similar to: how to disable callback

please can some kind soul point me to the right track. how can I express: "do something when any field of this class is updated except field X" I need to do anything that would behave like after_update :do_something #unless the updated field is field X that is: after_update is called every time a set_ method is called, except set_x Is that at all possible? Isabelle -- Posted

Hello I''ve now read a lot about application-level authentication in Rails, but I need to do database-level authentication. The reason is that my database needs to have the current_user (database current_user, not current_user defined in an ActiveRecord Model) set to execute triggers for automatically updating audit tables. So it is not enough to have a session check against a User

hello it seems like this question has appeared a few times with no answer: how do you get rails to issue ''write'' statements (ie ''CREATE/UPDATE'') to the database without committing each time? I tried setting ActiveRecord::Base.connection.begin_db_transaction before calling any action on my object, but as soon as myObject.save or myObject.update is called,

What are the limitations on using: errors.add_to_base to display errors in views? I have tried for days to add errors from my object.rb and they never get displayed. class Keyword < ActiveRecord::Base validates_presence_of(:name, :message => "Name is required.") validates_uniqueness_of(:name, :message => "This name is already in use. Please try

Hello, I just installed Ruby on Rails and created the new repository. I wanted to use Ruby on Rails with FCGI The repository was created in /path/to/public_html ls /path/to/public_html/ : app cgi-bin config doc log public README script tmp asd components db lib logo.jpg Rakefile README_LOGIN test vendor I installed fcgi support for ruby on rails and

How do I get ''save'' to execute without commit? I have tried: ActiveRecord::Base.connection.begin_db_transaction # do some stuff that doesn''t issue a database COMMIT statement # then: @myObject.save # this issues a COMMIT but it shouldn''t! Shouldn''t it wait until I''ve called: ActiveRecord::Base.connection.commit_db_transaction ? what am

Hi has anyone managed to use update_all with rails on postgres? In my setup, it does not work: >> @keyword.update_all(myupdates) NoMethodError: undefined method `update_all'' for #<Keyword:0xb7ac4670> from /home/lib/ruby/gems/1.8/gems/activerecord-1.14.0/lib/active_record/base.rb:1786:in `method_missing'' from (irb):14 I checked that the base.rb

I can''t seem to get a model observer to work. In my environment.rb I have: config.active_record.observers = :item_observer In item_observer.rb I have: class ItemObserver < ActiveRecord::Observer observe Item def after_update(item) if @old.active != item.active logger.debug ''observer#after_update'' #... end @old = nil end def

Hi, I am trying to replace my old database trigger with ActiveRecord callbacks in rails. I have a model like following: class Action < ActiveRecord::Base belongs_to :inquiry def after_update #clean up all action associated with the inquiry. Action.update_all("latest = ''''", ["inquiry_id = ?", self.inquiry_id]) #find the latest action

Hi All, Having problem setting up an observer to log changes to a database. I have following the Prag Rails book but think I have something missing. I am trying a simple puts to see if the observer is working, but getting nothing on the console. Here is what I have. I don''t get any errors. Thanks for any suggestions/references to debugging. Dave The two models: display_ad.rd

Hi ! I have a problem using an external script to change password : in smb.conf, i have : => passwd chat = "Changing password for*\nNew password*" %n\n "\nRetype new password*" %n\n => passwd chat debug = Yes => log level = 100 => unix password sync = Yes => passwd program = /usr/local/sbin/smbldap-passwd %u The script is called normally, and logs show that the

Hi All I wanted a little advice on the convention for namespace usage and organisation of code. I originally used PHP and often had an "admin" backend that performed the various admin tasks with users, and data Then I had a front-end often situated at the root that had user services. I''m trying to emulate this in Rails but feel I''m missing a significant point here and

I have this situation where in an after_update, I would like to know the previous value of the record instead of simply being notified the record has been updated. For example let''s say I had a table called ''foo'' which had a field ''new_flag''. I want to know when the ''new_flag'' field changes from 0 -- > 1 in an after_update so I

I''m not sure how to implement this so I''ll describe what I currently have done then what I wish to have happen currently, I have a generic observer for several models class AuditObserver < ActiveRecord::Observer observe Foo, Bar def after_update(model) model.log("UPDATED " + Time.now.strftime("%m-%d-%Y %H:%M")) end def after_create(model)

In the RoR API documentation (http://api.rubyonrails.org/classes/ActiveRecord/Callbacks.html) for callbacks, there is a note that says: "*IMPORTANT:* In order for inheritance to work for the callback queues, you must specify the callbacks before specifying the associations. Otherwise, you might trigger the loading of a child before the parent has registered the callbacks and they won?t

problem: validation error is not functionning in callback callback for many-to-many association: # keyword.rb :before_add => :reject_self_related def reject_self_related(related_keyword) if (related_keyword == self) # this does not work: errors.add(:name, "Relating a keyword to itself is forbidden!") raise "Relating a keyword to itself is

This example is caused by R's messing with formula environments. That's explained in ?formula, but should it not be explained in ?model.frame ? Simple test: data <- data.frame(y=rnorm(100), x=1:100) testit <- function(formula) { weights <- runif(100) glm(formula, weights=weights, data=data) } testit(y ~ x) weights is looked for in the environment of the formula, not of

I want to include common auditing functionality in my models. This involves storing the changes made to a model in a seperate table : I have created the functions in an Audit module : module Audit before_update :before_changes after_update :after_changes def before_changes old=self.class.find(id).attributes @changes=[] attributes.each do |key, val| if val != old[key]

Hello Everybody, I have a problem with the output of lm. In fact, when I compare the R output and the Splus output, the results appears to be different : I have a dataframe with 5 factors , 16 rows and a response. First, I tried to fit this response to a linear model : lm(rep~(A+B+C+D+E),data). The results beetween SPlus and R are different. In a second time, I tried a new fit :

Hey guys, I''m having a hard time w/ the after_update callback on rails... As far as I can tell, when I define a after_update callback on a model, the attributes of the object have the same values that they had *before* Base.save was called. I''m probably wrong so here''s the code: UNIT TEST: def test_register_item_adjusts_account_balance account =