From 281edce6db8accc7d4a0e9ab01892631d9d0ebc3 Mon Sep 17 00:00:00 2001 From: Pratik Naik Date: Tue, 20 May 2008 20:50:46 +0100 Subject: Ensure nil to '' doesn't get recorded by dirty for nullable integer columns. [#150 state:resolved] [Jason Dew, Pratik] --- activerecord/lib/active_record/dirty.rb | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) (limited to 'activerecord/lib/active_record') diff --git a/activerecord/lib/active_record/dirty.rb b/activerecord/lib/active_record/dirty.rb index 6034963811..49f1204fa1 100644 --- a/activerecord/lib/active_record/dirty.rb +++ b/activerecord/lib/active_record/dirty.rb @@ -117,14 +117,7 @@ module ActiveRecord # The attribute already has an unsaved change. unless changed_attributes.include?(attr) old = clone_attribute_value(:read_attribute, attr) - - # Remember the original value if it's different. - typecasted = if column = column_for_attribute(attr) - column.type_cast(value) - else - value - end - changed_attributes[attr] = old unless old == typecasted + changed_attributes[attr] = old if field_changed?(attr, old, value) end # Carry on. @@ -138,5 +131,20 @@ module ActiveRecord update_without_dirty end end + + def field_changed?(attr, old, value) + if column = column_for_attribute(attr) + if column.type == :integer && column.null && old.nil? + # For nullable integer columns, NULL gets stored in database for blank (i.e. '') values. + # Hence we don't record it as a change if the value changes from nil to ''. + value = nil if value.blank? + else + value = column.type_cast(value) + end + end + + old != value + end + end end -- cgit v1.2.3