Issues I have found when doing Ruby on Rails upgrades of Ruby version 1.8.7 to 2.2 or 2.1:
View or Extract a file from different git branch
I have three different ways of getting files from other branches.
1) Checkout the file from the other branch
git checkout other-branch app/views/customers/index.html.erb
Ruby on Rails CORS setup for Heroku with Passenger 5.0.28
If you are using cloudfront with Heroku, chances are you will encounter some problems if you are using something like font-awesome. I won’t go into the details of how to setup cloudfont, but your heroku passenger should have the following. First, read the Passenger Documentation for Nginx configuration template.
These are the correct steps:
1. Copy the default ngnix config
Do this in the root directory of your Rails application.
cp $(passenger-config about resourcesdir)/templates/standalone/config.erb config/passenger_config.erb
Find a Ruby hash key by value
Let’s take a very simple Ruby hash with some US state abbreviations to their names
us_states = {
'AK' => 'Alaska',
'AL' => 'Alabama',
'AR' => 'Arkansas',
'AZ' => 'Arizona',
'CA' => 'California',
'CO' => 'Colorado',
'CT' => 'Connecticut'
}
Don’t use Rails.env.development? to determine paperclip file location.
I recently ran into this following code in a project that I inherited:
def get_company_doc_file(company_doc)
if Rails.env.development?
company_doc.company_file.path
else
company_doc.company_file.url
end
end
Browserify-rails vs react-rails: Winner both
Recently, I have installed browserify-rails and react-rails together in the same Ruby on Rails project. This give the best of both worlds since I can still use the react_component helper provided by react-rails but use npm to manage my versions of different React.js components. However, if you install react-rails, make sure you do not run any of the generators.
How to upgrade the Node.js version using NPM
The relationship between NPM and Node.js is always blurry to me. Whenever I have to upgrade my version of node, I am always a little confused so I’m adding this here for reference:
Before:
$ node --version
v5.8.0
LoadError – cannot load such file — coffee_script
If you have recently removed ‘coffee-rails’ from your project and locally, you are getting the error LoadError - cannot load such file -- coffee_script
You need to clear the local cache:
rake tmp:cache:clear
My git essentials
Aliases
I add the following to the bottom of my ~/.gitconfig
[alias]
st = status
ci = commit
co = checkout
br = branch --sort=committerdat
Golang Collect/Map function for Arrays and Slices
Because Google Go (Golang) is not a functional language, it does not include a standard library full of functional utilities like map/filter/all/any. With a little of coding, we accomplish this in a few lines.