#ruby-on-rails-3.1

Fix: Rails – Could not find a JavaScript runtime? #development #fix #answer

Rails – Could not find a JavaScript runtime?

I created a new Rails project using rails 3.1.0.rc4 on my local machine but when I try to start the server I get: Could not find a JavaScript runtime. See here for a list of available runtimes. (ExecJS::RuntimeUnavailable)

Note: This is not about Heroku.

Answer [by Gazler]: Rails – Could not find a JavaScript runtime?

Note from Michael 12/28/2011 – I…

How-to: Using Rails 3.1 assets pipeline to conditionally use certain css #answer #it #dev

Using Rails 3.1 assets pipeline to conditionally use certain css

I’m in the process of building my first solo Rails app using Rails 3.1.rc5. My problem is that I want to have my site render the various CSS files conditionally. I’m using Blueprint CSS and I’m trying to have sprockets/rails render screen.css most of the time, print.css only when printing, and ie.cssonly when the site is accessed…

How to: Rails 3.1: Engine vs. Mountable App

Rails 3.1: Engine vs. Mountable App

Can someone help me understand the differences between a Rails Engine and a Mountable app? In Rails 3.1, you can create either one with the “rails new plugin ___” command.

rails plugin new forum full # Engine rails plugin new forum mountable # Mountable App

When would you want to use one versus the other? I know you can package an Engine as a gem, for one. Is…

Fixed Using Rails 3.1, where do you put your "page specific" javascript code? #dev #it #asnwer

Using Rails 3.1, where do you put your "page specific" javascript code?

To my understanding, all of your javascript gets merged into 1 file. Rails does this by default when it adds //= require_tree . to the bottom of your application.js manifest file.

This sounds like a real life-saver, but I am a little concerned about page-specific javascript code. Does this code get executed on every page?…

Fixed ExecJS and could not find a JavaScript runtime #dev #it #asnwer

ExecJS and could not find a JavaScript runtime

I’m trying to use the Mongoid / Devise Rails 3.1 template (Mongoid and Devise), and I keep getting an error stating ExecJS cannot find a JavaScript runtime. Fair enough when I didn’t have any installed, but I’ve tried installing Node.js, Mustang and the Ruby Racer, but nothing is working.

I could not find a JavaScript runtime. See sstephenson/ExecJS

How to: execJs: 'Could not find a JavaScript runtime' but execjs AND therubyracer are in Gemfile

execJs: ‘Could not find a JavaScript runtime’ but execjs AND therubyracer are in Gemfile

I’m getting this error, like a lot of others:

rake aborted! Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs,

and have already spent more hours searching google then I will admit to. I believe this is an execJs bug, but what do i know? From all the posts, this is a very common…

How to: Rails – Could not find a JavaScript runtime?

Rails – Could not find a JavaScript runtime?

I created a new Rails project using rails 3.1.0.rc4 on my local machine but when I try to start the server I get: Could not find a JavaScript runtime. See here for a list of available runtimes. (ExecJS::RuntimeUnavailable)

Note: This is not about Heroku.

Answer: Rails – Could not find a JavaScript runtime?

Note from Michael 12/28/2011 – I have…

How to: Using Rails 3.1 assets pipeline to conditionally use certain css

Using Rails 3.1 assets pipeline to conditionally use certain css

I’m in the process of building my first solo Rails app using Rails 3.1.rc5. My problem is that I want to have my site render the various CSS files conditionally. I’m using Blueprint CSS and I’m trying to have sprockets/rails render screen.css most of the time, print.css only when printing, and ie.cssonly when the site is accessed…