Options support the same options as filters themselves (and support
symbols, string, procs, and objects), so compile a conditional expression
based on the options
# File activesupport/lib/active_support/callbacks.rb, line 257
def _compile_options(options)
return [] if options[:if].empty? && options[:unless].empty?
conditions = []
unless options[:if].empty?
conditions << Array.wrap(_compile_filter(options[:if]))
end
unless options[:unless].empty?
conditions << Array.wrap(_compile_filter(options[:unless])).map {|f| "!#{f}"}
end
["if #{conditions.flatten.join(" && ")}", "end"]
end
