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• I am having trouble with my first project in ruby on rails

  - by Sebastian

  Here's my index action in the books controller: http://pastebin.com/XdtGRQKV Here's the view for the action i just mentioned: http://pastebin.com/nQFy400m Here's the result without being logged in: http://i.imgur.com/rQoiw.jpg Here's the result when i'm logged in with the user 'admin': http://i.imgur.com/E1CUr.jpg So the problem is that, in the view, before line 25 the 'user' variable seems to be empty ( or not loaded), and after line 25 the variable 'user' has the expected values. I have tried initializing a variable in the index method of the books controller but get exactly the same results. Thanks in advance! BTW had to make the links text because of stackoverflow limit.

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• ruby subclass filter

  - by Nik

  Hey! Maybe I am getting the idea of a subclass wrong, but I have a Person model and it has an attrib called "age" so Person.first.age #=> '20' Now I want to have a model that's basically persons 55 or older so I know I can have a class like this: class Senior < Person end But how can I "pre-filter" the Senior class so that every object belonging to that class has age = 55? Senior.first.age #=> 56 Thanks!

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• How to evaluate the string in ruby if the string contains ruby command?

  - by Arun

  In my case, I was storing the sql query in my database as text. I am showing you one record which is present in my database Query.all :id => 1, :sql => "select * from user where id = #{params[:id]}" str = Query.first Now 'str' has value "select * from user where id = #{params[:id]}" Here, I want to parsed the string like If my params[:id] is 1 then "select * from user where id = 1" I used eval(str). Is this correct?

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• Best Solution For Authentication in Ruby on Rails

  - by Dan Wolchonok

  I'm looking for a pre-built solution I can use in my RoR application. I'm ideally looking for something similar to the ASP.NET Forms authentication that provides email validation, sign-up controls, and allows users to reset their passwords. Oh yeah, and easily allows me to pull the user that is currently logged into the application. I've started to look into the already written pieces, but I've found it to be really confusing. I've looked at LoginGenerator, RestfulAuthentication, SaltedLoginGenerator, but there doesn't seem to be one place that has great tutorials or provide a comparison of them. If there's a site I just haven't discovered yet, or if there is a de-facto standard that most people use, I'd appreciate the helping hand.

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• Ruby: totalling amounts

  - by Michael

  I have a Donation.rb model with an amount column that takes an integer. I want to sum all the individual donations together and show the total on the home page. In the home_controller, I'm doing @donations = Donation.all and then in the view I do <% sum = 0 %> <% @donations.each do |donation| %> <%= sum += donation.amount if donation.amount? %> <% end %> The problem is that this is printing the running sum each time a new donation is added to it. I just want the total sum at the end after they've all been added together.

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• Ruby on rails 2 level model

  - by jony17

  I need some help creating a very simple forum in a existing model. What I want in a Game page, have a mini forum, where is possible create some topics and some comments to this topics. In the beginning I'm only implement topics. This is the error I have: Mysql2::Error: Column 'user_id' cannot be null: INSERT INTO `topics` (`game_id`, `question`, `user_id`) VALUES (1, 'asd', NULL) This is my main model: game.rb class Game < ActiveRecord::Base attr_accessible :name validates :user_id, presence: true validates :name, presence: true, length: { maximum: 50 } belongs_to :user has_many :topics, dependent: :destroy end topic.rb class Topic < ActiveRecord::Base validates_presence_of :question validates_presence_of :game_id attr_accessible :question, :user_id validates :question, length: {maximum: 50}, allow_blank: false belongs_to :game belongs_to :user end topic_controller.rb def create @game = Game.find(params[:game_id]) @topic = @game.topics.create(params[:topic]) @topic.user_id = current_user.id respond_to do |format| if @topic.save format.html { redirect_to @game, notice: 'Topic was successfully created.' } else format.html { render action: "new" } end end end game/show.html.erb <h2>Topics</h2> <% @game.topics.each do |topic| %> <p> <b>Question:</b> <%= topic.question %> </p> <% end %> <h2>Add a topic:</h2> <%= form_for([@game, @game.topics.build]) do |f| %> <div class="field"> <%= f.label :question %><br /> <%= f.text_field :question %> </div> <div class="actions"> <%= f.submit %> </div> <% end %> Thanks ;)

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• ruby looping question

  - by jonepatr

  Hello! I want to make a loop on a variable that can be altered inside of the loop. first_var.sort.each do |first_id, first_value| second_var.sort.each do |second_id, second_value_value| difference = first_value - second_value if difference >= 0 second_var.delete(second_id) else second_var[second_id] += first_value if second_var[second_id] == 0 second_var.delete(second_id) end first_var.delete(first_id) end end end How do I do this, because this doesn't work?

