similar to: ActiveRecord, computed values, and associations

I''m using observe_form in a place that does not require any response from the server. So I do not use an update paramater. But without it webbrick hangs for a couple seconds and returns a status 500. On occasion, there will even be an exception in webbrick''s output if I change the form then quickly click a link before the couple second hang is done. If a add an update, it

In my rails application, certain computers were having huge problems. There were certain pages that were exceptionally slow, even to the point of timing out. Other computers did not have a problem. I finally found that Firefox was the difference. When using Firefox on those computers it works fine. The slow pages were typically posting a form with a couple hundred fields. This behavior was

I want to create an internal admin view to display the output of "show variables" from mysql. What''s the best approach do this? For example, I''m doing something like this: @variables = ActiveRecord::Base.find_by_sql "show variables;" Then, I get stuff like this back (227 elements in @variables) in script/console: >> @variables[0] =>

It seems that using a join model that joins with two has_many''s will fail to generate proper SQL class StudentSemesterRecord < ActiveRecord::Base belongs_to :semester has_many :discipline_records, :through => :semester end class Semester < ActiveRecord::Base has_many :student_semester_records has_many :discipline_records end class DisciplineRecord <

Hi, I''m trying to write a macro which defines methods. One of these should have a parameter, but I can''t get that to work. Something like: define_method("printstuff") do puts "blabla" end works fine. But, how do I use define_method to create something like: def printstuff(the_stuff) puts the_stuff end Thanks in advance.

Hello all! I have two views (list_1 and list_2) that show a list of users in two different ways. In the views for these actions there is a link to edit a specific user properties (edit_user). That works fine, except that when I change the user I want to go back to the view that originated the request and not to the default list (list_1). Can anyone help me? Best regards, Hugo -- Posted via

It seems to me that Validations are quite useful for many objects, even ones having nothing to do with ActiveRecord. Common examples are Contact Us forms, multi-step forms, web service paramater validations, etc. I took a look at the source for Validations, and it seems that it is very independent from ActiveRecord. I caught only three depenedencies: 1. validates_numericy --> depends on

Hi, For those who might not be aware, rjb is a killer gem for using java classes inside your rails app (or any ruby code). Check it out at: http://rubyforge.org/projects/rjb/ I was able to successfully use it in one of my apps that required some code that is only available in java. And it''s much nicer than having to compile a java app, then shell out using backticks, get back the return

How do you run an ad-hoc query that does not belong in any model? I thought it was something like ActiveRecord::connection.find("my query..."), but I can''t seem to find the documentation on it. I know I''ve seen it somewhere before, though. thanks, Jeff -- Posted via http://www.ruby-forum.com/.

Hi I''ve got the error in the log file "marshal data too short" after I try to store some data into session. After doing some research on the internet, it looks like the problem was caused by pstore.rb. It is there way to solve this problem? Thank you -- Posted via http://www.ruby-forum.com/.

Hello happy Railers, I used to develop with a local out-of-the-box Apache and load times were pretty slow (like a few seconds each page). "Well, it''s the price to pay for no compile / cache / etc..." I thought. Nonsense. Yesterday I installed SCGI, and now I''ve got the best of both worlds: rails development env uses my very latest modifications, while SCGI ensures I

Hi all, I am setting up my second server with Samba 3.0.21c with LDAP as described in Samba3-ByExample. The server OS is Slackware Linux 10.2, without PAM. All seemed to work perfect until I decided to try folder redirection. I followed the instructions given in the "happy users" chapter, but now new users cant log in. When trying to log in with a new user (umgrtest16) from a WinXP SP2

Hello, I am running in to an error trying to run mongrel. The server starts but then trying to access any url in my application throws this error: calling Dispatcher.dispatch uninitialized constant RailsHandler::Dispatcher ./script/../config/../vendor/rails/activesupport/lib/active_support/dependencies.rb:477:in `const_missing''

Hi, I''m trying to execute something like this method in a model: def self.sql_for_rankings() sql = "SET @counter:=0;" sql << " SET @counter:=0; SELECT *, @counter:=@counter+1 AS rank FROM testscores. " find_by_sql(sql) end Where the new rank column is a kind of autoincrementer inside of

Given the case of validating the presence of an attribute and then performing other tests on said attribute, how do you go about not having to check for nil in the other tests? Example: validates_presence_of :start_date, :end_date validate :validate_start_date_before_end_date def validate_start_date_before_end_date # without this check an exception will be thrown on access to the

I had a statement that was generating a warning about parenthesise argument for future version. The interesting thing was it would crash the page with an input/output error on my production linux server, but worked fine in webbrick/windows. I finally tracked it down to it crashed when trying to print the warning to the console. If I kept the terminal open that I started the server on it would

I was trying to do SUM based mySQL query simliar to the following: SELECT SUM(updated_on - created_on) AS total from signups If I were to run this command in the mySQL console I would get a result. However, if I were to run it using the following command in Rails: Signup.find_by_sql("SELECT SUM(updated_on - created_on) AS total from signups") The query that is written to the log is:

One of my models has a column that is updated very frequently from a separate process, so it is important that when a record is saved in rails, this column should be left alone. In the update method of the controller I have: @record = MyModel.find(params[:id]) @record.update_attributes(params[:my_model]) params[:my_model] doesn''t have a reference to the column I''m talking

has_many.count does not seem to support an options hash like ActiveRecord::Base.count does. Example: >> AcademicProgram.find(:first).course_requirements.count :conditions => "courses.name LIKE ''a%''", :include => :course => 40 >> ap.ap_requirements.count :conditions => "courses.name LIKE ''a%''", :include =>

I''d like to include the user name along with/instead of the session id in my log files. Is there a place to customize the log format, or do I just need to through the logger object and manually write it in a before_filter on my ApplicationController? Thanks. -- Jack Christensen jackc@hylesanderson.edu