I am following the Padrino tutorial from here:
https://www.padrinorb.com/guides/blog-tutorial
I am copy and pasting the commands but I quickly ran into an error I don't understand:
$ padrino g controller posts get:index get:show
create app/controllers/posts.rb
create app/views/posts
apply tests/shoulda
/Users/waprin/.rvm/gems/ruby-2.1.0/gems/padrino-gen-0.12.4/lib/padrino-gen/generators/controller.rb:66:in `prepend': can't modify frozen String (RuntimeError)
from /Users/waprin/.rvm/gems/ruby-2.1.0/gems/padrino-gen-0.12.4/lib/padrino-gen/generators/controller.rb:66:in `create_controller'
This might be a bit late, but in case anyone else runs across this error (and because I just worked through the same tutorial) I'll post anyway...
It looks like there's an issue when generating controllers if a test component is specified. In this case you're using shoulda, but the same happens when using rspec and maybe others. It's been reported as a bug: https://github.com/padrino/padrino-framework/issues/1850 and has been fixed, but isn't yet part of a stable release.
One option to fix this would be to change your Gemfile to work with the latest from their github repo. To do this delete your GemFile.lock file, and comment out the line under 'Padrino Stable Gem' in your GemFile:
gem 'padrino', '0.12.4'
then uncomment the line under 'Or Padrino Edge':
gem 'padrino', :github => 'padrino/padrino-framework'
then re-run bundle install.
Of course, you'll no longer be running the stable release, and that may come with other trade-offs.
As a side-note, I believe that the guide on that page is fairly out of date. I also needed to replace:
get :index do
#posts = Post.all(:order => 'created_at desc')
render 'posts/index'
end
with:
get :index, :provides => [:html, :rss, :atom] do
#posts = Post.order('created_at desc')
render 'posts/index'
end
in the Post controller as the active record interface has changed since the time that the guide was written.
I was able to sole this problem by simply going to padrino gem path.
For me it was:
/Users/ahmadhassan/.rvm/gems/ruby-2.2.0/gems/padrino-gen-0.12.4/lib/padrino-gen/generators
open controller.rb and change line number 61:
path = #controller
to
path = #controller.dup
I cannot see the apps running using 'Preview'.
The Ruby environment with the Rails framework is installed (able to see folders and files generated), and see application being built in Nitrous.IO IDE.
My installation shows I have the following installed:
- ruby 2.1.1p76
- Rails 4.1.0
- git version 2.0.0
- SQLite3
Building a simple blog app, I use the scaffold generator to create the MVC components needed for posts and comments:
1. $ rails generate scaffold post title:string body:text
2. $ rails generate scaffold comment post_id:integer body:text
I create the post and comment database tables using:
1. $ rake db:migrate
2. $ rake routes
3. $ rails server
Using 'Preview' to see app running on WEBrick, only get default webpage which says:
- "Routes are set up in the config/routes.rb"
- "running in development mode and haven't set a root route yet."
config/routes.rb file has the following:
Rails.application.routes.draw.do
resources :comments
resources :posts
# lines 6 -> 59 are comments giving coding examples of routes
end
==>> What do I need to do to 'Preview' Ruby apps??
Based on your comment above, I believe what you need to do is remove the public/index.html file and/or go to the route(s) you have created and specify one of them as root.
Also see this SO question and it's answer(s): deploying to heroku -- can't get rid of the "welcome to rails" default page
After you run rake routes command, it creates all the REST calls for you i.e. GET/POST/PUT/DELETE and as you have already created the scaffold you just need to invoke URL with the paths as /comment or /post and you will be able to access your blog application.
Ex: http://yourhost.com:3000/comment or http://yourhost.com:3000/post.
