Class: IDLookup

Inherits:
Object
  • Object
show all
Defined in:
backend/app/model/idlookup.rb

Instance Method Summary collapse

Instance Method Details

#find_by_ids(model, params) ⇒ Object 



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# File 'backend/app/model/idlookup.rb', line 3

def find_by_ids(model, params)
  filters = {}

  params.each do |key, values|
    next if Array(values).empty?

    key = key.intern

    # We're not searching on these values
    next if [:repo_id, :resolve].include?(key)

    # The identifier for a resource needs to be massaged to match the db
    if key == :identifier
      identifiers = Array(values).map {|identifier|
        parsed = ASUtils.json_parse(identifier)
        if parsed.is_a?(Array) && parsed.length > 0 && parsed.length <= 4
          padded = (parsed + ([nil] * 3)).take(4)
          ASUtils.to_json(padded)
        end
      }.compact
      filters[key] = Array(identifiers)
    elsif key == :ark
      # ARKs will be contained in ark_name.ark_value and will link back to a record by
      # foreign key.  Find those and build a filter that pulls back the linked records
      # by their primary key.
      fk_col = :"#{model.table_name}_id"
      filters[:id] = ArkName.filter(:ark_value => values).map(fk_col)
    else
      filters[key] = Array(values)
    end
  end

  return [] if filters.empty?

  model.this_repo.where(filters).select(:id).map {|record|
    {'ref' => record.uri}
  }
end