[Fix] Rails Admin - undefined local variable or method javascript_importmap_shim_nonce_configuration_tag

09 May 12:43

1 min. read

This content has been automatically translated from Ukrainian.

After updating Ruby Gems, an error occurred on the Rails Admin page.

undefined local variable or method `javascript_importmap_shim_nonce_configuration_tag' for #<ActionView::Base:0x00000000017908>

NameError in RailsAdmin::Main#dashboard

Showing /Users/user/.rbenv/versions/3.2.1/lib/ruby/gems/3.2.0/gems/rails_admin-3.1.2/app/views/layouts/rails_admin/_head.html.erb where line #22 raised:
undefined local variable or method `javascript_importmap_shim_nonce_configuration_tag' for #<ActionView::Base:0x00000000017908>
Extracted source (around line #22):

undefined local variable or method `javascript_importmap_shim_nonce_configuration_tag' for #<ActionView::Base:0x00000000017908>

This happened due to the update to the major version of importmap-rails.

So currently the simplest fix is to lock the version in the Gemfile:

gem "importmap-rails", "~> 1.1.5"

Then:

bundle install

And Rails Admin should work. I haven't read in detail the benefits of updating to importmap-rails, but evidently Rails Admin does not currently support this version. So we need to wait a bit for the update of this library.