Everything goes well in local machine with assets pipeline in Rails 4 and Ruby 2.0. But when deploying to heroku, it is shown that:
-----> Preparing app for Rails asset pipeline
Running: rake assets:precompile
I, [2013-03-12T03:28:29.908234 #912] INFO -- : Writing /tmp/build_1n6yi8lwna3sj/public/assets/rails-2ee5a98f26fbf8c6c461127da73c47eb.png
I, [2013-03-12T03:28:29.914096 #912] INFO -- : Writing /tmp/build_1n6yi8lwna3sj/public/assets/trash-3c3c2861eca3747315d712bcfc182902.png
I, [2013-03-12T03:28:33.963234 #912] INFO -- : Writing /tmp/build_1n6yi8lwna3sj/public/assets/application-bf2525bd32aa2a7068dbcfaa591b3874.js
I, [2013-03-12T03:28:40.362850 #912] INFO -- : Writing /tmp/build_1n6yi8lwna3sj/public/assets/application-13374a65f29a3b4cea6f8da2816ce7ff.css
Asset precompilation completed (14.36s)
Heroku seems to compile files but put it in /tmp without any errors. My questions are:
How come Heroku compile assets files to /tmp?
My last solution was to run RAILS_ENV=production bundle exec rake assets:precompile locally, but this generated a manifest-xxxxxx.json in public/assets, rather than manifest.yml, so that heroku doesn't detect the JSON manifest file. I sorted it out by manually created a yml from the json file and heroku became happy. Has heroku's approach been outdated?
Heroku's asset plugins no longer work since Rails 4 does not support plugins. You need to use Heroku's asset gems instead. Place this in your Gemfile:
group :production do
gem 'rails_log_stdout', github: 'heroku/rails_log_stdout'
gem 'rails3_serve_static_assets', github: 'heroku/rails3_serve_static_assets'
end
Follow Heroku's guide on getting started with Rails 4.
Update (07/22/2013): Heroku now supplies a different gem to precompile assets.
group :production do
gem 'rails_12factor'
end
You need to config Rails to serve static assets in production: config/environments/production.rb
SampleApp::Application.configure do
.
.
.
config.serve_static_assets = true
.
.
.
end
UPDATE:
In Rails 4 is deprecated, and has been changed by:
config.serve_static_files = true
Since rails 4 replaced manifest.yml with manifest-(fingerprint).json, you'll want to enable static asset serving.
From Getting Started with Rails 4.x on Heroku:
gem 'rails_12factor', group: :production
then
bundle install
and, finally,
git push heroku
Fixed the issue for me. Hope this helps!
I run exactly into the same problem.
I set config.serve_static_assets = true in my environments/production.rb file until heroku wont't support the new manifest format.
So it is a temporal solution until heroku support will be added.
After hours of googling in which none of the guides on Heroku or the suggestions on StackOverFlow helped me, I finally ran into this blog post which offered this clue:
heroku labs:enable user-env-compile --app=YOUR_APP
Without this, the asset pipeline will always try to init the whole app and connect to the database (despite all the things you may have read that rails 4 now longer does this). This exposes your Heroku configuration to Rails so it can boot up successfully and run rake tasks like assets:precompile.
I needed to use this gem:
gem 'rails_12factor', group: :production #need this for rails 4 assets on heroku
And in /config/environments/production.rb I needed to set:
config.assets.compile = true
My understanding is that the rails_12_factor gem sets config.serve_static_assets = true, amongst other things.
In my case, assets compiled following the instructions above but it wasn't picking the bootstrap glyphicons 'fontawesome-webfont' so this worked for me finally after wasting so many hours researching.
Gem file
gem 'rails_12factor', group: :production
bundle install
config/application.rb
config.assets.precompile += %w(*.png *.jpg *.jpeg *.gif,
"fontawesome-webfont.ttf",
"fontawesome-webfont.eot",
"fontawesome-webfont.svg",
"fontawesome-webfont.woff")
config.assets.precompile << Proc.new do |path|
if path =~ /\.(css|js)\z/
full_path = Rails.application.assets.resolve(path).to_path
app_assets_path = Rails.root.join('app', 'assets').to_path
if full_path.starts_with? app_assets_path
puts "including asset: " + full_path
true
else
puts "excluding asset: " + full_path
false
end
else
false
end
end
environment/production.rb
config.serve_static_assets = true
Then finally, I ran
rake assets:precompile RAILS_ENV=production and pushed it to heroku and that worked.
This was an issue with the Heroku Ruby Buildpack, but an update was deployed today (2013-05-21). Please try it out and let us know.
