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Some setup you must do manually if you haven't yet:
1. Setup default url options for your specific environment. Here is
an
example of development environment:
config.action_mailer.default_url_options = { :host =>
'localhost:3000' }
This is a required Rails configuration. In production it must be
the
actual host of your application
2. Ensure you have defined root_url to *something* in your
config/routes.rb.
For example:
root :to => "home#index"
3. Ensure you have flash messages in
app/views/layouts/application.html.erb.
For example:
<p class="notice"><%= notice %></p>
<p class="alert"><%= alert %></p>
4. If you are deploying Rails 3.1 on Heroku, you may want to set:
config.assets.initialize_on_precompile = false
On config/application.rb forcing your application to not access
the DB
or load models when precompiling your assets.
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Tyler Renelle