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• Block call in Ruby on Rails

  - by Mattias

  Hi, I'm trying to clean up my code and get rid of a lot of ugly hashes. In my views I define several actions like this: @actions = { :interest => {'Show interest', link_to(..), :disabled => true}, :follow => {'Follow this case', link_to(..)} ... } As these hashes grow, the maintainability decreases. I want to convert the above format to something like: actions do item :interest, 'Show interest', link_to(..), :disabled => true item :follow, 'Follow', link_to(..) ... end How do I structure my helper methods to allow this? Preferably the 'item'-method should only be available in the 'actions' block and not in the global scope. Thanks!

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• Project Euler 52: Ruby

  - by Ben Griswold

  In my attempt to learn Ruby out in the open, here’s my solution for Project Euler Problem 52.  Compared to Problem 51, this problem was a snap. Brute force and pretty quick… As always, any feedback is welcome. # Euler 52 # http://projecteuler.net/index.php?section=problems&id=52 # It can be seen that the number, 125874, and its double, # 251748, contain exactly the same digits, but in a # different order. # # Find the smallest positive integer, x, such that 2x, 3x, # 4x, 5x, and 6x, contain the same digits. timer_start = Time.now def contains_same_digits?(n) value = (n*2).to_s.split(//).uniq.sort.join 3.upto(6) do |i| return false if (n*i).to_s.split(//).uniq.sort.join != value end true end i = 100_000 answer = 0 while answer == 0 answer = i if contains_same_digits?(i) i+=1 end puts answer puts "Elapsed Time: #{(Time.now - timer_start)*1000} milliseconds"

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• Render Ruby object to interactive html

  - by AvImd

  I am developing a tool that discovers network services enabled on host and writes short summary on them like this: init,1 +-- login,1560 -- +-- bash,1629 +-- nc,12137 -lup 50505 { :net = [ [0] "*:50505 IPv4 UDP " ], :fds = [ [0] "/root (cwd)", [1] "/", [2] "/bin/nc.traditional", [3] "/xochikit/ld_poison.so (stat: No such file or directory)", [4] "/dev/tty2", [5] "*:50505" ] } It proved to be very nice formatted and useful for quick discovery thanks to colors provided by the awesome_print gem. However, its output is just a text. One issue is that if I want to share it, I lose colors. I'd also like to fold and unfold parts of objects, quickly jump to specific processes and what not? Adding comments, for example. Thus I want something web-based. What is the best approach to implement features like these? I haven't worked with web interfaces before and I don't have much experience with Ruby.

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• How much to charge Ruby on Rails Website [closed]

  - by eWizardII

  I figured it be appropriate to ask this question on webmasters, over the stackoverflow site seeing as there are similar questions here. I am freelancing for a client in the Boston area, who has the html/css templates for their site made by another web designer. They are basically looking for someone to set up the template, and then make the backend so that a user can purchase music on their site (they are musicians). I am wondering then what would be an appropriate amount to charge them to develop such a system, I am a student, and this would be my 3rd Ruby on Rails project, but probably at least the 20 web design project I have been hired to do and I have other programming knowledge, Python, C, etc. I am thinking of suggesting that they pay 1000usd to set up such a system, but I don't know if this is appropriate. To me it seems justifiable given my experience, and the low end of RoR developers I have seen charging 25usd/hr all the way up to 150usd/hr. Any advice would be appreciated.

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• Ruby on Rails background API polling

  - by Matthew Turney

  I need to integrate a free/busy calendar integration with Zimbra. Unlike outlook, it seems, Zimbra requires polling their API. I need to be able to grab the free/busy data in background tasks for 10's of thousands of users on a regular time interval, preferably every few minutes. What would be the best way to implement this in a Rails application without bogging down our current resque tasks? I have considered moving this process to something like node.js or something similar in Ruby. The biggest problem is that we have no control over the IO, as each clients Zimbra instances could be slow and we don't want to create a huge backup in tasks. Thoughts and ideas?

