Setting a variable based on Rails environment

Question

I'm using rails 3 and I would like to set the storage variable based on the current environment, like below:

 #if enviroment = development or test 
    :storage => :filesystem,
    #else
    :storage => :s3,
    #end

What would your approach be? I've thought about setting an environment variable, but I think that there must be a better way.

Thanks for your time Simone

Jesse Wolgamott · Accepted Answer · 2011-07-30 12:55:37Z

9

One way to do this is use the built-in environment setup in rails. The variables set in the environments directory will override the config/environment

config/environment.rb

ATTACHMENT_OPTIONS = {:storage => :filesystem}

config/environments/production.rb

ATTACHMENT_OPTIONS = {:storage => :s3}

Then later in your app, just ask ATTACHMENT_OPTIONS[:storage] -- no if/else throughout your app.

answered Jul 30, 2011 at 12:55

Jesse Wolgamott

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Charles Ma · Accepted Answer · 2011-07-30 12:46:12Z

8

Rails.env will give you what you're looking for.

You can also use

Rails.env.development?
Rails.env.test?
Rails.env.production?
Rails.env.your_custom_environment?

To test for those specific environments.

answered Jul 30, 2011 at 12:46

Charles Ma

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3 Comments

Simone Di Cola Over a year ago

Thank you! I have to put the test inside a model, and with Netbeans I always got an error. Here the code: has_attached_file :avatar, :path => ":attachment/:id/:style.:extension", :url => "/:attachment/:id/:style.:extension", :default_url => '/:attachment/missing_:style.jpg', :styles => { :small => "80x80>", :thumb => "100x100>" }, if (Rails.env.development? or Rails.env.test?) :storage => :filesystem else :storage => :s3 end :default_style => :thumb, :bucket => 'josha_pictures', :s3_credentials => { :access_key_id => ENV['S3_KEY'], :

Charles Ma Over a year ago

What's the error? and would you mind editing your question and putting the code there?

Michał Szajbe Over a year ago

why not use ternary operator instead of if/else? :storage => (Rails.env.development? || Rails.env.test?) ? :filesystem : :s3

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