By default Rails assumes that you have your files precompiled in the production environment, if you want use live compiling (compile your assets during runtime) in production you must set the config.assets.compile to true. # config/environments/production.rb … config.assets.compile = true … You can use this option to fallback to Sprockets when you are using precompiled … Read more
I ran into a similar problem when trying to use the JQuery generator for Rails 3 I solved it like this: Get the CURL Certificate Authority (CA) bundle. You can do this with: sudo port install curl-ca-bundle [if you are using MacPorts] or just pull it down directly wget http://curl.haxx.se/ca/cacert.pem Execute the ruby code that … Read more
A member route will require an ID, because it acts on a member. A collection route doesn’t because it acts on a collection of objects. Preview is an example of a member route, because it acts on (and displays) a single object. Search is an example of a collection route, because it acts on (and … Read more
Assuming fairly recent version of Rails you can always run: rake db:migrate:up VERSION=20090408054532 Where version is the timestamp in the filename of the migration. Edit: At some point over the last 8 years (I’m not sure what version) Rails added checks that prevent this from running if it has already been run. This is indicated … Read more
Use .drop(1). This has the benefit of returning a new Array with the first element removed, as opposed to using .shift, which returns the removed element, not the Array with the first element removed. NOTE: It does not affect/mutate the original Array. a = [0,1,2,3] a.drop(1) # => [1, 2, 3] a # => [0,1,2,3] … Read more
This https://github.com/rails/strong_parameters seems like the relevant section of the docs: The permitted scalar types are String, Symbol, NilClass, Numeric, TrueClass, FalseClass, Date, Time, DateTime, StringIO, IO, ActionDispatch::Http::UploadedFile and Rack::Test::UploadedFile. To declare that the value in params must be an array of permitted scalar values map the key to an empty array: params.permit(:id => []) In … Read more
I’ve used the extremely popular Whenever on projects that rely heavily on scheduled tasks, and it’s great. It gives you a nice DSL to define your scheduled tasks instead of having to deal with crontab format. From the README: Whenever is a Ruby gem that provides a clear syntax for writing and deploying cron jobs. … Read more
Assuming you’re looking to kill whatever is on port 3000 (which is what webrick normally uses), type this in your terminal to find out the PID of the process: $ lsof -wni tcp:3000 Then, use the number in the PID column to kill the process: $ kill -9 PID
I remember my CompSci professor saying never to use floats for currency. The reason for that is how the IEEE specification defines floats in binary format. Basically, it stores sign, fraction and exponent to represent a Float. It’s like a scientific notation for binary (something like +1.43*10^2). Because of that, it is impossible to store … Read more
Here’s how you should do it: change_column :users, :admin, :boolean, :default => false But some databases, like PostgreSQL, will not update the field for rows previously created, so make sure you update the field manaully on the migration too.