module Paperclip::Helpers

Public Instance Methods

check_for_url_clash(name,url,klass) click to toggle source
# File lib/paperclip/helpers.rb, line 52
def check_for_url_clash(name,url,klass)
  @names_url ||= {}
  default_url = url || Attachment.default_options[:url]
  if @names_url[name] && @names_url[name][:url] == default_url && @names_url[name][:class] != klass && @names_url[name][:url] !~ %r:class/
    log("Duplicate URL for #{name} with #{default_url}. This will clash with attachment defined in #{@names_url[name][:class]} class")
  end
  @names_url[name] = {:url => default_url, :class => klass}
end
class_for(class_name) click to toggle source
# File lib/paperclip/helpers.rb, line 42
def class_for(class_name)
  class_name.split('::').inject(Object) do |klass, partial_class_name|
    if klass.const_defined?(partial_class_name)
      klass.const_get(partial_class_name, false)
    else
      klass.const_missing(partial_class_name)
    end
  end
end
configure() { |self| ... } click to toggle source
# File lib/paperclip/helpers.rb, line 3
def configure
  yield(self) if block_given?
end
each_instance_with_attachment(klass, name) { |instance| ... } click to toggle source

Find all instances of the given Active Record model klass with attachment name. This method is used by the refresh rake tasks.

# File lib/paperclip/helpers.rb, line 36
def each_instance_with_attachment(klass, name)
  class_for(klass).unscoped.where("#{name}_file_name IS NOT NULL").find_each do |instance|
    yield(instance)
  end
end
interpolates(key, &block) click to toggle source
# File lib/paperclip/helpers.rb, line 7
def interpolates key, &block
  Paperclip::Interpolations[key] = block
end
reset_duplicate_clash_check!() click to toggle source
# File lib/paperclip/helpers.rb, line 61
def reset_duplicate_clash_check!
  @names_url = nil
end
run(cmd, arguments = "", interpolation_values = {}, local_options = {}) click to toggle source

The run method takes the name of a binary to run, the arguments to that binary and some options:

:command_path -> A $PATH-like variable that defines where to look for the binary
                 on the filesystem. Colon-separated, just like $PATH.

:expected_outcodes -> An array of integers that defines the expected exit codes
                      of the binary. Defaults to [0].

:log_command -> Log the command being run when set to true (defaults to false).
                This will only log if logging in general is set to true as well.

:swallow_stderr -> Set to true if you don't care what happens on STDERR.
# File lib/paperclip/helpers.rb, line 25
def run(cmd, arguments = "", interpolation_values = {}, local_options = {})
  command_path = options[:command_path]
  Cocaine::CommandLine.path = [Cocaine::CommandLine.path, command_path].flatten.compact.uniq
  if logging? && (options[:log_command] || local_options[:log_command])
    local_options = local_options.merge(:logger => logger)
  end
  Cocaine::CommandLine.new(cmd, arguments, local_options).run(interpolation_values)
end