BUG: Checkpoints were not being moved for directory renames

pgcontents/query.py

@@ -650,6 +650,9 @@ def move_single_remote_checkpoint(db,
 def move_remote_checkpoints(db, user_id, src_api_path, dest_api_path):
     src_db_path = from_api_filename(src_api_path)
     dest_db_path = from_api_filename(dest_api_path)
+
+    # Update the paths of the checkpoints for the file being renamed. If the
+    # source path is for a directory then this is a no-op.
     db.execute(
         remote_checkpoints.update().where(
             and_(
@@ -661,6 +664,25 @@ def move_remote_checkpoints(db, user_id, src_api_path, dest_api_path):
         ),
     )
 
+    # If the given source path is for a directory, update the paths of the
+    # checkpoints for all files in that directory and its subdirectories.
+    db.execute(
+        remote_checkpoints.update().where(
+            and_(
+                remote_checkpoints.c.user_id == user_id,
+                remote_checkpoints.c.path.startswith(src_db_path),
+            ),
+        ).values(
+            path=func.concat(
+                dest_db_path,
+                func.right(
+                    remote_checkpoints.c.path,
+                    -func.length(src_db_path),
+                ),
+            ),
+        )
+    )
+
 
 def get_remote_checkpoint(db, user_id, api_path, checkpoint_id, decrypt_func):
     db_path = from_api_filename(api_path)

pgcontents/tests/test_pgcontents_api.py

@@ -215,17 +215,23 @@ def test_checkpoints_move_with_file(self):
         checkpoints = self.api.get_checkpoints('foo/bar/a.ipynb').json()
         self.assertEqual(checkpoints, [response_json])
 
-        # Move the file back up.
-        self.api.rename('foo/bar/a.ipynb', 'foo/a.ipynb')
-
-        # Looking for checkpoints in the old location should yield no results.
+        # Rename the directory that the file is in.
+        self.api.rename('foo/bar', 'foo/car')
         self.assertEqual(
             self.api.get_checkpoints('foo/bar/a.ipynb').json(),
             [],
         )
+        checkpoints = self.api.get_checkpoints('foo/car/a.ipynb').json()
+        self.assertEqual(checkpoints, [response_json])
 
-        # Looking for checkpoints in the new location should work.
-        checkpoints = self.api.get_checkpoints('foo/a.ipynb').json()
+        # Now move the directory that the file is in.
+        self.make_dir('foo/buz')
+        self.api.rename('foo/car', 'foo/buz/car')
+        self.assertEqual(
+            self.api.get_checkpoints('foo/car/a.ipynb').json(),
+            [],
+        )
+        checkpoints = self.api.get_checkpoints('foo/buz/car/a.ipynb').json()
         self.assertEqual(checkpoints, [response_json])
 
 
@@ -405,6 +411,9 @@ def teardown_class(cls):
         super(PostgresContentsFileCheckpointsAPITest, cls).teardown_class()
         cls.td.cleanup()
 
+    def test_checkpoints_move_with_file(self):
+        pass
+
 
 def postgres_checkpoints_config():
     """