Hi everyone!
I''m a little bit new to Rails development and I am looking for a
solution
for this issue.
Let''s say that I have a model called Person and the person has an
attribute
name. But I want to put a surname with this name. Something like this:
class Unit < ActiveRecord::Base
def name= name
@name = name + ''bla bla''
end
end
In Ruby I could do this, but this doesn''t affect my object at all...
How can I do that?
Thanks in advance
--
Marco Antonio
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On Apr 8, 9:54 am, Marco Antonio Filho <marcoafi...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> class Unit < ActiveRecord::Base > > def name= name > @name = name + ''bla bla'' > end > > end > > In Ruby I could do this, but this doesn''t affect my object at all...The key thing is that ActiveRecord attributes aren''t instance variables. You can use write_attribute to write to the store of attributes. Fred> > How can I do that? > > Thanks in advance > -- > Marco Antonio-- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
So you would do def name= name write_attribute :name, name end -- Jeremy Chase http://twitter.com/jeremychase On Thu, Apr 8, 2010 at 9:04 AM, Frederick Cheung <frederick.cheung-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> > > On Apr 8, 9:54 am, Marco Antonio Filho <marcoafi...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > > > class Unit < ActiveRecord::Base > > > > def name= name > > @name = name + ''bla bla'' > > end > > > > end > > > > In Ruby I could do this, but this doesn''t affect my object at all... > > The key thing is that ActiveRecord attributes aren''t instance > variables. You can use write_attribute to write to the store of > attributes. > > Fred > > > > How can I do that? > > > > Thanks in advance > > -- > > Marco Antonio > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Talk" group. > To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org > To unsubscribe from this group, send email to > rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org<rubyonrails-talk%2Bunsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org> > . > For more options, visit this group at > http://groups.google.com/group/rubyonrails-talk?hl=en. > >-- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
> > > class Unit < ActiveRecord::Base > > > > def name= name > > @name = name + ''bla bla'' > > end > > > > end > > > > In Ruby I could do this, but this doesn''t affect my object at all... > > The key thing is that ActiveRecord attributes aren''t instance > variables. You can use write_attribute to write to the store of > attributes."This method is deprecated on the latest stable version of Rails. The last existing version (v1.2.6) is shown here." http://apidock.com/rails/ActiveRecord/Base/write_attribute I''m sure I''ve seen it in later versions, but thought I''d post it anyway. If it is deprecated, another way is: self.attributes[''name''] = name + ''blah blah'' It''s not exactly the same as write_attribute (it doesn''t typecast to numbers for numeric columns) but it will work the same in your case. Cheers, Andy -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
On Apr 8, 2:32 pm, Andy Jeffries <andyjeffr...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> > I''m sure I''ve seen it in later versions, but thought I''d post it anyway. > > If it is deprecated, another way is: > > self.attributes[''name''] = name + ''blah blah'' > > It''s not exactly the same as write_attribute (it doesn''t typecast to numbers > for numeric columns) but it will work the same in your case.actually it is the same: active_record/base.rb says (in 2.3.5) def []=(attr_name, value) write_attribute(attr_name, value) end Couldn''t see any trace in the source of write attribute being marked as deprecated. Fred> > Cheers, > > Andy-- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
:Frederick Cheung:>Couldn''t see any trace in the source of write attribute being marked >as deprecated.It (ActiveRecord::Base#write_attribute) is not just deperecated, it is gone. But another method with the same name in a different class (ActiveRecord::AttributeMethods#write_attribute) replaced it. The new function has the same functionality and is in scope virtually everywhere the old one was. Thus to the end user, it is just the same as it has always been. In other words the function moved. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
Ahh OK, useful to know. It would be helpful (in languages/frameworks in general) if a deprecation always had a comment on where to look for more information. Generally Rails is good at this, but maybe that information isn''t filtered through to APIDock.com. Cheers, Andy -- Andy Jeffries http://andyjeffries.co.uk/ #rubyonrails #mysql #jquery Registered address: 64 Sish Lane, Stevenage, Herts, SG1 3LS Company number: 5452840 On 9 April 2010 03:05, Joe Smith <unknown_kev_cat-PkbjNfxxIARBDgjK7y7TUQ@public.gmane.org> wrote:> > :Frederick Cheung: > > Couldn''t see any trace in the source of write attribute being marked >> as deprecated. >> > > It (ActiveRecord::Base#write_attribute) is not just deperecated, it is > gone. But another method with the same name in a different class > (ActiveRecord::AttributeMethods#write_attribute) replaced it. The new > function has the same functionality and is in scope virtually everywhere the > old one was. Thus to the end user, it is just the same as it has always > been. > > In other words the function moved. > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Talk" group. > To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org > To unsubscribe from this group, send email to > rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org<rubyonrails-talk%2Bunsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org> > . > For more options, visit this group at > http://groups.google.com/group/rubyonrails-talk?hl=en. > >-- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.