Added get_file method to datasets

ref-test/app/admin/views.py

@@ -435,10 +435,7 @@ def _view_entry(id:str=None):
         flash('Invalid entry ID.', 'error')
         return redirect(url_for('admin._view_entries'))
     test = entry.test
-    dataset = test.dataset
-    dataset_path = dataset.get_file()
-    with open(dataset_path, 'r') as _dataset:
-        data = loads(_dataset.read())
+    data = test.dataset.get_data()
     correct = get_correct_answers(dataset=data)
     answers = answer_options(dataset=data)
     return render_template('/admin/result-detail.html', entry = entry, correct = correct, answers = answers)