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• How to display an activity loader automatically with all ajax requests?

  - by user257797

  I am working on Ruby on Rails application, with Prototype. I want to display a loading div automatically with every ajax request and hide it on completion, without writing code for every ajax request in my application. Is there anyway to do this. <div id="loader">Loading...</div>

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• Coding alternative shaded rows?

  - by ming yeow

  I want alternative rows in my table to be shaded. what is the best way to do this, javascript, rails? Today, i do a simple <% num % 2%, but this is such a common operation that i think there should be a smarter way to do it

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• Transforming Datetime into month, day and year?

  - by bgadoci

  I can't seem to find this and I feel like it should be easy. In Ruby on Rails, how do I take: 2010-06-14 19:01:00 UTC and turn it into June 14th, 2010 Can I not just use a helper in the view?

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• validation of special characters

  - by jpallavi

  i want to put validation in ruby on rails that my username should not contain special characters like !@#$%^*()_-+=/<?:'";. Please tell me how can i implement it in my code.

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• Model def in View State

  - by tinzawtun

  In my ruby on rails project in model, I have some of definition. class PlaySport < ActiveRecord::Base belongs_to :user belongs_to :sport def self.getLevel end def self.check_play_sport(cuser_id,sport_id) end def current_playing_sport end def all_played_sports end end I catch for this relation like this current_user.play_sports.current_playing_sport But I get the undefined method error "current_playing_sports" What is wrong

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• How to create an after_save callback on runtime

  - by dorelal

  I am using ruby on rails 2.3.5 . I have user instance. On run time depending on certain conditions I want to add an after_save callback just for this instance. The other issue is that this after_save should take a block or a proc as parameter. What I want is something like this. This is psuedo code. user = User.first proc = Proc.new do puts 'this is foo' end user.after_save proc

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• Permission denied for folder creation using background_fu

  - by Anubhaw

  Hi All, I am calling a controller method to convert a video file. This process is called using background_fu job. When the function tries to create a new folder in rails root it gives error i.e. Permission denied. The function performs well if not called in background job process. Can any one point out what can be the trouble. Thanks in advance, Anubhaw

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• Calling to_xml on an Array of ROXML objects results in an empty collection

  - by findchris

  Hi there. I have a ROXML object that looks like: class Activity include ROXML xml_accessor :id end If I have an array of these objects and call .to_xml on the array, I receive an empty xml collection: "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<activities type=\"array\">\n</activities>\n" Any idea why or how to fix this? I'm running Rails 2.3.5 with the newest version of ROXML. Thanks

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• ActiveRecord find starts with

  - by robintw

  Really simple question - how do I do a search to find all records where the name starts with a certain string in ActiveRecord. I've seen all sorts of bits all over the internet where verbatim LIKE SQL clauses are used - but from what I've heard that isn't the 'correct' way of doing it. Is there a 'proper' Rails way?

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• is there mysql corelib site for building queries?

  - by mjeason

  Maybe i have the wrong context but... Is there a corelib site for mysql like http://corelib.rubyonrails.org/ for ruby on rails RoR? Would be nice to have 1 stop shop. thx.

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• Limiting records in a model action...

  - by bgadoci

  How do I limit the number of records that I am outputting with the following code to only 3 records: User.rb def workouts_on_which_i_commented comments.map{|x|x.workout}.uniq end def comment_stream workouts_on_which_i_commented.map do |w| w.comments end.flatten.sort{|x,y| y.created_at <=> x.created_at} end html.erb file <% current_user.comment_stream.each do |comment| %> ... <% end %> UPDATE: I'm using Rails 2.3.9

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• map.resources, :as => root?

  - by Newy

  I'd like to map my Users to root - so '/:id'. I do the following now map.connect ':id', :controller = 'users', :action = 'show' ... but I'd also like the links that are generated by Rails to have this format. Can I do a map.resources ... :as = :root or something similar?

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• How to expire a caches_action with a cache_path?

  - by fstephany

  I'm caching an index action with the following: caches_action :index, :cache_path => Proc.new { |c| c.params } expire_action :action => :index The expire_action seems to only expire the index action without any parameters. How can I expire all the caches_action related to index ? (it is a Rails 2.3.5 application)

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• Click to select from a list of tags in jQuery

  - by Michael Doornbos

  I'm struggling to find a tag selection UI for a rails app. Ideally it would be something like the selection here on Stackoverflow, or on Delicious or Digg. I want users to be able to select multiple tags with a single click. We're already using jQuery, so it makes sense to use something that takes advantage of that. I've used the selection ui in jQuery and I'm not thrilled about having users need to hold down ctrl to select multiple tags.

