Class: CarrierWave::Mounter

Inherits:
Object
  • Object
show all
Defined in:
lib/carrierwave/mounter.rb

Overview

this is an internal class, used by CarrierWave::Mount so that we don’t pollute the model with a lot of methods.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(record, column, options = {}) ⇒ Mounter

Returns a new instance of Mounter.



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# File 'lib/carrierwave/mounter.rb', line 10

def initialize(record, column, options={})
  @record = record
  @column = column
  @options = record.class.uploader_options[column]
  @download_errors = []
  @processing_errors = []
  @integrity_errors = []
end

Instance Attribute Details

#column ⇒ Object (readonly)

:nodoc:



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# File 'lib/carrierwave/mounter.rb', line 6

def column
  @column
end

#download_errors ⇒ Object (readonly)

:nodoc:



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# File 'lib/carrierwave/mounter.rb', line 6

def download_errors
  @download_errors
end

#integrity_errors ⇒ Object (readonly)

:nodoc:



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# File 'lib/carrierwave/mounter.rb', line 6

def integrity_errors
  @integrity_errors
end

#processing_errors ⇒ Object (readonly)

:nodoc:



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# File 'lib/carrierwave/mounter.rb', line 6

def processing_errors
  @processing_errors
end

#record ⇒ Object (readonly)

:nodoc:



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# File 'lib/carrierwave/mounter.rb', line 6

def record
  @record
end

#remote_request_headers ⇒ Object

Returns the value of attribute remote_request_headers.



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# File 'lib/carrierwave/mounter.rb', line 8

def remote_request_headers
  @remote_request_headers
end

#remote_urls ⇒ Object

:nodoc:



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# File 'lib/carrierwave/mounter.rb', line 6

def remote_urls
  @remote_urls
end

#remove ⇒ Object

Returns the value of attribute remove.



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# File 'lib/carrierwave/mounter.rb', line 8

def remove
  @remove
end

#uploader_options ⇒ Object

Returns the value of attribute uploader_options.



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# File 'lib/carrierwave/mounter.rb', line 160

def uploader_options
  @uploader_options
end

Instance Method Details

#blank? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/carrierwave/mounter.rb', line 111

def blank?
  uploaders.none?(&:present?)
end

#blank_uploader ⇒ Object 



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# File 'lib/carrierwave/mounter.rb', line 23

def blank_uploader
  uploader_class.new(record, column)
end

#cache(new_files) ⇒ Object 



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# File 'lib/carrierwave/mounter.rb', line 43

def cache(new_files)
  return if !new_files.is_a?(Array) && new_files.blank?
  old_uploaders = uploaders
  @uploaders = new_files.map do |new_file|
    handle_error do
      if new_file.is_a?(String)
        if (uploader = old_uploaders.detect { |uploader| uploader.identifier == new_file })
          uploader.staged = true
          uploader
        else
          begin
            uploader = blank_uploader
            uploader.retrieve_from_cache!(new_file)
            uploader
          rescue CarrierWave::InvalidParameter
            nil
          end
        end
      else
        uploader = blank_uploader
        uploader.cache!(new_file)
        uploader
      end
    end
  end.compact
end

#cache_names ⇒ Object 



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# File 'lib/carrierwave/mounter.rb', line 70

def cache_names
  uploaders.map(&:cache_name).compact
end

#cache_names=(cache_names) ⇒ Object 



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# File 'lib/carrierwave/mounter.rb', line 74

def cache_names=(cache_names)
  return if cache_names.blank?
  clear_unstaged
  cache_names.map do |cache_name|
    begin
      uploader = blank_uploader
      uploader.retrieve_from_cache!(cache_name)
      @uploaders << uploader
    rescue CarrierWave::InvalidParameter
      # ignore
    end
  end
end

#clear! ⇒ Object 



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# File 'lib/carrierwave/mounter.rb', line 124

def clear!
  @uploaders = []
end

#identifiers ⇒ Object 



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# File 'lib/carrierwave/mounter.rb', line 27

def identifiers
  uploaders.map(&:identifier)
end

#read_identifiers ⇒ Object 



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# File 'lib/carrierwave/mounter.rb', line 31

def read_identifiers
  [record.read_uploader(serialization_column)].flatten.reject(&:blank?)
end

#remove! ⇒ Object 



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# File 'lib/carrierwave/mounter.rb', line 119

def remove!
  uploaders.reject(&:blank?).each(&:remove!)
  @uploaders = []
end

#remove? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/carrierwave/mounter.rb', line 115

def remove?
  remove.present? && remove !~ /\A0|false$\z/
end

#remove_previous(before = nil, after = nil) ⇒ Object 



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# File 'lib/carrierwave/mounter.rb', line 132

def remove_previous(before=nil, after=nil)
  after ||= []
  return unless before

  # both 'before' and 'after' can be string when 'mount_on' option is set
  before = before.reject(&:blank?).map do |value|
    if value.is_a?(String)
      uploader = blank_uploader
      uploader.retrieve_from_store!(value)
      uploader
    else
      value
    end
  end
  after_paths = after.reject(&:blank?).map do |value|
    if value.is_a?(String)
      uploader = blank_uploader
      uploader.retrieve_from_store!(value)
      uploader
    else
      value
    end.path
  end
  before.each do |uploader|
    uploader.remove! if uploader.remove_previously_stored_files_after_update && !after_paths.include?(uploader.path)
  end
end

#serialization_column ⇒ Object 



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# File 'lib/carrierwave/mounter.rb', line 128

def serialization_column
  option(:mount_on) || column
end

#store! ⇒ Object 



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# File 'lib/carrierwave/mounter.rb', line 103

def store!
  uploaders.reject(&:blank?).each(&:store!)
end

#uploader_class ⇒ Object 



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# File 'lib/carrierwave/mounter.rb', line 19

def uploader_class
  record.class.uploaders[column]
end

#uploaders ⇒ Object 



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# File 'lib/carrierwave/mounter.rb', line 35

def uploaders
  @uploaders ||= read_identifiers.map do |identifier|
    uploader = blank_uploader
    uploader.retrieve_from_store!(identifier) if identifier.present?
    uploader
  end
end

#urls(*args) ⇒ Object 



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# File 'lib/carrierwave/mounter.rb', line 107

def urls(*args)
  uploaders.map { |u| u.url(*args) }
end