To answer your questions:
#1) This is sprockets output; things are compiled to /tmp and then moved (See here in Sprockets). To my knowledge this has always been done this way, but it wasn't until Sprockets version was updated in Rails that we got this new debug-type output.
#2) Previously assets:precompile genereated a manifest.json file, but now in Rails 4 the manifest file has a fingerprint in it, which wasn't detected previously. This was fixed with #74.
I added this to the top of one of my css.scss files in the assets/stylesheets/ folder.
#import "font-awesome";
then ran..
rake assets:clean
and...
rake assets:precompile RAILS_ENV=production
In Rails 4.2.4 your production.rb has the line:
config.serve_static_files = ENV['RAILS_SERVE_STATIC_FILES'].present?
That means, gem 'rails_12factor', group: :production doesn`t need to change it to true, as it can be set through the heroku environment variables. You also will get a warning if you remove the rails_12factor gem.
If you have problems with assets, login to the heroku console heroku run rails console and find out the asset path for a file puts helper.asset_path("application.js") .
One strange behaviour I noticed between development and production, when the file ending is not provided:
With a image /assets/images/image_01.jpg the following output from asset_pathsdiffers:
Development:
development > puts helper.asset_path('profile_01')
=> /assets/profile_01-bbd16aac5ef1d295411af44c103fcc631ab90ee94957414d4c01c3aed1055714.jpg
development > puts helper.asset_path('profile_01.jpg')
=> /assets/profile_01-bbd16aac5ef1d295411af44c103fcc631ab90ee94957414d4c01c3aed1055714.jpg
Production:
development > puts helper.asset_path('profile_01')
=> /profile_01
development > puts helper.asset_path('profile_01.jpg')
=> /assets/profile_01-bbd16aac5ef1d295411af44c103fcc631ab90ee94957414d4c01c3aed1055714.jpg
You do not have to run RAILS_ENV=production rake assets:precompile, heroku does this for you during deploy. Also you do not have to precompile the assets in development and push them to heroku.
Apart from ensuring you have the 'rails_12factor' gem installed the only thing you need to do is this.
# config/application.rb
config.assets.paths << Rails.root.join('vendor', 'assets')
It seems that although Rails knows exactly what it wants, Heroku needs reminding to include the assets folder as part of the assets paths.
Use Image Extensions
I had this same issue, but for a different reason.
Instead of
<%= asset_path 'facebook-link' %>
Use:
<%= asset_path 'facebook-link.png' %>
While the first one worked locally, when I pushed to Heroku my images were breaking and I had no clue why. Using the full file extension fixed the problem :)
Add this gem gem 'rails_serve_static_assets'
https://github.com/heroku/rails_serve_static_assets
If you are using controller specific assets as in:
<%= javascript_include_tag params[:controller] %> or <%= javascript_include_tag params[:controller] %>
Then in production you will need to explicitly precompile those (in development rails compiles files on the fly).
See official Rails guide here: http://guides.rubyonrails.org/asset_pipeline.html#controller-specific-assets
To precompile as explained in the guides (here: http://guides.rubyonrails.org/asset_pipeline.html#precompiling-assets) you will need to add the following to the config/application.rb
# config/application.rb
config.assets.precompile << Proc.new do |path|
if path =~ /\.(css|js)\z/
full_path = Rails.application.assets.resolve(path).to_path
app_assets_path = Rails.root.join('app', 'assets').to_path
if full_path.starts_with? app_assets_path
puts "including asset: " + full_path
true
else
puts "excluding asset: " + full_path
false
end
else
false
end
end
I figure I'll add this as an answer since this question is linked from the Heroku Support page if you search for "assets".
This is mostly for people who are updating their app to Rails 4, but after going through this - and many other SO posts - what finally got me was changing the following in production.rb:
config.action_dispatch.x_sendfile_header = "X-Sendfile"
To:
config.action_dispatch.x_sendfile_header = nil
I hadn't caught this when I upgraded and as usual this took me forever to figure out. Hopefully it helps someone else! Shout out to PatrickEm who asked/answered the same in his question.
This may not answer the original question's root cause, But I was having a similar symptom with a different root cause.
