now processes a an empty event list

2 files changed, 30 insertions, 2 deletions

diff --git a/ctrack/register/css.py b/ctrack/register/css.py
index 9b1f150..65a2c43 100644
--- a/ctrack/register/css.py
+++ b/ctrack/register/css.py
@@ -47,10 +47,19 @@ class Swimlane:
             )
 
     def table_row_builder(self):
+        org = self.org_name
         if len(self.events) == 0:
-            raise ValueError("Cannot handle an empty list")
+            tmpl = "<td{0}>{1}</td>"
+            processing_these_attrs = [x.type_descriptor for x in self.__dict__.values() if isinstance(x, EventBase)]
+            empties = [{e: tmpl.format("", e)} for e in self.attrs_added if
+                       e[:3] == "CAF" and e not in processing_these_attrs]
+            empties = sorted(empties, key=self._sort_func)
+            empties = [list(x.values())[0] for x in empties]
+            empties = "\n".join(empties)
+            return "".join(
+                ["<tr>\n", f"<td>{org}</td>\n", empties, "\n", "</tr>"]
+            )
         tmpl = "<td{0}>{1}</td>"
-        org = self.events[0].related_caf.organisation.name
         processing_these_attrs = [x.type_descriptor for x in self.__dict__.values() if isinstance(x, EventBase)]
         empties = [{e: tmpl.format("", e)} for e in self.attrs_added if
                    e[:3] == "CAF" and e not in processing_these_attrs]
diff --git a/ctrack/register/tests/test_css.py b/ctrack/register/tests/test_css.py
index fe530bd..44a681c 100644
--- a/ctrack/register/tests/test_css.py
+++ b/ctrack/register/tests/test_css.py
@@ -138,3 +138,22 @@ def test_table_row_builder(user, caf):
         "<td>CAF_VALIDATION_PERIOD</td>\n"
         "</tr>"
     )
+
+
+def test_table_row_builder_with_no_events(user, caf):
+    org_name = caf.organisation.name
+    sl = Swimlane(org_name, [])
+    assert sl.table_row_builder() == (
+        "<tr>\n"
+        f"<td>{caf.organisation.name}</td>\n"
+        "<td>CAF_INITIAL_CAF_RECEIVED</td>\n"
+        '<td>CAF_INITIAL_REVIEW_COMPLETE</td>\n'
+        "<td>CAF_FEEDBACK_EMAILED_OES</td>\n"
+        "<td>CAF_RECEIVED</td>\n"
+        "<td>CAF_EMAILED_ROSA</td>\n"
+        "<td>CAF_VALIDATION_SIGN_OFF</td>\n"
+        "<td>CAF_VALIDATION_RECORD_EMAILED_TO_OES</td>\n"
+        "<td>CAF_PEER_REVIEW_PERIOD</td>\n"
+        "<td>CAF_VALIDATION_PERIOD</td>\n"
+        "</tr>"
+    )