From f7219b4f5d401a281e31502704bd658b3973a4db Mon Sep 17 00:00:00 2001
From: Chris Deery <3932645+cdeery@users.noreply.github.com>
Date: Tue, 22 Mar 2022 17:35:45 -0400
Subject: [PATCH] fix: [AA-1219] Crash when locked content rendered without
 unit ID (#878)

Allows SequenceNavigation to complete rendering even if unitId is not provided.
---
 .../sequence/sequence-navigation/UnitButton.jsx       | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/courseware/course/sequence/sequence-navigation/UnitButton.jsx b/src/courseware/course/sequence/sequence-navigation/UnitButton.jsx
index e3863d46..ed55e1a4 100644
--- a/src/courseware/course/sequence/sequence-navigation/UnitButton.jsx
+++ b/src/courseware/course/sequence/sequence-navigation/UnitButton.jsx
@@ -69,8 +69,13 @@ UnitButton.defaultProps = {
   showCompletion: true,
 };
 
-const mapStateToProps = (state, props) => ({
-  ...state.models.units[props.unitId],
-});
+const mapStateToProps = (state, props) => {
+  if (props.unitId) {
+    return {
+      ...state.models.units[props.unitId],
+    };
+  }
+  return {};
+};
 
 export default connect(mapStateToProps)(UnitButton);