Pre-compilation of a JPEG files changes the file extension to JPG, meaning that asset_path("my_image.jpeg") and asset_path("my_image") didn't work. Remove the "e" from JPEG and voila, it works.
Others have described the same problem here https://blazarblogs.wordpress.com/2016/04/06/rails-force-to-precompile-jpeg-to-jpg/
Is this a bug? Or desired behaviour? And also weird that it only doesn't work in my Heroku-hosted production environment. Maybe they have some sort of configuration.
Resque/Sidekiq come with a web frontend, which is a Sinatra app.
The way to mount this in a Rails app is to add this to routes (http://railscasts.com/episodes/366-sidekiq?view=asciicast):
mount Sidekiq::Web, at: "/sidekiq"
How do i mount this in a Padrino app?
Mapping it in config.ru like other Rack apps does not work
map '/sidekiq' do
run Sidekiq::Web
end
Padrino uses Padrino.mount which expects apps to respond to dependencies and setup_application. This hack (https://gist.github.com/1718723) allows you to mount a Sinatra application inside a Padrino application
Padrino app is a rack app and in config.ru you would see
require ::File.dirname(__FILE__) + '/config/boot.rb'
run Padrino.application
You can change this to use Rack::URLMap
require ::File.dirname(__FILE__) + '/config/boot.rb'
run Rack::URLMap.new("/sidekiq" => Sidekiq::Web.new, "/app" => Padrino.application.new)
Add gem 'sidekiq' to Gemfile
bundle install
Add following lines to config/boot.rb
Padrino.before_load do
Padrino.dependency_paths << Padrino.root('app/workers/*.rb')
end
Add following lines to config/apps.rb
require 'sidekiq/web'
Padrino.mount('Sidekiq', app_class: 'Sidekiq::Web', app_root: Sidekiq::Web.root).to('/sidekiq')
Create any worker in app/workers/
Run bundle exec sidekiq -r ./config/boot.rb
I'm trying to replace fixture generation with factories using rails3-generators:
https://github.com/indirect/rails3-generators#readme
The gem is included in my Gemfile and has been installed:
# Gemfile
gem 'rails3-generators', :group => :development
I added the following to application.rb:
# application.rb
config.generators do |g|
g.stylesheets false
g.fixture_replacement :factory_girl
end
Yet 'rails g model Insect' is still generating fixtures ('insects.yml'). Is this working for others using Rails 3.0.4 and rails3-generators 0.17.4?
'rails g' shows the new generators available (such as Authlogic and Koala), but 'rails g model' still lists fixtures and doesn't refer to factories.
What else should I add to get this to work? Thanks.
Edit: I ran the gem's test suite, which includes a test for this, and it passes. No clue why it doesn't work with my app.
Edit2: I tried again with a test project and get the same result: fixtures instead of factories. If anybody could confirm whether this works for them with Rails 3.0.4 and rails3-generators 0.17.4, that would be helpful too because it would imply that I'm doing something wrong with my projects.
Edit3: It works if I run 'rails g model Insect -r factory_girl'. I thought the generator configuration in application.rb was supposed to take care of that, so this seems to be the source of the problem.
Searching around I found the following, which may help:
Try specifying a directory option for factory_girl's factories:
config.generators do |g|
g.stylesheets false
g.fixture_replacement :factory_girl, :dir => "spec/factories" # or test/factories, as the case may be
end
If you're using Test::Unit, try the following:
config.generators do |g|
g.stylesheets false
g.test_framework :test_unit, :fixture_replacement => :factory_girl
end
In both cases you will still need the rails3-generators gem, although there is a push to get that functionality into factory_girl_rails.
This Rails bug indicates that, at some point, the g.fixture_replacement code may not have worked right. Perhaps a test in 3.0.5 is in order. :)
A short update 9 years later:
instead of "factory_girl_rails" (which is deprecated now) use "factory_bot_rails".
Now, the factory gets created automagically:
$ rails g model tester name:string
Running via Spring preloader in process 31467
invoke active_record
create db/migrate/20200327152901_create_testers.rb
create app/models/tester.rb
invoke rspec
create spec/models/tester_spec.rb
invoke factory_bot
create spec/factories/testers.rb
I use rails 5.2.4, but this should also work with rails 6.