Module: Paperclip::Helpers

Included in:
Paperclip
Defined in:
lib/paperclip/helpers.rb

Instance Method Summary collapse

Instance Method Details

#class_for(class_name) ⇒ Object 



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# File 'lib/paperclip/helpers.rb', line 48

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| ... } ⇒ Object

Yields:

  • (_self)

Yield Parameters:



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# File 'lib/paperclip/helpers.rb', line 5

def configure
  yield(self) if block_given?
end

#each_instance_with_attachment(klass, name) ⇒ Object

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



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# File 'lib/paperclip/helpers.rb', line 42

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

#imagemagick7? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/paperclip/helpers.rb', line 62

def imagemagick7?
  return @imagemagick7 if instance_variable_defined?(:@imagemagick7)

  @imagemagick7 = !!which("magick")
end

#interpolates(key, &block) ⇒ Object 



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# File 'lib/paperclip/helpers.rb', line 9

def interpolates(key, &block)
  Paperclip::Interpolations[key] = block
end

#reset_duplicate_clash_check! ⇒ Object 



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# File 'lib/paperclip/helpers.rb', line 58

def reset_duplicate_clash_check!
  @names_url = nil
end

#run(cmd, arguments = "", interpolation_values = {}, local_options = {}) ⇒ Object

The run method takes the name of a binary to run, the arguments to that binary, the values to interpolate and some local options.

:cmd -> The name of a binary to run.

:arguments -> The command line arguments to that binary.

:interpolation_values -> Values to be interpolated into the arguments.

:local_options -> The options to be used by Cocain::CommandLine.
                  These could be: runner
                                  logger
                                  swallow_stderr
                                  expected_outcodes
                                  environment
                                  runner_options



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# File 'lib/paperclip/helpers.rb', line 30

def run(cmd, arguments = "", interpolation_values = {}, local_options = {})
  command_path = options[:command_path]
  terrapin_path_array = Terrapin::CommandLine.path.try(:split, Terrapin::OS.path_separator)
  Terrapin::CommandLine.path = [terrapin_path_array, command_path].flatten.compact.uniq
  if logging? && (options[:log_command] || local_options[:log_command])
    local_options = local_options.merge(logger: logger)
  end
  Terrapin::CommandLine.new(cmd, arguments, local_options).run(interpolation_values)
end

#which(cmd) ⇒ Object

github.com/minimagick/minimagick/blob/master/lib/mini_magick/utilities.rb#L9-L24



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# File 'lib/paperclip/helpers.rb', line 69

def which(cmd)
  exts = ENV["PATHEXT"] ? ENV["PATHEXT"].split(";") : [""]
  (ENV["PATH"] || "").split(File::PATH_SEPARATOR).each do |path|
    exts.each do |ext|
      exe = File.join(path, "#{cmd}#{ext}")
      return exe if File.executable? exe
    end
  end
  nil
end