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• Zune API Library for Ruby

  - by kerry

  Those of you who know me, know my favorite music player is the Zune. For some reason it seems most of my spare time lately seems to be creating Zune API libraries for different languages (I have a PHP one as well).  Here’s another one for Ruby!  If you use it, let me know.  I would love to hear what people are working on. It’s hosted at github, and very easy to use. zune_card = Zune::ZuneCard.for('a_zune_tag') Checkout the README for deets on what fields the object will have.

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• Good ergonomic keyboards for ruby/rails programmer using vim (on Mac) [closed]

  - by Brand

  I'm looking to buy an ergonomic keyboard but I'm unable to find answers for my specific needs. I'm a programmer so I need to be able to have quick/easy access to my curly brace and bracket keys. I use vim extensively so having the ctrl and esc keys in a easier to reach location would help. I'm also a mac user (doing ruby/rails dev). With all these things in mind, what are some good options for ergonomic keyboards? I'm afraid someone will see this as "off topic" but please realize I need to ask fellow programmers. For example, I was thinking of the Kinesis Keyboard but read some reviews saying it's not good for programming. That's when I realized other programmers would be the best at answering this question.

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• What can procs and lambdas do that functions can't in ruby

  - by SecurityGate

  I've been working in Ruby for the last couple weeks, and I've come to the subject of procs, lambdas and blocks. After reading a fair share of examples from a variety of sources, I don't how they're much different from small, specialized functions. It's entirely possible that the examples I've read aren't showing the power behind procs and lambdas. def zero_function(x) x = x.to_s if x.length == 1 return x = "0" + x else return x end end zero_lambda = lambda {|x| x = x.to_s if x.length == 1 return x = "0" + x else return x end } zero_proc = Proc.new {|x| x = x.to_s if x.length == 1 puts x = "0" + x else puts x end } puts zero_function(4) puts zero_lambda.call(3) zero_proc.call(2) This function, proc, and lambda do the exact same thing, just slightly different. Is there any reason to choose one over another?

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• Migrating Ruby on Rails Website to New Server (Linux)

  - by GarytheWorm

  I have an existing website that is a Ruby on Rails project. I have another server i need to transfer the existing website too. The server i wish to transfer too was originally hosting the website so has the necessary gems/configuration are installed. I have tar the current releases shared dir from the old server and transfered them over to the new server. I have then unpack the tar in the apps directory to the new location which is a different URL path. My problem is now as you can see below that the path on the current - is pointing to the old url. ( i ran ls -la to see owenership) How can i change this current path to read with my new web address? current releases shared sitepack.tar root@server1:/var/www/clients/client1/NEWSITE.com/web/apps# ls -la current - /var/www/OLDSITE.com/web/apps/releases/20120130171636 root@server1:/var/www/clients/client1/NEWSITE.com/web/apps#

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• What to choose for beginner: PHP/Python/Ruby

  - by Nai

  I'm a beginner teaching myself to code but I would like he insight of the PSE community and helping choose where to start. My main objective is to be able to create a basic website to first test my business idea and from there iterate on it quickly to minimise my learning time. The most important criteria for me is speed. An example of speed would be pre-built components available open source and not having to write one from scratch. From my research, this seems to be a death match between the following languages and frameworks: PHP and CakePHP Python and Django Ruby and Rails Assumptions: I am going to be equally good (or bad) in all 3. It is going to be equally easy to find competent developers in either language. I know this to be false already by lets assume that it is. This question is not meant to karma whore as I've seen how passionate some of these standoff questions have been and I'll be happy to turn it into a community wiki.

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• Ruby: if statement using regexp and boolean operator [migrated]

  - by bev

  I'm learning Ruby and have failed to make a compound 'if' statement work. Here's my code (hopefully self explanatory) commentline = Regexp.new('^;;') blankline = Regexp.new('^(\s*)$') if (line !~ commentline || line !~ blankline) puts line end the variable 'line' is gotten from reading the following file: ;; alias filename backupDir Prog_i Prog_i.rb ./store Prog_ii Prog_ii.rb ./store This fails and I'm not sure why. Basically I want the comment lines and blank lines to be ignored during the processing of the lines in the file. Thanks for your help.

