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module CarrierWave
module Uploader
module Store
extend ActiveSupport::Concern
include CarrierWave::Uploader::Callbacks
include CarrierWave::Uploader::Configuration
include CarrierWave::Uploader::Cache
included do
prepend Module.new {
def initialize(*)
super
@file, @filename, @cache_id = nil
end
}
end
##
# Override this in your Uploader to change the filename.
#
# Be careful using record ids as filenames. If the filename is stored in the database
# the record id will be nil when the filename is set. Don't use record ids unless you
# understand this limitation.
#
# Do not use the version_name in the filename, as it will prevent versions from being
# loaded correctly.
#
# === Returns
#
# [String] a filename
#
def filename
@filename
end
##
# Calculates the path where the file should be stored. If +for_file+ is given, it will be
# used as the filename, otherwise +CarrierWave::Uploader#filename+ is assumed.
#
# === Parameters
#
# [for_file (String)] name of the file <optional>
#
# === Returns
#
# [String] the store path
#
def store_path(for_file=filename)
File.join([store_dir, full_filename(for_file)].compact)
end
##
# Stores the file by passing it to this Uploader's storage engine.
#
# If new_file is omitted, a previously cached file will be stored.
#
# === Parameters
#
# [new_file (File, IOString, Tempfile)] any kind of file object
#
def store!(new_file=nil)
cache!(new_file) if new_file && ((@cache_id != parent_cache_id) || @cache_id.nil?)
if !cache_only and @file and @cache_id
with_callbacks(:store, new_file) do
new_file = storage.store!(@file)
if delete_tmp_file_after_storage
@file.delete unless move_to_store
cache_storage.delete_dir!(cache_path(nil))
end
@file = new_file
@cache_id = nil
end
end
end
##
# Retrieves the file from the storage.
#
# === Parameters
#
# [identifier (String)] uniquely identifies the file to retrieve
#
def retrieve_from_store!(identifier)
with_callbacks(:retrieve_from_store, identifier) do
@file = storage.retrieve!(identifier)
end
end
private
def full_filename(for_file)
for_file
end
def storage
@storage ||= self.class.storage.new(self)
end
end # Store
end # Uploader
end # CarrierWave
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