Question

I am making simple tree structure and in the tutorial is following:

• Build cache: TreeNode.rebuild_depth_cache!

I never use this command, I tried to give this line into my controller (in the action that I have loaded in browser) and tried to refresh and hoped everything will be ok, but no.

Cannot rebuild depth cache for model without depth caching.

(obviously I updated my model)

I tried to put this line into terminal window, but about error (command not found).

I am not sure where to put this command – into the controller (and there into an action) or into the terminal? I really don’t know where this command should go, so I would like to ask you about the help…

Or, is everything other needed for run this command?

Answer 1

You need to run it in the Rails console: rails c in your terminal. And then run your command TreeNode.rebuild_depth_cache!.

The error is suspicious though. Are you sure you did not forget to call a class method in your model to make it act as a tree?

Can you link to the tutorial?