Wes Gamble
2006-Aug-30 03:14 UTC
Dynamically calling attribute methods on ActiveRecord object
All,
I have an AR::Base descendant that has a database column named X
Given an instance obj of this object, I want to dynamically set X using
obj.send(''X=''.to_sym, ''value'').
I''ve done some testing with this two things present themselves:
1) None of the AR reader methods for the attributes spring into being on
the public interface of obj until you directly invoke one of them.
2) The AR writer methods for the attributes never spring into being on
the public interface of obj.
Therefore, it appears that I have to do
obj.send(''set_attribute'', ''X'',
''value'')
in order to set my value.
This kind of makes sense since method_missing is really generating the
AR attribute methods.
I wonder why the reader methods show up on the public interface of obj.
I''d kind of expect that none of those "magic" methods would
show up.
Sound right?
Wes
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Wes Gamble
2006-Aug-30 03:28 UTC
Re: Dynamically calling attribute methods on ActiveRecord ob
Argh. What I''ve said is wrong. I can dynamically call AR setters in script/console. Just not in my controller ... sigh :). Wes -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ 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-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk -~----------~----~----~----~------~----~------~--~---
Mark Van Holstyn
2006-Aug-30 03:34 UTC
Re: Dynamically calling attribute methods on ActiveRecord object
mvanholstyn@xena:$ ruby script/console>> p=Project.new >> p.send :name=, ''mark'' >> p.name=> "mark" Works for me... -- Mark Van Holstyn mvette13-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org http://lotswholetime.com --~--~---------~--~----~------------~-------~--~----~ 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-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk -~----------~----~----~----~------~----~------~--~---
Wes Gamble
2006-Aug-30 03:35 UTC
Re: Dynamically calling attribute methods on ActiveRecord ob
Whew. Thankfully obj.send(''X=''.to_sym,
''value'') works fine.
Sorry for the extra chatter. Hopefully someone will have the same
doubts I did and find this useful.
WG
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Mark Van Holstyn
2006-Aug-30 03:41 UTC
Re: Dynamically calling attribute methods on ActiveRecord ob
> > Argh. What I''ve said is wrong. I can dynamically call AR setters in > script/console. > > Just not in my controller ... sigh :). >def new @todo_list = TodoList.new @todo_list.send :name=, ''testing method'' end Show up properly in my form... Again, works for me :-) If its still a problem, post some code and maybe we can find a little glitch you missed. mark -- Mark Van Holstyn mvette13-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org http://lotswholetime.com --~--~---------~--~----~------------~-------~--~----~ 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-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk -~----------~----~----~----~------~----~------~--~---
zdennis
2006-Aug-30 05:20 UTC
Re: Dynamically calling attribute methods on ActiveRecord ob
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Wes Gamble wrote:> Whew. Thankfully obj.send(''X=''.to_sym, ''value'') works fine. > > Sorry for the extra chatter. Hopefully someone will have the same > doubts I did and find this useful.Object#send can take a String also. You don''t need the .to_sym on ''X='' Zach -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFE9SAhMyx0fW1d8G0RArhXAJ0Y0BapMQ3tOEki5HBLWYICkIKrkACfTKkX KVurIXiD1NlkvFOMeEOk9e4=TGQm -----END PGP SIGNATURE----- --~--~---------~--~----~------------~-------~--~----~ 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-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk -~----------~----~----~----~------~----~------~--~---