I hava a reply model:
------------------------------------------------------------------------------------------------------------------------------------------------------------------------
class Reply < ActiveRecord::Base
belongs_to :topic
before_create { |record|
Topic.find(record.topic_id).update_attributes!(:last_reply_id =>
record.id)}
end
------------------------------------------------------------------------------------------------------------------------------------------------------------------------
And a topic model:
------------------------------------------------------------------------------------------------------------------------------------------------------------------------
class Topic < ActiveRecord::Base
has_many :replies
end
------------------------------------------------------------------------------------------------------------------------------------------------------------------------
And i write a topic spec here:
---------------------------------------------------------------------------------------------------------------------------------------------------------------------
...........
it "should know the last reply" do
@topic.save
reply = @topic.replies.build
reply.save
reply.topic.should === @topic
@topic.last_reply_id.should == reply.id
end
............
---------------------------------------------------------------------------------------------------------------------------------------------------------------------
last_reply_id is for the topic''s latest reply id, when i run the
test ,i got this :
''Topic should know the last reply'' FAILED expected: 10,
got: nil (using ==)
spec/models/topic_spec.rb:26:
spec/models/topic_spec.rb:3:
Why i couldn''t save the last_reply_id for topic????Help me!!
--~--~---------~--~----~------------~-------~--~----~
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?hl=en
-~----------~----~----~----~------~----~------~--~---
On Sun, Apr 13, 2008 at 10:24 AM, Ragnarok <ysorigin-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> > I hava a reply model: > > ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ > class Reply < ActiveRecord::Base > belongs_to :topic > > before_create { |record| > Topic.find(record.topic_id).update_attributes!(:last_reply_id => > record.id)} > > end > > ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ >Since you''re doing this in before_create, I don''t think that record (the Reply instance) will have an id yet. If you switch the callback to an after_create, does it work? Craig --~--~---------~--~----~------------~-------~--~----~ 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?hl=en -~----------~----~----~----~------~----~------~--~---
On Apr 13, 11:01 pm, "Craig Demyanovich" <cdemyanov...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> On Sun, Apr 13, 2008 at 10:24 AM, Ragnarok <ysori...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > > > I hava a reply model: > > > ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ > > class Reply < ActiveRecord::Base > > belongs_to :topic > > > before_create { |record| > > Topic.find(record.topic_id).update_attributes!(:last_reply_id => > > record.id)} > > > end > > > ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ > > Since you''re doing this in before_create, I don''t think that record (the > Reply instance) will have an id yet. If you switch the callback to an > after_create, does it work? > > CraigIt''s the same too! i try after_create,before_save,after_save ...,it also couldn''t work! --~--~---------~--~----~------------~-------~--~----~ 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?hl=en -~----------~----~----~----~------~----~------~--~---
On Sun, Apr 13, 2008 at 11:20 AM, Ragnarok <ysorigin-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> > It''s the same too! i try after_create,before_save,after_save ...,it > also couldn''t work!I played with this a little bit, but I couldn''t make it work with callbacks. As an alternative, to get the latest reply''s id, you could just do @topic.replies.last.id instead of storing last_reply_id on Topic. I think that this approach will rely on the sequence of IDs instead of record timestamps, but it may suffice for you. Craig --~--~---------~--~----~------------~-------~--~----~ 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?hl=en -~----------~----~----~----~------~----~------~--~---
On Apr 14, 3:58 am, "Craig Demyanovich" <cdemyanov...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> On Sun, Apr 13, 2008 at 11:20 AM, Ragnarok <ysori...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > > > It''s the same too! i try after_create,before_save,after_save ...,it > > also couldn''t work! > > I played with this a little bit, but I couldn''t make it work with callbacks. > As an alternative, to get the latest reply''s id, you could just do > > @topic.replies.last.id > > instead of storing last_reply_id on Topic. I think that this approach will > rely on the sequence of IDs instead of record timestamps, but it may suffice > for you. > > CraigThank you!i try with a virtual attribute, and it''s work ! but i couldn''t understand , why it doesn''t work with callback method!? i want to know the reason! --~--~---------~--~----~------------~-------~--~----~ 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?hl=en -~----------~----~----~----~------~----~------~--~---
Try reloading your topic model before you check the last_reply_id... Mark On Sun, Apr 13, 2008 at 10:24 AM, Ragnarok <ysorigin-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> > I hava a reply model: > > ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ > class Reply < ActiveRecord::Base > belongs_to :topic > > before_create { |record| > Topic.find(record.topic_id).update_attributes!(:last_reply_id => > record.id)} > > end > > ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ > > > > And a topic model: > > ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ > class Topic < ActiveRecord::Base > has_many :replies > end > > ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ > > > > And i write a topic spec here: > > --------------------------------------------------------------------------------------------------------------------------------------------------------------------- > ........... > it "should know the last reply" do > @topic.save > reply = @topic.replies.build > reply.save > reply.topic.should === @topic > @topic.last_reply_id.should == reply.id > end > ............ > > --------------------------------------------------------------------------------------------------------------------------------------------------------------------- > > > > last_reply_id is for the topic''s latest reply id, when i run the > test ,i got this : > ''Topic should know the last reply'' FAILED expected: 10, > got: nil (using ==) > spec/models/topic_spec.rb:26: > spec/models/topic_spec.rb:3: > > > > Why i couldn''t save the last_reply_id for topic????Help me!! > > >-- Mark Van Holstyn, Partner / Software Developer mvanholstyn-y/MygF1AHQSJ0iEMtI82hwC/G2K4zDHf@public.gmane.org, (616) 706-6842 Mutually Human Software, http://mutuallyhuman.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?hl=en -~----------~----~----~----~------~----~------~--~---