Resolve "exceeded visits list & unfinished visits list"

Closes #146 (closed)

smash/web/api_views/serialization_utils.py

@@ -21,4 +21,25 @@ def location_to_str(location):
     result = ""
     if location is not None:
         result = unicode(location.name)
-    return result
\ No newline at end of file
+    return result
+
+
+def add_column(result, name, field_name, column_list, param, columns_used_in_study=None, visible_param=None,
+               sortable=True):
+    add = True
+    if columns_used_in_study:
+        add = getattr(columns_used_in_study, field_name)
+    if add:
+        if visible_param is not None:
+            visible = visible_param
+        elif column_list is None:
+            visible = True
+        else:
+            visible = getattr(column_list, field_name)
+        result.append({
+            "type": field_name,
+            "name": name,
+            "filter": param,
+            "visible": visible,
+            "sortable": sortable
+        })