also include assignment attempts without solutions, fixes #249

controllers/solutions.php

@@ -2196,6 +2196,18 @@ function get_solutions($assignment, $view)
         }
     }
 
+    // get assignment attempts //
+
+    foreach ($assignment->assignment_attempts as $attempt) {
+        $user_id = $attempt->user_id;
+
+        $solvers[$user_id] = [
+            'type'      => 'single',
+            'id'        => $user_id,
+            'user_id'   => $user_id
+        ];
+    }
+
     // get solutions //
 
     $solutions = [];