Raise error if file is missing rather than returning a Union value.

1 files changed, 6 insertions, 3 deletions

diff --git a/qc_app/samples.py b/qc_app/samples.py
index 55e94ab..1845818 100644
--- a/qc_app/samples.py
+++ b/qc_app/samples.py
@@ -219,9 +219,12 @@ def upload_samples():
             flash("Invalid grouping/population!", "alert-error")
             return samples_uploads_page
 
-        samples_file = save_file(request.files["samples_file"], Path(app.config["UPLOAD_FOLDER"]))
-        if not bool(samples_file):
-            flash("You need to provide a file with the samples data.")
+        try:
+            samples_file = save_file(request.files["samples_file"],
+                                     Path(app.config["UPLOAD_FOLDER"]))
+        except AssertionError:
+            flash("You need to provide a file with the samples data.",
+                  "alert-error")
             return samples_uploads_page
 
         firstlineheading = (request.form.get("first_line_heading") == "on")