Class: ActiveFedora::Associations::HasManyAssociation

Inherits:
CollectionAssociation show all
Defined in:
lib/active_fedora/associations/has_many_association.rb

Overview

:nodoc:

Instance Attribute Summary

Attributes inherited from CollectionAssociation

#proxy

Attributes inherited from Association

#inversed, #owner, #reflection, #target

Instance Method Summary collapse

Methods inherited from CollectionAssociation

#add_to_target, #any?, #build, #concat, #concat_records, #count, #create, #create!, #delete, #delete_all, #destroy, #destroy_all, #empty?, #find, #first, #ids_reader, #ids_writer, #include?, #last, #load_from_solr, #load_target, #null_scope?, #reader, #replace, #reset, #scope, #select, #size, #target=, #to_ary, #writer

Methods inherited from Association

#association_scope, #initialize_attributes, #load_target, #loaded!, #loaded?, #reload, #reset, #reset_scope, #scope, #set_inverse_instance, #stale_target?, #target_scope

Constructor Details

#initialize(owner, reflection) ⇒ HasManyAssociation

Returns a new instance of HasManyAssociation.

[View source]

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# File 'lib/active_fedora/associations/has_many_association.rb', line 4

def initialize(owner, reflection)
  super
end

Instance Method Details

#count_records ⇒ Object

Returns the number of records in this collection.

That does not depend on whether the collection has already been loaded or not. The size method is the one that takes the loaded flag into account and delegates to count_records if needed.

If the collection is empty the target is set to an empty array and the loaded flag is set to true as well.

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# File 'lib/active_fedora/associations/has_many_association.rb', line 16

def count_records
  count = scope.count

  # If there's nothing in the database and @target has no new records
  # we are certain the current target is an empty array. This is a
  # documented side-effect of the method that may avoid an extra SELECT.
  @target ||= [] and loaded! if count.zero?

  count
end

#handle_dependency ⇒ Object

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# File 'lib/active_fedora/associations/has_many_association.rb', line 60

def handle_dependency
  case options[:dependent]
  when :restrict_with_exception
    raise ActiveFedora::DeleteRestrictionError, reflection.name unless empty?

  when :restrict_with_error
    unless empty?
      record = owner.class.human_attribute_name(reflection.name).downcase
      owner.errors.add(:base, message || :'restrict_dependent_destroy.has_many', record: record)
      throw(:abort)
    end

  else
    if options[:dependent] == :destroy
      # No point in executing the counter update since we're going to destroy the parent anyway
      load_target.each { |t| t.destroyed_by_association = reflection }
      destroy_all
    else
      delete_all
    end
  end
end

#insert_record(record, validate = true, raise = false) ⇒ Object

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# File 'lib/active_fedora/associations/has_many_association.rb', line 49

def insert_record(record, validate = true, raise = false)
  set_owner_attributes(record)
  set_inverse_instance(record)

  if raise
    record.save!(validate: validate)
  else
    record.save(validate: validate)
  end
end

#set_owner_attributes(record) ⇒ Object

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# File 'lib/active_fedora/associations/has_many_association.rb', line 27

def set_owner_attributes(record)
  if klass == ActiveFedora::Base
    inverse = find_polymorphic_inverse(record)
    if inverse.belongs_to?
      record[inverse.foreign_key] = owner.id
    else # HABTM
      record[inverse.foreign_key] ||= []
      record[inverse.foreign_key] += [owner.id]
    end
  elsif owner.persisted?
    inverse = reflection.inverse_of
    if inverse && inverse.collection?
      record[inverse.foreign_key] ||= []
      record[inverse.foreign_key] += [owner.id]
    elsif inverse && inverse.klass == ActiveFedora::Base
      record[inverse.foreign_key] = owner.id
    else
      record[reflection.foreign_key] = owner.id
    end
  end
end