I have a fragment of JavaScript that I want to add to a page, but only in the production environment. Does rails have a way to insert or conditionally include on deployment. I know I could do "if Rails.env.production?" But I'd rather not do this condition check every time the page is loaded.
Script written in ERB, a templating language for Ruby; may include any type of plain text or source code, but also includes Ruby ERB code that generates additional text into the resulting file when run with the ERB template engine. ERB is often used for templating Web files such as . RB, .
An ERB object works by building a chunk of Ruby code that will output the completed template when run. If safe_level is set to a non-nil value, ERB code will be run in a separate thread with $SAFE set to the provided level. eoutvar can be used to set the name of the variable ERB will build up its output in.
An ERB template looks like a plain-text document interspersed with tags containing Ruby code. When evaluated, this tagged code can modify text in the template. Puppet passes data to templates via special objects and variables, which you can use in the tagged Ruby code to control the templates' output.
I wouldn't be worried about the overhead of one if
statement.
Why not use a custom helper method:
def snippet
if RAILS_ENV == "production"
javascript_tag "whatever"
elsif . . .
end
then you can use the same syntax:
<%= snippet %>
and you get a couple benefits:
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