'RailsAdmin::ImportmapFormatter#format': undefined method 'gsub!' for nil #3726
Description
Describe the bug
When I run rails g rails_admin:install I get this error:
~/c4s$ rails g rails_admin:install
? Where do you want to mount rails_admin? Press <enter> for [admin] >
route mount RailsAdmin::Engine => '/admin', as: 'rails_admin'
create config/initializers/rails_admin.rb
- Using [importmap] for asset delivery method
run yarn add [email protected] from "."
create app/javascript/rails_admin.js
/home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/rails_admin-3.3.0/lib/generators/rails_admin/importmap_formatter.rb:17:in 'RailsAdmin::ImportmapFormatter#format': undefined method 'gsub!' for nil (NoMethodError)
imports['@popperjs/core'].gsub!('lib/index.js', 'dist/esm/popper.js')
^^^^^^
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/rails_admin-3.3.0/lib/generators/rails_admin/install_generator.rb:100:in 'RailsAdmin::InstallGenerator#configure_for_importmap'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/rails_admin-3.3.0/lib/generators/rails_admin/install_generator.rb:33:in 'RailsAdmin::InstallGenerator#install'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor/command.rb:28:in 'Thor::Command#run'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor/invocation.rb:127:in 'Thor::Invocation#invoke_command'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor/invocation.rb:134:in 'block in Thor::Invocation#invoke_all'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor/invocation.rb:134:in 'Hash#each'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor/invocation.rb:134:in 'Enumerable#map'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor/invocation.rb:134:in 'Thor::Invocation#invoke_all'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor/group.rb:243:in 'Thor::Group.dispatch'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor/base.rb:584:in 'Thor::Base::ClassMethods#start'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/railties-8.0.2.1/lib/rails/generators.rb:265:in 'Rails::Generators.invoke'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/railties-8.0.2.1/lib/rails/commands/generate/generate_command.rb:26:in 'Rails::Command::GenerateCommand#perform'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor/command.rb:28:in 'Thor::Command#run'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor/invocation.rb:127:in 'Thor::Invocation#invoke_command'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/railties-8.0.2.1/lib/rails/command/base.rb:178:in 'Rails::Command::Base#invoke_command'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor.rb:538:in 'Thor.dispatch'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/railties-8.0.2.1/lib/rails/command/base.rb:73:in 'Rails::Command::Base.perform'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/railties-8.0.2.1/lib/rails/command.rb:65:in 'block in Rails::Command.invoke'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/railties-8.0.2.1/lib/rails/command.rb:143:in 'Rails::Command.with_argv'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/railties-8.0.2.1/lib/rails/command.rb:63:in 'Rails::Command.invoke'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/railties-8.0.2.1/lib/rails/commands.rb:18:in '<main>'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/3.4.0/bundled_gems.rb:82:in 'Kernel.require'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/3.4.0/bundled_gems.rb:82:in 'block (2 levels) in Kernel#replace_require'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/bootsnap-1.18.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in 'Kernel#require'
from bin/rails:4:in '<main>'
Reproduction steps
Create a Rails 8 project.
Add rails_admin 3.3.0
Run rails g rails_admin:install
Expected behavior
The install runs without error.
Additional context
railsversion: 8.0.2.1rails_adminversion: 3.3.0rails_adminnpm package version: I don't know- full stack trace:
/home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/rails_admin-3.3.0/lib/generators/rails_admin/importmap_formatter.rb:17:in 'RailsAdmin::ImportmapFormatter#format': undefined method 'gsub!' for nil (NoMethodError)
imports['@popperjs/core'].gsub!('lib/index.js', 'dist/esm/popper.js')
^^^^^^
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/rails_admin-3.3.0/lib/generators/rails_admin/install_generator.rb:100:in 'RailsAdmin::InstallGenerator#configure_for_importmap'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/rails_admin-3.3.0/lib/generators/rails_admin/install_generator.rb:33:in 'RailsAdmin::InstallGenerator#install'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor/command.rb:28:in 'Thor::Command#run'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor/invocation.rb:127:in 'Thor::Invocation#invoke_command'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor/invocation.rb:134:in 'block in Thor::Invocation#invoke_all'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor/invocation.rb:134:in 'Hash#each'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor/invocation.rb:134:in 'Enumerable#map'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor/invocation.rb:134:in 'Thor::Invocation#invoke_all'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor/group.rb:243:in 'Thor::Group.dispatch'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor/base.rb:584:in 'Thor::Base::ClassMethods#start'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/railties-8.0.2.1/lib/rails/generators.rb:265:in 'Rails::Generators.invoke'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/railties-8.0.2.1/lib/rails/commands/generate/generate_command.rb:26:in 'Rails::Command::GenerateCommand#perform'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor/command.rb:28:in 'Thor::Command#run'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor/invocation.rb:127:in 'Thor::Invocation#invoke_command'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/railties-8.0.2.1/lib/rails/command/base.rb:178:in 'Rails::Command::Base#invoke_command'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/thor-1.4.0/lib/thor.rb:538:in 'Thor.dispatch'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/railties-8.0.2.1/lib/rails/command/base.rb:73:in 'Rails::Command::Base.perform'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/railties-8.0.2.1/lib/rails/command.rb:65:in 'block in Rails::Command.invoke'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/railties-8.0.2.1/lib/rails/command.rb:143:in 'Rails::Command.with_argv'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/railties-8.0.2.1/lib/rails/command.rb:63:in 'Rails::Command.invoke'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/railties-8.0.2.1/lib/rails/commands.rb:18:in '<main>'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/3.4.0/bundled_gems.rb:82:in 'Kernel.require'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/3.4.0/bundled_gems.rb:82:in 'block (2 levels) in Kernel#replace_require'
from /home/pupeno/.rbenv/versions/3.4.5/lib/ruby/gems/3.4.0/gems/bootsnap-1.18.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in 'Kernel#require'
from bin/rails:4:in '<main>'
Similar to #3694