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require "bigdecimal/util"
module ActiveModel
module Type
class Decimal < Value # :nodoc:
include Helpers::Numeric
BIGDECIMAL_PRECISION = 18
def type
:decimal
end
def type_cast_for_schema(value)
value.to_s.inspect
end
private
def cast_value(value)
casted_value = \
case value
when ::Float
convert_float_to_big_decimal(value)
when ::Numeric, ::String
BigDecimal(value, precision || BIGDECIMAL_PRECISION)
else
if value.respond_to?(:to_d)
value.to_d
else
cast_value(value.to_s)
end
end
apply_scale(casted_value)
end
def convert_float_to_big_decimal(value)
if precision
BigDecimal(apply_scale(value), float_precision)
else
value.to_d
end
end
def float_precision
if precision.to_i > ::Float::DIG + 1
::Float::DIG + 1
else
precision.to_i
end
end
def apply_scale(value)
if scale
value.round(scale)
else
value
end
end
end
end
end
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