Module: DataMapper::Is::Temporal

Included in:
Model
Defined in:
lib/dm-is-temporal/is/temporal.rb

Defined Under Namespace

Modules: Migration Classes: PropertyHelper, TemporalListProxy, TemporalProxy

Constant Summary collapse

@@__temporal_classes__ = 
[]

Instance Method Summary collapse

Instance Method Details

#is_temporal(*args, &block) ⇒ Object 



58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
 
# File 'lib/dm-is-temporal/is/temporal.rb', line 58

def is_temporal(*args, &block)

  extend(Migration) if respond_to?(:auto_migrate!)

  version_model = DataMapper::Model.new do
    def has(*args)
      #ignore all
    end
  end

  if block_given?
    version_model.instance_eval <<-RUBY
      def self.default_repository_name
        :#{default_repository_name}
      end
    RUBY

    version_model.property(:id, DataMapper::Property::Serial)
    version_model.property(:updated_at, DataMapper::Property::DateTime)
    version_model.before(:save) { self.updated_at ||= DateTime.now }
    version_model.instance_eval(&block)

    const_set(:TemporalVersion, version_model)
    @@__temporal_classes__ << self::TemporalVersion

    h = PropertyHelper.new(self)
    h.instance_eval(&block)

    has n, :temporal_versions #, :accessor => :protected

    create_methods

    h.__properties__.each do |a|
      create_temporal_reader(a[0])
      create_temporal_writer(a[0])
    end


    h.__has__.each do |a|
      has_args = a[2]
      plural_name = a[1]

      if has_args.any? and has_args[0].is_a?(String)
        clazz = has_args[0]
        table = DataMapper::Inflector.tableize(clazz)
        singular_name = DataMapper::Inflector.singularize(table)
      else
        singular_name = DataMapper::Inflector.singularize(plural_name.to_s)
      end


      list_model = DataMapper::Model.new

      list_model.instance_eval <<-RUBY
        def self.default_repository_name
          :#{default_repository_name}
        end
      RUBY

      list_model.property(:id, DataMapper::Property::Serial)
      list_model.property(:updated_at, DataMapper::Property::DateTime)
      list_model.property(:deleted_at, DataMapper::Property::DateTime)
      list_model.before(:save) { self.updated_at ||= DateTime.now }
      list_model.belongs_to singular_name #, :accessor => :protected

      temporal_list_name = "temporal_#{plural_name}".to_sym

      list_model_name = Inflector.classify("temporal_#{singular_name}")

      const_set(list_model_name.to_sym, list_model)
      @@__temporal_classes__ << eval("self::#{list_model_name}")

      has n, temporal_list_name, list_model_name

      create_temporal_list_reader(plural_name, singular_name, temporal_list_name, list_model_name)
#            create_temporal_list_writer(a[1], temporal_list)
    end
  else
    raise "Temporal Property pattern not supported yet"
  end

end