Module: CurationConcerns::CollectionBehavior

Extended by:
ActiveSupport::Concern
Includes:
HasRepresentative, HumanReadableType, Noid, Permissions, Hydra::AccessControls::WithAccessRight, Hydra::Collection
Included in:
Collection
Defined in:
app/models/concerns/curation_concerns/collection_behavior.rb

Defined Under Namespace

Modules: ClassMethods

Instance Method Summary collapse

Methods included from Permissions::Readable

#private?, #public?, #registered?

Methods included from Permissions::Writable

#paranoid_edit_permissions, #paranoid_permissions

Methods included from HumanReadableType

#human_readable_type, #to_solr

Methods included from Noid

#assign_id, #to_param

Instance Method Details

#add_member(collectible) ⇒ Object 



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# File 'app/models/concerns/curation_concerns/collection_behavior.rb', line 16

def add_member(collectible)
  return unless can_add_to_members?(collectible)
  members << collectible
  save
end

#bytes ⇒ Fixnum

Compute the sum of each file in the collection using Solr to avoid having to access Fedora

Returns:

  • (Fixnum) —

    size of collection in bytes

Raises:

  • (RuntimeError) —

    unsaved record does not exist in solr



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# File 'app/models/concerns/curation_concerns/collection_behavior.rb', line 41

def bytes
  return 0 if member_ids.count == 0

  raise "Collection must be saved to query for bytes" if new_record?

  # One query per member_id because Solr is not a relational database
  sizes = member_ids.collect do |work_id|
    query = ActiveFedora::SolrQueryBuilder.construct_query_for_rel(has_model: ::FileSet.to_class_uri)
    argz = { fl: "id, #{file_size_field}",
             fq: "{!join from=#{member_ids_field} to=id}id:#{work_id}"
    }
    files = ActiveFedora::SolrService.query(query, argz)
    files.reduce(0) { |sum, f| sum + f[file_size_field].to_i }
  end

  sizes.reduce(0, :+)
end

#can_be_member_of_collection?(collection) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/concerns/curation_concerns/collection_behavior.rb', line 26

def can_be_member_of_collection?(collection)
  collection != self
end

#to_s ⇒ Object 



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# File 'app/models/concerns/curation_concerns/collection_behavior.rb', line 22

def to_s
  title.present? ? title : 'No Title'
end