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• error when installing rmagic gem on Ubuntu 12.04 for Ruby on Rails

  - by PeaceDefender

  0 down vote favorite I am trying to get my Ruby on Rails application working and installing RMagic gem. But I get an error that says "Can't install RMagick 2.13.1. Can't find the ImageMagick library or one of the dependent libraries." Altough I have ImageMagick installed with its dependences. Terminal log : http://pastebin.com/vcgkbwZR I even tried to installed RMagic from Synaptic, but I get the same error when I run "bundle" command. Through my search, some people had problem with lib dependencies, but I believed I have them all installed. Another solution I found is this ( error installing RMagick from gem ) a little bit old and not sure if it is going to work for 12.04. BUT, I don't know where those configurations should go.

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• Ruby on Rails - How to migrate code from float to decimal?

  - by user1723110

  So I've got a ruby on rails code which use float a lot (lots of "to_f"). It uses a database with some numbers also stored as "float" type. I would like to migrate this code and the database to decimal only. Is it as simple as migrating the database columns to decimal (adding a decimal column, copying float column to decimal one, deleting float column, renaming decimal column to old float column name), and replacing "to_f" with "to_d" in the code? Or do I need to do more than that? Thanks a lot everyone Raphael

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• testing devise with shoulda and machinist

  - by mattherick

  hello! I´d like to test my app with shoulda and machinist. I use the devise authentification gem. I get following error: $ ruby unit/page_test.rb c:/Ruby/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/gem_dependency.rb:119:Warning: Gem::Dependency#version_requirements is deprecated and will be rem oved on or after August 2010. Use #requirement c:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:443:in load_missing_constant': uninitialized constant Admins (N ameError) from c:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:80:inconst_missing' from c:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:92:in const_missing' from c:/Users/Mattherick/Desktop/heimspiel/heimspiel_app/app/controllers/admins_controller.rb:1 from c:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:ingem_original_require' from c:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in require' from c:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:158:inrequire' from c:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:265:in require_or_load' from c:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:224:independ_on' ... 12 levels... from ./unit/../test_helper.rb:2 from c:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in gem_original_require' from c:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:inrequire' from unit/page_test.rb:1 Somebody an idea what´s wrong? If I don´t use devise my tests are okay. And my second question: Does somebdoy has a good tutorial for increasing different roles in the devise gem? If I generate my own views and add a few attributes to my devise-model, they won´t be save in the database. I read the docu at github, but don´t really checked it. mattherick

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• Rake db:migrate returns "rake aborted! no such file to load -- spec"

  - by Isaac Yerushalmi

  For some reason, out of no where, rails began giving me an error on "rake db:migrate", and I can no longer run migrations. It returns the error "no such file to load -- spec /home/ti/rails_apps/appname/Rakefile:10" I've spent two hours searching google for answers, trying to figure this out, but to no avail. What could be the problem? Here is the trace: -jailshell-3.2$ rake db:migrate --trace (in /home/ti/rails_apps/teamisrael) rake aborted! no such file to load -- spec /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require' /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in' /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require' /home/ti/rails_apps/teamisrael/vendor/plugins/google-geocoder/tasks/rspec.rake:5 /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:145:in `load_without_new_constant_marking' /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:145:in `load' /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in' /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:145:in `load' /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/tasks/rails.rb:7 /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/tasks/rails.rb:7:in `each' /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/tasks/rails.rb:7 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' /home/ti/rails_apps/teamisrael/Rakefile:10 /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:2349:in `load' /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:2349:in `raw_load_rakefile' /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1985:in `load_rakefile' /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:2036:in `standard_exception_handling' /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1984:in `load_rakefile' /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1969:in `run' /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:2036:in `standard_exception_handling' /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1967:in `run' /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/bin/rake:31 /usr/local/bin/rake:19:in `load' /usr/local/bin/rake:19

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• Windows Embedded Forums

  - by Luca Calligaris

  Here are the forums about Windows Embedded: Windows Embedded Standard Windows Embedded Compact Platform Development Windows Embedded Compact Managed Application Development Windows Embedded Compact Native Application Development The first forum has been online for some time while those about Windows Embedded Compact have been welcomed by Olivier Bloch a couple of hours ago. As I discuss in the previous post the public MS newsgroups will close between June 1, 2010 and October 1, 2010, starting from those with less traffic. The embedded NG's will be probably close at the beginning of the period since, for some reasons I do not understand, they're not so popular as those devoted to, let's say, Office. The forums will substitute the newsgroups so prepare to switch over soon!

