendered_template = render_template("mapping_error.html")
                 return rendered_template
-        except:
-            rendered_template = render_template("mapping_error.html")
+        except FileNotFoundError as fnfe:
+            rendered_template = render_template("mapping_error.html", error=fnfe)
             return rendered_template
 
         if not template_vars.pair_scan:
-- 
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