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-rw-r--r--activemodel/lib/active_model/type/decimal.rb50
1 files changed, 50 insertions, 0 deletions
diff --git a/activemodel/lib/active_model/type/decimal.rb b/activemodel/lib/active_model/type/decimal.rb
new file mode 100644
index 0000000000..83a16018ea
--- /dev/null
+++ b/activemodel/lib/active_model/type/decimal.rb
@@ -0,0 +1,50 @@
+module ActiveModel
+ module Type
+ class Decimal < Value # :nodoc:
+ include Helpers::Numeric
+
+ 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.to_i)
+ else
+ if value.respond_to?(:to_d)
+ value.to_d
+ else
+ cast_value(value.to_s)
+ end
+ end
+
+ scale ? casted_value.round(scale) : casted_value
+ end
+
+ def convert_float_to_big_decimal(value)
+ if precision
+ BigDecimal(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
+ end
+ end
+end