Module: Hydra::Models::FileAsset

Extended by:
ActiveSupport::Concern
Included in:
FileAsset
Defined in:
lib/hydra/models/file_asset.rb

Overview

Defines Behaviors for a FileAsset Model Conforms to the Hydra genericContent cModel – the “content” is in a datastream called content TODO: Could we just move this behavior into app/models/file_asset.rb?

Instance Method Summary collapse

Instance Method Details

#add_file_datastream(file, opts = {}) ⇒ Object

augments add_file_datastream to also put file size (in bytes/KB/MB/GB/TB) in dc:extent



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# File 'lib/hydra/models/file_asset.rb', line 42

def add_file_datastream(file, opts={})
  super
  if file.respond_to?(:size)
    size = bits_to_human_readable(file.size)
  elsif file.kind_of?(File)
    size = bits_to_human_readable(File.size(file))
  else
    size = ""
  end
  datastreams["descMetadata"].extent = size
end

#bits_to_human_readable(num) ⇒ Object

Returns a human readable filesize appropriate for the given number of bytes (ie. automatically chooses ‘bytes’,‘KB’,‘MB’,‘GB’,‘TB’) Based on a bit of python code posted here: blogmag.net/blog/read/38/Print_human_readable_file_size

Parameters:

  • num (Numeric) —

    file size in bits



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# File 'lib/hydra/models/file_asset.rb', line 21

def bits_to_human_readable(num)
    ['bytes','KB','MB','GB','TB'].each do |x|
      if num < 1024.0
        return "#{num.to_i} #{x}"
      else
        num = num/1024.0
      end
    end
end

#label ⇒ Object 



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# File 'lib/hydra/models/file_asset.rb', line 32

def label
  descMetadata.title.first
end

#label=(label) ⇒ Object 



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# File 'lib/hydra/models/file_asset.rb', line 36

def label=(label)
  super
  descMetadata.title = label
end

#to_solr(solr_doc = Hash.new, opts = {}) ⇒ Object

Override ActiveFedora::Base.to_solr to… Check if we are dealing with a child of FileAsset and if so when calling to_solr from Solrizer indexer we want to skip loading parent metadata again

if known models greater than one (without ActiveFedora::Base) and

known models contains a child of FileAsset and
opts[:model_only] == true and
current object class is FileAsset

that means that the child already has had to_solr called which included metadata from FileAsset if any of the above is false then call to_solr as normal



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# File 'lib/hydra/models/file_asset.rb', line 63

def to_solr(solr_doc=Hash.new, opts={})

  active_fedora_model_s = solr_doc["active_fedora_model_s"] if solr_doc["active_fedora_model_s"]
  actual_class = active_fedora_model_s.constantize if active_fedora_model_s
  if actual_class && actual_class != self.class && actual_class.superclass == ::FileAsset
    solr_doc
  else
    super(solr_doc,opts)
  end
end