Class: Assessment

Inherits:
Sequel::Model
  • Object
show all
Defined in:
backend/app/model/assessment.rb

Defined Under Namespace

Classes: TransferRepoAttribute

Constant Summary collapse

KEY_TO_TYPE = 
{
  'ratings' => 'rating',
  'formats' => 'format',
  'conservation_issues' => 'conservation_issue',
}

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.apply_attributes(obj, json) ⇒ Object 



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# File 'backend/app/model/assessment.rb', line 124

def self.apply_attributes(obj, json)
  # Add the appropriate list of attributes
  DB.open do |db|
    db[:assessment_attribute].filter(:assessment_id => obj.id).delete
    db[:assessment_attribute_note].filter(:assessment_id => obj.id).delete

    valid_attribute_ids = db[:assessment_attribute_definition]
                            .filter(:repo_id => [Repository.global_repo_id, active_repository])
                            .select(:id)
                            .map {|row| row[:id]}
    KEY_TO_TYPE.each do |key, type|
      Array(json[key]).each do |attribute|
        next unless valid_attribute_ids.include?(attribute['definition_id'])

        if attribute['value']
          db[:assessment_attribute].insert(:assessment_id => obj.id,
                                           :value => attribute['value'],
                                           :assessment_attribute_definition_id => attribute['definition_id'])
        end

        if attribute['note']
          db[:assessment_attribute_note].insert(:assessment_id => obj.id,
                                                :note => attribute['note'],
                                                :assessment_attribute_definition_id => attribute['definition_id'])
        end
      end
    end

    # Calculate the derived "Research Value" rating (the sum of Interest and Documentation Quality)
    research_value_id = db[:assessment_attribute_definition].filter(:label => 'Research Value').get(:id)
    values = db[:assessment_attribute]
      .join(:assessment_attribute_definition, :id => :assessment_attribute__assessment_attribute_definition_id)
      .filter(:assessment_attribute_definition__label => ['Interest', 'Documentation Quality'],
              :assessment_attribute__assessment_id => obj.id)
      .select(:assessment_attribute__value)
      .map {|row| row[:value] ? (Integer(row[:value]) rescue nil) : nil}

    research_value = values.compact.reduce {|sum, n| sum + n}

    if research_value
      db[:assessment_attribute].insert(:assessment_id => obj.id,
                                       :value => research_value.to_s,
                                       :assessment_attribute_definition_id => research_value_id)
    end
  end
end

.clone_from_json(json, opts = {}) ⇒ Object

Like create_from_json but runs in the context where we have json taken from repo A and we want to create an equivalent record in the current repository.

This happens in the context of repository transfers where some (but not all) of the records linked to an assessment are being moved to a different repository. The situation is similar to transfer_to_repository (see above), but instead of transferring the assessment we’ll create a new version in the target repository.



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# File 'backend/app/model/assessment.rb', line 107

def self.clone_from_json(json, opts = {})
  repo_attribute_links = []

  repo_attribute_links += extract_transfer_repo_attributes(json.ratings, 'rating')
  repo_attribute_links += extract_transfer_repo_attributes(json.formats, 'format')
  repo_attribute_links += extract_transfer_repo_attributes(json.conservation_issues, 'conservation_issue')

  # Create as normal, which will drop any attributes that belonged to the old repository
  cloned_assessment = create_from_json(json, opts)

  # Finally, create as many of them as we can by matching against attributes
  # in the new repository.
  apply_matching_repo_attributes_for_transferred_assessment(cloned_assessment, repo_attribute_links)

  cloned_assessment
end

.create_from_json(json, opts = {}) ⇒ Object 



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# File 'backend/app/model/assessment.rb', line 30

def self.create_from_json(json, opts = {})
  prepare_monetary_value_for_save(json, opts)
  obj = super
  apply_attributes(obj, json)
  obj
end

