displays meaningful instruction instead of 500 internal server error

app/routers/reports.py

@@ -122,6 +122,9 @@ def student_quiz_report(request: Request, session_id: str, user_id: str):
             # it's possible that the strings are URL encoded.
             session_id = unquote(session_id)
             user_id = unquote(user_id)
+            data = self.__student_quiz_reports_controller.get_student_quiz_report(
+                    session_id=session_id, user_id=user_id
+                )
             try:
                 data = self.__student_quiz_reports_controller.get_student_quiz_report(
                     session_id=session_id, user_id=user_id
@@ -130,6 +133,20 @@ def student_quiz_report(request: Request, session_id: str, user_id: str):
                 raise HTTPException(
                     status_code=400, detail="No student_quiz_report found"
                 )
+
+            if len(data) == 0:
+                # no data
+                error_data = {
+                    "session_id": session_id,
+                    "user_id": user_id,
+                    "error_message": "No report found. Please contact admin.",
+                    "status_code": 400
+                }
+                return self._templates.TemplateResponse(
+                    "error.html",
+                    {"request": request, "error_data": error_data}
+                )
+
             report_data = {}
             report_data["student_name"] = ""
             test_id = data[0]["test_id"]

app/templates/error.html

@@ -0,0 +1,13 @@
+{% extends "layout.html" %}
+{% block title %}Error{% endblock %}
+
+{% block content %}
+
+<section id="error_page">
+    <div id="section_heading">{{ error_data["error_message"] }}</div>
+    <div id="name_card">
+        <p>Student ID: {{error_data["user_id"]}}
+    </div>
+</section>
+
+{% endblock %}