diff options
Diffstat (limited to 'activerecord/lib/active_record/type/numeric.rb')
-rw-r--r-- | activerecord/lib/active_record/type/numeric.rb | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/type/numeric.rb b/activerecord/lib/active_record/type/numeric.rb new file mode 100644 index 0000000000..674f996f38 --- /dev/null +++ b/activerecord/lib/active_record/type/numeric.rb @@ -0,0 +1,36 @@ +module ActiveRecord + module Type + module Numeric # :nodoc: + def number? + true + end + + def type_cast(value) + value = case value + when true then 1 + when false then 0 + when ::String then value.presence + else value + end + super(value) + end + + def changed?(old_value, _new_value, new_value_before_type_cast) # :nodoc: + super || number_to_non_number?(old_value, new_value_before_type_cast) + end + + private + + def number_to_non_number?(old_value, new_value_before_type_cast) + old_value != nil && non_numeric_string?(new_value_before_type_cast) + end + + def non_numeric_string?(value) + # 'wibble'.to_i will give zero, we want to make sure + # that we aren't marking int zero to string zero as + # changed. + value.to_s !~ /\A-?\d+\.?\d*\z/ + end + end + end +end |