diff options
Diffstat (limited to 'activerecord/lib/active_record/type/integer.rb')
-rw-r--r-- | activerecord/lib/active_record/type/integer.rb | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/type/integer.rb b/activerecord/lib/active_record/type/integer.rb index 08477d1303..d69e5b3f28 100644 --- a/activerecord/lib/active_record/type/integer.rb +++ b/activerecord/lib/active_record/type/integer.rb @@ -3,21 +3,44 @@ module ActiveRecord class Integer < Value # :nodoc: include Numeric + def initialize(*) + super + @range = -max_value...max_value + end + def type :integer end alias type_cast_for_database type_cast + protected + + attr_reader :range + private def cast_value(value) case value when true then 1 when false then 0 - else value.to_i rescue nil + else + result = value.to_i rescue nil + ensure_in_range(result) if result + result end end + + def ensure_in_range(value) + unless range.cover?(value) + raise RangeError, "#{value} is too large for #{self.class} with limit #{limit || 4}" + end + end + + def max_value + limit = self.limit || 4 + 1 << (limit * 8 - 1) # 8 bits per byte with one bit for sign + end end end end |