Category Archives: Ruby

GitHub now enforces the User Agent. If you do API calls without user agent you will get a 403 error message back. Check out this post: http://developer.github.com/changes/2013-04-24-user-agent-required/. If you are using the HTTParty GEM in Ruby to do the API calls you have to set the headers. Here an example:

At the last DevCamp in KA I had some good discussion about the VersionEye API. That’s why I enhanced it a little bit. I just introduced a new attribute to the project dependencies. The “stable” attribute. If this is true than that means that the newest version is stable, otherwise the newest version is unstable.Continue reading “VersionEye API : Dependency stable”

This code checks if the given link exists and returns an HTTP Code 200.

Parsing is CSV file in Ruby is very easy. Check out this code: require “csv” csv_file_path = “ABSOLUTE_PATH_TO_YOUR_CSV_FILE” file = File.open(csv_file_path, “r:ISO-8859-1”) csv = CSV.parse file That’s it. This is how you get the first row: csv.first This is how you get the first column of the first row: csv.first.first And this is how youContinue reading “Parsing a CSV in Ruby”

Not for my self. How to check quickly the response code of an URL request in Ruby? Net::HTTP.get_response(URI.parse(“http://localhost:3000/my_fancy_resource.html”)).code == 200

Through the new VersionEye API you can get a list of all licenses for your software project. VersionEye now supports 7 different package managers. In this example I will use a Ruby Gemfile to demonstrate how easy it is to get the license list. First of all you need to signup at VersionEye to get yourContinue reading “How to get a list of all licenses for your Software Project”

CloudControl is a pretty cool StartUp from Berlin. It is a PaaS Solution like Heroku.  CloudControl is hosting on AWS in Ireland. They are more flexible than Heroku. Beside the number of web processes you can choose how much RAM each instance should have. This is a cool features what you don’t get on Heroku.Continue reading “Ruby on Rails + MySQL on CloudControl”

Not for me. The 3 most important Rake commands in a Ruby on Rails application are: rake db:drop rake db:create rake db:migrate First command drops the database. Second command creates the database. Third command runs all migrations and creates basically the schema. This is incredible useful.

by executing this command: rails generate rspec:install I got this error message. ~.rvm/gems/ruby-1.9.3-p194@ms/gems/activerecord-3.2.8/lib/active_record/dynamic_matchers.rb:50:in `method_missing’: undefined local variable or method `consultant_id’ for #<Class:0x007fdb93a08bd0> (NameError) the problem was that in one of the models I used :through => consultant_id As soon I resolved this option it worked. Strange!

I just tried to run “rspec” and got this error. ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require’: cannot load such file — spec_helper (LoadError) The problem was that the file “spec_helper” was not existing. a simple: rails generate rspec:install solved the problem.

I just created a rails migration for one of my tables. Wanted to change the type of a column from string to integer. My migration looked like that: Unfortunately it didn’t worked out. I got this Exception: PG::Error: ERROR: column “title_id” cannot be cast to type integer : ALTER TABLE “consultants” ALTER COLUMN “title_id” TYPEContinue reading “Rails Migration column_change”