Module: GeneralUnits::ActiveRecordExtension::ClassMethods

Defined in:
lib/general_units/models/active_record_extension.rb

Instance Method Summary collapse

Instance Method Details

#has_box(*args) ⇒ Object 



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# File 'lib/general_units/models/active_record_extension.rb', line 128

def has_box(*args)
  options = args.extract_options!
  prefix = args.first||:box
  
  class_attribute :_has_box unless defined?(_has_box)
  self._has_box = {prefix => {}}
  
  self._has_box[prefix][:length_field] = length_field = options[:length]||:"#{prefix}_length"
  self._has_box[prefix][:width_field] = width_field = options[:width]||:"#{prefix}_width"
  self._has_box[prefix][:height_field] = height_field = options[:height]||:"#{prefix}_height"
  
  self._has_box[prefix][:unit_field] = unit_field = options[:unit]||:"#{prefix}_unit"
  self._has_box[prefix][:default_unit] = default_unit = options[:default_unit]||:centimeter
  self._has_box[prefix][:default_unit_method] = default_unit_method = options[:default_unit_method]||:"deafult_#{prefix}_unit"
  
  validates_inclusion_of unit_field, :in => Length.units.map {|u| u.code.to_s}, :if => Proc.new {|o| o.send(length_field).present? || o.send(width_field).present? || o.send(height_field).present?}
  
  class_eval "  \n    def \#{unit_field}=(value)\n      if value.to_sym.in?(GeneralUnits::Length.units.map(&:code))\n        super(value.to_s) \n      else\n        raise ArgumentError, \"Unprocessable unit: \\\#{value.inspect\\}\"\n      end\n    end\n    \n    def \#{prefix}\n      begin\n        if @_\#{prefix}.nil? || \#{length_field}_changed? || \#{width_field}_changed? || \#{height_field}_changed? || \#{unit_field}_changed?\n          @_\#{prefix} = GeneralUnits::Box.new(\#{length_field}, \#{width_field}, \#{height_field}, \#{unit_field})\n        else\n          @_\#{prefix}\n        end\n      rescue ArgumentError, TypeError\n        nil\n      end\n    end\n    \n    def \#{prefix}=(value)\n      case value\n      when GeneralUnits::Box then\n        self.\#{length_field} = value.length\n        self.\#{width_field} = value.width\n        self.\#{height_field} = value.height\n        self.\#{unit_field} = value.unit.code\n      when Array then\n        self.\#{length_field} = value[0]\n        self.\#{width_field} = value[1]\n        self.\#{height_field} = value[2]\n        self.\#{unit_field} = value[3]||try(:\#{default_unit_method})||:\#{default_unit}\n      when Hash then\n        value = value.with_indifferent_access\n        self.\#{length_field} = value[:length]\n        self.\#{width_field} = value[:width]\n        self.\#{height_field} = value[:height]\n        self.\#{unit_field} = value[:unit]||try(:\#{default_unit_method})||:\#{default_unit}\n      when Numeric then\n        self.\#{length_field} = value\n        self.\#{width_field} = value\n        self.\#{height_field} = value\n        self.\#{unit_field} = try(:\#{default_unit_method})||:\#{default_unit}\n      when nil then\n        self.\#{length_field} = nil\n        self.\#{width_field} = nil\n        self.\#{height_field} = nil\n        self.\#{unit_field} = nil\n      end\n      \#{prefix}\n    end\n  EOV\nend\n"

#has_length(*args) ⇒ Object 



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# File 'lib/general_units/models/active_record_extension.rb', line 68

def has_length(*args)
  options = args.extract_options!
  prefix = args.first||:length
  
  class_attribute :_has_length unless defined?(_has_length)
  self._has_length = {prefix => {}}
  
  self._has_length[prefix][:amount_field] = amount_field = options[:amount]||:"#{prefix}_amount"
  self._has_length[prefix][:unit_field] = unit_field = options[:unit]||:"#{prefix}_unit"
  self._has_length[prefix][:default_unit] = default_unit = options[:default_unit]||:centimeter
  self._has_length[prefix][:default_unit_method] = default_unit_method = options[:default_unit_method]||:"deafult_#{prefix}_unit"
  
