Class: DataMapper::Associations::RelationshipChain

Constants

OPTIONS
[ :repository_name, :near_relationship_name, :remote_relationship_name, :child_model_name, :parent_model_name, :parent_key, :child_key, :min, :max ]

Constructor Summary

private initialize(options)
[View source] 


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# File 'dm-core/lib/dm-core/associations/relationship_chain.rb', line 58

def initialize(options)
  if (missing_options = options.keys - OPTIONS).any?




    raise ArgumentError, "The options #{missing_options * ', '} are required"
  end

  @repository_name          = options.fetch(:repository_name)
  @near_relationship_name   = options.fetch(:near_relationship_name)
  @remote_relationship_name = options.fetch(:remote_relationship_name)
  @child_model_name         = options.fetch(:child_model_name)
  @parent_model_name        = options.fetch(:parent_model_name)
  @parent_properties        = options.fetch(:parent_key)
  @child_properties         = options.fetch(:child_key)

  @name        = near_relationship.name
  @query       = options.reject{ |key,val| OPTIONS.include?(key) }
  @extra_links = []
  @options     = options
end

Public Visibility

Public Instance Method Summary

#child_model
#get_children(parent, options = {}, finder = :all)

Public Instance Methods Inherited from Object

validatable?

Public Instance Method Details

child_model

public child_model
[View source] 


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# File 'dm-core/lib/dm-core/associations/relationship_chain.rb', line 23

def child_model



  near_relationship.child_model
end

get_children

public get_children(parent, options = {}, finder = :all)
[View source] 


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# File 'dm-core/lib/dm-core/associations/relationship_chain.rb', line 13

def get_children(parent, options = {}, finder = :all)
  query = @query.merge(options).merge(child_key.to_query(parent_key.get(parent)))

  query[:links] = links

  DataMapper.repository(parent.repository.name) do
    finder == :first ? grandchild_model.first(query) : grandchild_model.all(query).uniq
  end
end