prevent /cable from being prepended to ActiveStorage route helpers

[leastbad]

Type of PR (feature, enhancement, bug fix, etc.)

Bug fix

Description

I observed that when using our brand new render helper to render a partial that contains ActiveStorage route helpers such as rails_blob_path and object.blob.representation, the ActionCable mount URL would be prepended to the ActiveStorage route path generated, breaking the route.

After substantial experimentation and general frustration, I was able to suppress this behaviour by setting the SCRIPT_NAME value to "".

I have verified that this solution provides a successful outcome in the following scenarios:

• rendering partials within partials
• calling current_user.name
• calling a controller-specific helper
• calling a route helper

My current best guess is that if the change I made is going to cause problems, it'll be when trying to call our render helper inside of a Reflex, inside of an Engine.

As of the time I'm creating this PR, I've not been able to test the above scenario. If someone is able to quickly spin up an engine to test, I would be highly appreciative.

Why should this be added

Developers rightly expect all Rails-provided helpers to work normally.

Checklist

• My code follows the style guidelines of this project
• Checks (StandardRB & Prettier-Standard) are passing
• This is not a documentation update