Class: DataMapper::Property::Numeric

Inherits:
Object show all
Includes:
PassThroughLoadDump, Typecast::Numeric
Defined in:
lib/dm-core/property/numeric.rb

Direct Known Subclasses

Decimal, Float, Integer

Constant Summary collapse

DEFAULT_PRECISION = 
10
DEFAULT_NUMERIC_MIN = 
0
DEFAULT_NUMERIC_MAX = 
2**31-1

Constants inherited from DataMapper::Property

INVALID_NAMES, OPTIONS, PRIMITIVES, VISIBILITY_OPTIONS

Instance Attribute Summary collapse

Attributes inherited from DataMapper::Property

#allow_blank, #allow_nil, #default, #index, #instance_variable_name, #model, #name, #options, #primitive, #reader_visibility, #repository_name, #required, #unique_index, #writer_visibility

Instance Method Summary collapse

Methods included from Typecast::Numeric

#typecast_to_numeric

Methods included from PassThroughLoadDump

#dump, #load

Methods inherited from Object

#dump, #load, #to_child_key

Methods inherited from DataMapper::Property

accept_options, accepted_options, #allow_blank?, #allow_nil?, #assert_valid_options, #bind, demodulized_names, descendants, determine_class, #determine_visibility, #field, find_class, #get, #get!, inherited, #inspect, #key?, #lazy?, #lazy_load, #lazy_load_properties, #loaded?, nullable, options, #primitive?, #properties, #required?, #serial?, #set, #set!, #typecast, #unique?, #valid?

Methods included from Chainable

#chainable, #extendable

Methods included from Equalizer

#equalize

Methods included from Deprecate

#deprecate

Methods included from Subject

#default?, #default_for

Methods included from Assertions

#assert_kind_of

Constructor Details

#initialize(model, name, options = {}) ⇒ Numeric (protected)

Returns a new instance of Numeric.



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# File 'lib/dm-core/property/numeric.rb', line 18

def initialize(model, name, options = {})
  super

  if @primitive == BigDecimal || @primitive == ::Float
    @precision = @options.fetch(:precision, DEFAULT_PRECISION)
    @scale     = @options.fetch(:scale,     self.class::DEFAULT_SCALE)

    unless @precision > 0
      raise ArgumentError, "precision must be greater than 0, but was #{@precision.inspect}"
    end
  end

  if @options.key?(:min) || @options.key?(:max)
    @min = @options.fetch(:min, DEFAULT_NUMERIC_MIN)
    @max = @options.fetch(:max, DEFAULT_NUMERIC_MAX)

    if @max < DEFAULT_NUMERIC_MIN && !@options.key?(:min)
      raise ArgumentError, "min should be specified when the max is less than #{DEFAULT_NUMERIC_MIN}"
    elsif @max < @min
      raise ArgumentError, "max must be less than the min, but was #{@max} while the min was #{@min}"
    end
  end
end

Instance Attribute Details

#max ⇒ Object (readonly)

Returns the value of attribute max.



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# File 'lib/dm-core/property/numeric.rb', line 10

def max
  @max
end

#min ⇒ Object (readonly)

Returns the value of attribute min.



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# File 'lib/dm-core/property/numeric.rb', line 10

def min
  @min
end

#precision ⇒ Object (readonly)

Returns the value of attribute precision.



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# File 'lib/dm-core/property/numeric.rb', line 10

def precision
  @precision
end

#scale ⇒ Object (readonly)

Returns the value of attribute scale.



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# File 'lib/dm-core/property/numeric.rb', line 10

def scale
  @scale
end