remove comments for deleted posts/pages

data/patches/cleanup.js

@@ -0,0 +1,25 @@
+'use strict';
+/* global db:true */
+
+const comments = db.comments.find();
+while (comments.hasNext()) {
+  const comment = comments.next();
+  print(`${comment.resourceType}:${comment._id}:${comment.resource}`);
+  
+  let resource;
+  switch (comment.resourceType) {
+    case 'Post':
+      resource = db.posts.findOne({ _id: comment.resource });
+      break;
+    case 'Page':
+      resource = db.pages.findOne({ _id: comment.resource });
+      break;
+  }
+  if (resource) {
+    continue;
+  }
+  print('comment resource is missing!');
+
+  const result = db.comments.deleteMany({ resource: comment.resource });
+  printjson(result);
+}