Module: DataMapper::Associations::OneToMany

Extended by:
DataMapper::Assertions
Defined in:
lib/gems/dm-core-0.9.9/lib/dm-core/associations/one_to_many.rb

Defined Under Namespace

Classes: Proxy

Class Method Summary collapse

Methods included from DataMapper::Assertions

assert_kind_of

Class Method Details

.setup(name, model, options = {}) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Setup one to many relationship between two models -



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# File 'lib/gems/dm-core-0.9.9/lib/dm-core/associations/one_to_many.rb', line 9

def self.setup(name, model, options = {})
  assert_kind_of 'name',    name,    Symbol
  assert_kind_of 'model',   model,   Model
  assert_kind_of 'options', options, Hash

  repository_name = model.repository.name

  model.class_eval "    def \#{name}(query = {})\n      \#{name}_association.all(query)\n    end\n\n    def \#{name}=(children)\n      \#{name}_association.replace(children)\n    end\n\n    private\n\n    def \#{name}_association\n      @\#{name}_association ||= begin\n        unless relationship = model.relationships(\#{repository_name.inspect})[\#{name.inspect}]\n          raise ArgumentError, \"Relationship \#{name.inspect} does not exist in \\\#{model}\"\n        end\n        association = Proxy.new(relationship, self)\n        parent_associations << association\n        association\n      end\n    end\n  EOS\n\n  model.relationships(repository_name)[name] = if options.has_key?(:through)\n    opts = options.dup\n\n    if opts.key?(:class_name) && !opts.key?(:child_key)\n      warn(<<-EOS.margin)\n        You have specified \#{model.base_model.name}.has(\#{name.inspect}) with :class_name => \#{opts[:class_name].inspect}. You probably also want to specify the :child_key option.\n      EOS\n    end\n\n    opts[:child_model]            ||= opts.delete(:class_name)  || Extlib::Inflection.classify(name)\n    opts[:parent_model]             =   model\n    opts[:repository_name]          =   repository_name\n    opts[:near_relationship_name]   =   opts.delete(:through)\n    opts[:remote_relationship_name] ||= opts.delete(:remote_name) || name\n    opts[:parent_key]               =   opts[:parent_key]\n    opts[:child_key]                =   opts[:child_key]\n\n    RelationshipChain.new( opts )\n  else\n    Relationship.new(\n      name,\n      repository_name,\n      options.fetch(:class_name, Extlib::Inflection.classify(name)),\n      model,\n      options\n    )\n  end\nend\n", __FILE__, __LINE__