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• When working with gems in Rails, what does 'cannot remove Object::ClassMethods' stem from?

  - by Matt

  Frequently I have run into a problem when installing gems that provides a problem like: Does anyone know what this stems from? I've seen in it several different cases, yet still haven't learned what exactly is causing it. $ sudo rake gems:install --trace (in /u/app/releases/20100213003957) ** Invoke gems:install (first_time) ** Invoke gems:base (first_time) ** Execute gems:base ** Invoke environment (first_time) ** Execute environment rake aborted! cannot remove Object::ClassMethods /u/app/releases/20100213003957/vendor/rails/activesupport/lib/active_support/dependencies.rb:603:in `remove_const' /u/app/releases/20100213003957/vendor/rails/activesupport/lib/active_support/dependencies.rb:603:in `remove_constant' /u/app/releases/20100213003957/vendor/rails/activesupport/lib/active_support/dependencies.rb:603:in `instance_eval' /u/app/releases/20100213003957/vendor/rails/activesupport/lib/active_support/dependencies.rb:603:in `remove_constant' /u/app/releases/20100213003957/vendor/rails/activesupport/lib/active_support/dependencies.rb:549:in `new_constants_in' /u/app/releases/20100213003957/vendor/rails/activesupport/lib/active_support/dependencies.rb:549:in `each' /u/app/releases/20100213003957/vendor/rails/activesupport/lib/active_support/dependencies.rb:549:in `new_constants_in' /u/app/releases/20100213003957/vendor/rails/activesupport/lib/active_support/dependencies.rb:156:in `require' /u/app/releases/20100213003957/vendor/rails/railties/lib/tasks/misc.rake:4 /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:617:in `call' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:617:in `execute' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:612:in `each' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:612:in `execute' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:578:in `invoke_with_call_chain' /usr/lib64/ruby/1.8/monitor.rb:242:in `synchronize' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:571:in `invoke_with_call_chain' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:564:in `invoke' /u/app/releases/20100213003957/vendor/rails/railties/lib/tasks/gems.rake:17 /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:617:in `call' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:617:in `execute' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:612:in `each' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:612:in `execute' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:578:in `invoke_with_call_chain' /usr/lib64/ruby/1.8/monitor.rb:242:in `synchronize' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:571:in `invoke_with_call_chain' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:588:in `invoke_prerequisites' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:585:in `each' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:585:in `invoke_prerequisites' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:577:in `invoke_with_call_chain' /usr/lib64/ruby/1.8/monitor.rb:242:in `synchronize' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:571:in `invoke_with_call_chain' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:564:in `invoke' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:2027:in `invoke_task' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:2005:in `top_level' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:2005:in `each' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:2005:in `top_level' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:2044:in `standard_exception_handling' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:1999:in `top_level' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:1977:in `run' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:2044:in `standard_exception_handling' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:1974:in `run' /usr/lib64/ruby/gems/1.8/gems/rake-0.8.4/bin/rake:31 /usr/bin/rake:19:in `load' /usr/bin/rake:19

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• Heroku Problem During Database Pull of Rails App: Mysql::Error MySQL server has gone away

