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由 Daniel Fox 提交于
This bug occurs when an attribute of an ActiveRecord model is an ActiveRecord::Type::Integer type or a ActiveRecord::Type::Decimal type (or any other type that includes the ActiveRecord::Type::Numeric module. When the value of the attribute is negative and is set to the same negative value, it is marked as changed. Take the following example of a Person model with the integer attribute age: class Person < ActiveRecord::Base # age :integer(4) end The following will produce the error: person = Person.new(age: -1) person.age = -1 person.changes => { "age" => [-1, -1] } person.age_changed? => true The problematic line is here: module ActiveRecord module Type module Numeric ... 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 The regex match doesn't accept numbers with a leading '-'.
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