Forum: Ruby on Rails override a default attribute don't behave like expected in form_for

Announcement (2017-05-07): is now read-only since I unfortunately do not have the time to support and maintain the forum any more. Please see and for other Rails- und Ruby-related community platforms.
Daniel L. (Guest)
on 2008-12-18 03:23
(Received via mailing list)
Hello, I have a strange behavior and don't know why.

If I override attributes from AcitveRecord object like below:

  def end_date=(date)
    date = date.to_date unless date.blank?

  def end_date
    date = read_attribute(:end_date)
    I18n.localize(date) if date.present?

Everything will work fine but when I try call text_field in a form_for
block I get the database value and ignore end_date getter.

<%= f.text_field :end_date, :class=>"date", :size=>"10" %>

The text_field will be filled with 2008-12-10 (mysql date) instead of
10/12/2008 ( I18n localized)

Anyone know why we get this behavior?
Daniel L. (Guest)
on 2008-12-18 03:31
(Received via mailing list)
Looking inside rails code I found text_field use InstanceTag and this
call []before_type_cast and will return my value before turned in ruby
What is the benefit os this behavior?

I can solve my problem forcing value on text_field but I think it is
Daniel L. (Guest)
on 2008-12-18 03:50
(Received via mailing list)
I fix my problem with alias between attribute and
attribute_before_type_cast ... I think active record do this because
other kind of columns like decimals or numbers ( i'm not sure ) but
it's not beautyfull when we need make alias only for make text_field
behave like expected.
This topic is locked and can not be replied to.