.sequel_to_jsonmodel(objs, opts = {}) ⇒ Object 



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# File 'backend/app/model/assessment.rb', line 171

def self.sequel_to_jsonmodel(objs, opts = {})
  jsons = super

  prepare_monetary_value_for_jsonmodel(objs, jsons)

  jsons.zip(objs).each do |json, obj|
    json['display_string'] = obj.id.to_s
    json['collections'] = obj.linked_collection_uris.map {|uri| {
      'ref' => uri
    }}
  end

  definitions_by_obj = {}

  # each assessment has some attributes that link to a definition
  DB.open do |db|
    db[:assessment_attribute_definition]
      .filter(:repo_id => [Repository.global_repo_id, active_repository])
      .each do |definition|
      jsons.zip(objs).each do |json, obj|
        KEY_TO_TYPE.each do |key, type|
          json[key] ||= []
        end

        key = json_key_for_type(definition[:type])
        definition_json = {
          'global' => definition[:repo_id] == Repository.global_repo_id,
          'label' => definition[:label],
          'value' => nil,
          'note' => nil,
          'readonly' => (definition[:readonly] == 1),
          'definition_id' => definition[:id],
        }

        definitions_by_obj[obj.id] ||= {}
        definitions_by_obj[obj.id][definition[:id]] = definition_json

        json[key] << definition_json
      end
    end

    # Load our attribute values
    db[:assessment_attribute]
      .filter(:assessment_id => objs.map(&:id))
      .each do |attribute|

      assessment_id = attribute[:assessment_id]
      definition_id = attribute[:assessment_attribute_definition_id]

      definition_json = definitions_by_obj.fetch(assessment_id).fetch(definition_id)

      definition_json['value'] = attribute[:value]
    end

    # Load our attribute notes
    db[:assessment_attribute_note]
      .filter(:assessment_id => objs.map(&:id))
      .each do |attribute|

      assessment_id = attribute[:assessment_id]
      definition_id = attribute[:assessment_attribute_definition_id]

      definition_json = definitions_by_obj.fetch(assessment_id).fetch(definition_id)

      definition_json['note'] = attribute[:note]
    end

    jsons
  end
end

Instance Method Details

#linked_collection_uris ⇒ Object 



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# File 'backend/app/model/assessment.rb', line 243

def linked_collection_uris
  uris = self.class.find_relationship(:assessment).who_participates_with(self).map do |record|
    if record.is_a? Resource
      JSONModel(:resource).uri_for(record.id, :repo_id => record.repo_id)
    elsif record.is_a? ArchivalObject
      JSONModel(:resource).uri_for(record.root_record_id, :repo_id => record.repo_id)
    end
  end

  uris.compact.uniq
end

#transfer_to_repository(repository, transfer_group = []) ⇒ Object 



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# File 'backend/app/model/assessment.rb', line 50

def transfer_to_repository(repository, transfer_group = [])
  # When we transfer an assessment to another repository, it might contain
  # references to attribute definitions that belong to its originating
  # repository.
  #
  # Rather than outright breaking those links, we attempt to find a
  # corresponding attribute in the target repository (based on attribute
  # label).  So the assumption here is that two attributes with the same label
  # are equivalent.
  DB.open do |db|
    repo_attribute_links = db[:assessment_attribute_definition]
                             .left_join(:assessment_attribute, :assessment_attribute_definition_id => :assessment_attribute_definition__id)
                             .left_join(:assessment_attribute_note, :assessment_attribute_definition_id => :assessment_attribute_definition__id)
                             .filter(:assessment_attribute_definition__repo_id => self.class.active_repository)
                             .where(Sequel.|({:assessment_attribute__assessment_id => self.id},
                                             {:assessment_attribute_note__assessment_id => self.id}))
                             .select(:assessment_attribute_definition__id,
                                     :assessment_attribute_definition__label,
                                     :assessment_attribute_definition__type,
                                     :assessment_attribute__value,
                                     :assessment_attribute_note__note)
                             .map {|row| TransferRepoAttribute.new(row[:id], row[:label], row[:type], row[:value], row[:note])}

    # Do the transfer
    super

    # Make sure we observe the updated repo_id
    self.refresh

    unless repo_attribute_links.empty?
      # Unlink the repository-scoped attributes and notes that are no longer valid
      db[:assessment_attribute]
        .filter(:assessment_id => self.id,
                :assessment_attribute_definition_id => repo_attribute_links.map(&:definition_id))
        .delete

      db[:assessment_attribute_note]
        .filter(:assessment_id => self.id,
                :assessment_attribute_definition_id => repo_attribute_links.map(&:definition_id))
        .delete

      # Search for replacements based on label and link them up
      self.class.apply_matching_repo_attributes_for_transferred_assessment(self, repo_attribute_links)
    end
  end
end

#update_from_json(json, opts = {}, apply_nested_records = true) ⇒ Object 



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# File 'backend/app/model/assessment.rb', line 38

def update_from_json(json, opts = {}, apply_nested_records = true)
  self.class.prepare_monetary_value_for_save(json, opts)
  super
  self.class.apply_attributes(self, json)
  self
end