  validates_inclusion_of unit_field, :in => Length.units.map {|u| u.code.to_s}, :if => Proc.new {|o| o.send(amount_field).present?}
  
  class_eval "  \n    def \#{unit_field}=(value)\n      if value.to_sym.in?(GeneralUnits::Length.units.map(&:code))\n        super(value.to_s) \n      else\n        raise ArgumentError, \"Unprocessable unit: \\\#{value.inspect\\}\"\n      end\n    end\n  \n    def \#{prefix}\n      begin\n        if @_\#{prefix}.nil? || \#{amount_field}_changed? || \#{unit_field}_changed?\n          @_\#{prefix} = GeneralUnits::Length.new(\#{amount_field}, \#{unit_field})\n        else\n          @_\#{prefix}\n        end\n      rescue ArgumentError, TypeError\n        nil\n      end\n    end\n    \n    def \#{prefix}=(value)\n      case value\n      when GeneralUnits::Length\n        self.\#{amount_field} = value.amount\n        self.\#{unit_field} = value.unit.code\n      when Array then\n        self.\#{amount_field} = value[0]\n        self.\#{unit_field} = value[1]||try(:\#{default_unit_method})||:\#{default_unit}\n      when Hash then\n        value = value.with_indifferent_access\n        self.\#{amount_field} = value[:amount]\n        self.\#{unit_field} = value[:unit]||try(:\#{default_unit_method})||:\#{default_unit}\n      when Numeric then\n        self.\#{amount_field} = value\n        self.\#{unit_field} = try(:\#{default_unit_method})||:\#{default_unit}\n      when nil then\n        self.\#{amount_field} = nil\n        self.\#{unit_field} = nil\n      end\n      \#{prefix}\n    end\n  EOV\nend\n"

#has_weight(*args) ⇒ Object 



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# File 'lib/general_units/models/active_record_extension.rb', line 8

def has_weight(*args)
  options = args.extract_options!
  prefix = args.first||:weight
  
  class_attribute :_has_weight unless defined?(_has_weight)
  self._has_weight = {prefix => {}}
  
  self._has_weight[prefix][:amount_field] = amount_field = options[:amount]||:"#{prefix}_amount"
  self._has_weight[prefix][:unit_field] = unit_field = options[:unit]||:"#{prefix}_unit"
  self._has_weight[prefix][:default_unit] = default_unit = options[:default_unit]||:kilogram
  self._has_weight[prefix][:default_unit_method] = default_unit_method = options[:default_unit_method]||:"deafult_#{prefix}_unit"
  
  validates_inclusion_of unit_field, :in => Weight.units.map {|u| u.code.to_s}, :if => Proc.new {|o| o.send(amount_field).present?}
  
  class_eval "  \n    def \#{unit_field}=(value)\n      if value.to_sym.in?(GeneralUnits::Weight.units.map(&:code))\n        super(value.to_s) \n      else\n        raise ArgumentError, \"Unprocessable unit: \\\#{value.inspect\\}\"\n      end\n    end\n  \n    def \#{prefix}\n      begin\n        if @_\#{prefix}.nil? || \#{amount_field}_changed? || \#{unit_field}_changed?\n          @_\#{prefix} = GeneralUnits::Weight.new(\#{amount_field}, \#{unit_field})\n        else\n          @_\#{prefix}\n        end\n      rescue ArgumentError, TypeError\n        nil\n      end\n    end\n    \n    def \#{prefix}=(value)\n      case value\n      when GeneralUnits::Weight\n        self.\#{amount_field} = value.amount\n        self.\#{unit_field} = value.unit.code\n      when Array then\n        self.\#{amount_field} = value[0]\n        self.\#{unit_field} = value[1]||try(:\#{default_unit_method})||:\#{default_unit}\n      when Hash then\n        value = value.with_indifferent_access\n        self.\#{amount_field} = value[:amount]\n        self.\#{unit_field} = value[:unit]||try(:\#{default_unit_method})||:\#{default_unit}\n      when Numeric then\n        self.\#{amount_field} = value\n        self.\#{unit_field} = try(:\#{default_unit_method})||:\#{default_unit}\n      when nil then\n        self.\#{amount_field} = nil\n        self.\#{unit_field} = nil\n      end\n      \#{prefix}\n    end\n  EOV\nend\n"