  - by Rich Apodaca

  Attempting to pull my database from Heroku gives an error partway through the process (below). Using: Snow Leopard; heroku-1.8.2; taps-0.2.26; rails-2.3.5; mysql-5.1.42. Database is smallish, as you can see from the error message. Heroku tech support says it's a problem on my system, but offers nothing in the way of how to solve it. I've seen the issue reported before - for example here. How can I get around this problem? The error: $ heroku db:pull Auto-detected local database: mysql://[...]@localhost/[...]?encoding=utf8 Receiving schema Receiving data 17 tables, 9,609 records [...] /Library/Ruby/Gems/1.8/gems/sequel-3.0.0/lib/sequel/adapters/mysql.rb:166:in `query': Mysql::Error MySQL server has gone away (Sequel::DatabaseError) from /Library/Ruby/Gems/1.8/gems/sequel-3.0.0/lib/sequel/adapters/mysql.rb:166:in `_execute' from /Library/Ruby/Gems/1.8/gems/sequel-3.0.0/lib/sequel/adapters/mysql.rb:125:in `execute' from /Library/Ruby/Gems/1.8/gems/sequel-3.0.0/lib/sequel/connection_pool.rb:101:in `hold' from /Library/Ruby/Gems/1.8/gems/sequel-3.0.0/lib/sequel/database.rb:461:in `synchronize' from /Library/Ruby/Gems/1.8/gems/sequel-3.0.0/lib/sequel/adapters/mysql.rb:125:in `execute' from /Library/Ruby/Gems/1.8/gems/sequel-3.0.0/lib/sequel/database.rb:296:in `execute_dui' from /Library/Ruby/Gems/1.8/gems/sequel-3.0.0/lib/sequel/dataset.rb:276:in `execute_dui' from /Library/Ruby/Gems/1.8/gems/sequel-3.0.0/lib/sequel/adapters/mysql.rb:365:in `execute_dui' from /Library/Ruby/Gems/1.8/gems/sequel-3.0.0/lib/sequel/dataset/convenience.rb:126:in `import' from /Library/Ruby/Gems/1.8/gems/sequel-3.0.0/lib/sequel/dataset/convenience.rb:126:in `each' from /Library/Ruby/Gems/1.8/gems/sequel-3.0.0/lib/sequel/dataset/convenience.rb:126:in `import' from /Library/Ruby/Gems/1.8/gems/sequel-3.0.0/lib/sequel/adapters/mysql.rb:144:in `transaction' from /Library/Ruby/Gems/1.8/gems/sequel-3.0.0/lib/sequel/connection_pool.rb:108:in `hold' from /Library/Ruby/Gems/1.8/gems/sequel-3.0.0/lib/sequel/database.rb:461:in `synchronize' from /Library/Ruby/Gems/1.8/gems/sequel-3.0.0/lib/sequel/adapters/mysql.rb:138:in `transaction' from /Library/Ruby/Gems/1.8/gems/sequel-3.0.0/lib/sequel/dataset/convenience.rb:126:in `import' from /Library/Ruby/Gems/1.8/gems/taps-0.2.26/lib/taps/client_session.rb:211:in `cmd_receive_data' from /Library/Ruby/Gems/1.8/gems/taps-0.2.26/lib/taps/client_session.rb:203:in `loop' from /Library/Ruby/Gems/1.8/gems/taps-0.2.26/lib/taps/client_session.rb:203:in `cmd_receive_data' from /Library/Ruby/Gems/1.8/gems/taps-0.2.26/lib/taps/client_session.rb:196:in `each' from /Library/Ruby/Gems/1.8/gems/taps-0.2.26/lib/taps/client_session.rb:196:in `cmd_receive_data' from /Library/Ruby/Gems/1.8/gems/taps-0.2.26/lib/taps/client_session.rb:175:in `cmd_receive' from /Library/Ruby/Gems/1.8/gems/heroku-1.8.2/bin/../lib/heroku/commands/db.rb:17:in `pull' from /Library/Ruby/Gems/1.8/gems/heroku-1.8.2/bin/../lib/heroku/commands/db.rb:119:in `taps_client' from /Library/Ruby/Gems/1.8/gems/taps-0.2.26/lib/taps/client_session.rb:21:in `start' from /Library/Ruby/Gems/1.8/gems/heroku-1.8.2/bin/../lib/heroku/commands/db.rb:115:in `taps_client' from /Library/Ruby/Gems/1.8/gems/heroku-1.8.2/bin/../lib/heroku/commands/db.rb:16:in `pull' from /Library/Ruby/Gems/1.8/gems/heroku-1.8.2/bin/../lib/heroku/command.rb:45:in `send' from /Library/Ruby/Gems/1.8/gems/heroku-1.8.2/bin/../lib/heroku/command.rb:45:in `run_internal' from /Library/Ruby/Gems/1.8/gems/heroku-1.8.2/bin/../lib/heroku/command.rb:17:in `run' from /Library/Ruby/Gems/1.8/gems/heroku-1.8.2/bin/heroku:14 from /usr/bin/heroku:19:in `load' from /usr/bin/heroku:19

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