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• Notify by email when passenger error occurs

  - by foresth

  Hello, is it possible to send notification emails when passenger error occurs? Something similar to the email sending by exception notifier when there is an error in Rails app. I wonder because now we have no way to find out if someone hits an unexpected app spawner or other error (like memory limit etc.). Thank you!

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• I need to run some code only 40% of the times, how may i do this?

  - by user305270

  [Rails] I need to run some code only 40% of the times, how may i do this? i need to make some square items, and there can be a max of 5 per row, and a min of 1 per row. then i want to have a row with 2 boxes, 5boxe, 1 box and so on, random... the last box of the row, will have a clear:both class..

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• Mac OSX Mountain Lion Rails Postgres (wiped out a lot of stuff)

  - by kurtybot

  Having trouble with Postgres since I upgraded to Mountain Lion (and now regretting it). Lost hours trying to fix it to no avail. When running rails server then visiting my app at 0.0.0.0:3000 I get this error. psql: could not connect to server: No such file or directory. Is the server running locally and accepting connections on Unix domain socket "/var/pgsql_socket/.s.PGSQL.5432"? tried updating xcode.

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• Sun Tool-less Slide Rails Removal for X4150

  - by Ablue

  I have some tool-less slide rails for some 1ru x4150 sun servers. I can't seem to see how to remove them. Sun in their wisdom did not include this seemingly important information in their documentation; they simply (possibly with a cheeky smile) say to... "Refer to the (long since lost) installation card included with the rackmount kit for instructions on attaching tool-less slide-rail assemblies to the rack." So if anyone knows please let me know.

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• Ruby on rails gems and win 7

  - by cbrulak

  I have a networked home share (at work). This is my HOMEPATH,HOMESHARE,etc. When I installed the rails gem and other the .gems folder was created there (which is on a network drive) and consequently any code that needs a gem or a gem lookup is slow. And I'm wondering which environment variables need to be corrected. I've googled this but most results are dealing with cygwin so any ideas? Thanks

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• Serving Ruby pages without Rails?

  - by Miko

  How would I go about displaying Ruby-generated dynamic pages without relying on a framework, such as Rails? My intention is to serve Ruby .erb pages just as I would with .php files. My server uses EngineX, which seems to play well together with Passenger.

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• Anyone using JRuby-Rack with Rails 3?

  - by Megaduck

  Is anyone else out there running Rails 3 and JRuby-Rack, or Jetty and Rails 3? Any trick to it? I'm going insane with some debugging, and at this point I just want to know that it's possible.

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• authlogic - do I still need Rails sessions?

  - by tg

  Hi, I'm a newbie to Rails and am starting a new project that uses AuthLogic. I'm just a little confused about whether AuthLogic provides everything I need to store session state, or whether I still have to include the Rails mechanism (rake db:sessions:create). Thanks! T

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• Django foreign key error

  - by Hulk

  In models the code is as, class header(models.Model): title = models.CharField(max_length = 255) created_by = models.CharField(max_length = 255) def __unicode__(self): return self.id() class criteria(models.Model): details = models.CharField(max_length = 255) headerid = models.ForeignKey(header) def __unicode__(self): return self.id() In views, p_l=header.objects.filter(id=rid) for rows in row_data: row_query =criteria(details=rows,headerid=p_l) row_query.save() In row_query =criteria(details=rows,headerid=p_l) there is an error saying 'long' object is not callable in models.py in __unicode__, What is wrong in the code Thanks..

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• How do I list all classes of a given type in a python file?

  - by Hobhouse

  I use django, and have a lengthy models.py file. class Foo(models.Model): name = models.CharField() class Bar(models.Model): name = models.CharField() class Fab(models.Model): name = models.CharField() Is there a way to make a list of all the classes in the file which are an instance of (models.Model)?

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• Django ForeignKey created empty?

  - by Scott Willman

  This seems very basic and I must be missing something, but here goes anyways... With two models like so: class School(models.Model): name = models.CharField("Official School Name", max_length=128) address = models.TextField("Address of the School", max_length=256) mascot = models.CharField("Name of the School Mascot", max_length=128) class StudentProfile(models.Model): name = models.CharField(max_length=128) school = models.ForeignKey(School) If the student gets created before the school, how do I give 'school' a default empty value? Is it blank or null or what? Thanks!

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