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We want to use SQL/active record for logging but limit the table size so that older messages disappear off of the table Some process has to run periodically to do that. Suppose I want to keep my table size to not much bigger than 50,000,000 rows or so. What is the easiest, most efficient way to delete any extra rows that there may be ? This is an SQL/active record problem I have not encountered

I just got set up with fedora 12 and am a new user for that distro. I got ruby 1.8.6 installed. Then I tried to install rails using yum which gave me rails 2.3.4. When I tried to start a rails project I had an error saying the wrong version of rack was supplied. I tried to resolve that with gem installs but got errors saying it couldn''t find rubygem sources. Then I decided to see if I

When doing RJS stuff of the form below, I seem to recall unexpected behavoir where if I had many method calls within that block things didn''t work as expected and variables would not have values I expected. I know I am not being very specific and I don''t have an example. I am trying to refactor some code where I have alot of code inside the block and I am affraid I am going to

I have a module as shown below and when I extend an active record to use it, I can not access the primary_key method. In a simple test program using a similar approach where active record is not involved, access to the class methods seems to work ok. What can I do to make this work or so that I can access the class methods ? ################################## require

I am using rubyzip and am trying to put a huge csv file with 1.4 million rows into the zip file. Using jruby I get a out of heap error. I believe the error happens in the block below: Zip::ZipOutputStream.open(zip_path) do |zos| zos.put_next_entry(File.basename(csv_path)) zos.print IO.read(csv_path) end -- You received this message because you are subscribed to the Google

In mongoid, a ORM mapped database object is like below. The part "type: String" seems to me to not fit into any standard ruby syntax and I was curious how does mongoid implement that ? class Step include Mongoid::Document field :Label, type: String field :Descript, type: String field :ErrorText, type: String embedded_in :step_data end -- You received this message

I have been asked a couple of times at job interviews if I am familiar with HAML or Liquid so I was wondering if maybe I should start using them and perhaps it would make the views easier to work with. If I install HAML on a machine where my app is that has alot of regular HTML in the .erb views already, will it still work with those or do I need to convert everything to HAML ? Can I have some

I am trying to put my app on heroku, following the instructions, when I get here I get this error: $ git push heroku master Enter passphrase for key ''/c/Users/Laurence/.ssh/id_rsa'': Counting objects: 277, done. Delta compression using up to 2 threads. Compressing objects: 100% (246/246), done. Read from remote host heroku.com: The connection was aborted fatal: sha1 file

I am having a problem using the test database in Rails 3. It apparently has kept track of aspects of the database that I deleted completely from my migrations at some point. I don''t always use the ''down'' part of a migration and sometimes just recreate the whole database. I did rake db:migrate:reset and rake db:test:prepare, but when I run my test it is trying to access

This is in windows .. So from irb, I can load hpricot ok. (ruby 1.8.7) C:\Users\Laurence\rails-play\plug-test>irb irb(main):001:0> require ''hpricot'' LoadError: no such file to load -- hpricot from (irb):1:in `require'' from (irb):1 irb(main):002:0> require ''rubygems'' => true irb(main):003:0> require

I have done a little polymorphic associations stuff and have refreshed my memory on it again. What it seems like is that if I have a particular record and I want to make it easy for many different parent records to associate with it using has_one or has_many, that is fine. If I want a parent record to have multiple kinds of children through one association, I don''t see how to do that

I get these errors : gem install pg -- --with-pgsql-include-dir=''/usr/include/pgsql'' -- with-pgsql-lib-dir=''/usr/lib/pgsql'' Building native extensions. This could take a while... ERROR: Error installing pg: ERROR: Failed to build gem native extension. /usr/bin/ruby extconf.rb --with-pgsql-include-dir=/usr/include/pgsql -- with-pgsql-lib-dir=/usr/lib/pgsql

I am trying to understand some rake stuff better .. I have a test that works fine if I do: "ruby test/integration/tcp_test.rb -n test_job_create" but if I try to do it in a rake file like below, it errors out. It seems the t.options is the problem because I can get it to work without that: /usr/bin/ruby -I"lib" "/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake/

I haven''t done any DRb stuff in awhile, but I used to connect to a DRb server from a rails controller. I''ve never tried it in rails 3 and am wondering if Rails 3 is stricter about something like this or why it hasn''t worked thus far. My server/client code and error are shown below: SERVER: require ''drb'' class ParserSvc def initialize end

I have been having a strange problem with including active record outside of rails when it works ok in rails 3.0.3. When I do ''gem list'', I get this: actionmailer (3.0.9, 3.0.3) actionpack (3.0.9, 3.0.3) activemodel (3.0.9, 3.0.3) activerecord (3.0.9, 3.0.3) activeresource (3.0.9, 3.0.3) activesupport (3.0.9, 3.0.3) So then I tried the code below, but I get this error:

We are using Ruby Sinatra running on JRuby with tomcat as a server. I saw where it was claimed you could get a console in Sinatra by doing something like this: irb -r my_sinatra_app.rb for me that would be jruby -S rb my_sinatra_app.rb but I get this error when I do that as obviously tomcat must initialize some things: C:/Tomcat60/webapps/ROOT/WEB-INF/vendor/activerecord-jdbc-

I am using this jquery file upload plugin. In firefox it has progress bars, but these don''t work in IE. We are using Sinatra/JRuby/tomcat This is the plugin: https://github.com/blueimp/jQuery-File-Upload I believe the progress bars don''t work in IE, because IE doesn''t support that in ajax until version 10 and we have to support version 9. This page summarizes

I have heard alot about Node.js and watched a few tutorials and read some stuff. I get the impression that in certain situations AJAX calls with node.js is alot faster than with rails. I also have somewhat of an impression that with Rails web sockets are complicated to implement but with node.js web sockets might be alot easier. I am trying to figure out if I should learn some node.js or

I sometimes get this message on a dev box I log into remotely: Ruby Interpreter (CUI) 1.9.2p180 [i386-mingw32] has stopped working A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available. --------------------------------------------------------------------------------- I basically have a a couple of ruby daemons and a

When I run a command program (rails 3/ruby 1.9.2) as this: class MsdsAttr < ActiveRecord::Base include MsdsAttrModule belongs_to :attribute_record, :polymorphic => true has_many :attribute_values, :foreign_key => ''attribute_id'' has_many :alt_values, :as => :alternative has_many :msds_ingredients end ActiveRecord::Base.establish_connection( :adapter =>