Setting Up Ubuntu 9.10 for Ruby On Rails Development

February 1st, 2010 by

This is a document I put together at the beginning of 2010 while building yet another Ubuntu VM, digging through our internal documentation to try and find out what I needed. We’ve got the answers, and generally Ruby, Rails, and Ubuntu are pretty good about telling you how to install tools if you don’t have them yet.

But the answers are spread out and distributed randomly. Plus, I can only see “The program ‘______’ is currently not installed. You can install it by typing: sudo apt-get install ______” so many times before I lose interest and put off the task.

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Posted in Adam Bachman, Configuration, Linux, MySQL, Passenger, Programming, Ruby, Ruby Enterprise Edition, Ruby on Rails, ubuntu | 4 Comments »

Rails 2.1 broke my mysql foreign keys!

June 24th, 2008 by

Rails 2.1 introduced in the MySQL Adapter “smart integer columns.” The idea was to use the :limit option to determine whether a smallint, int, or bigint should be used. This is something that the Postgres adapter had already previously implemented. The relevant code in activerecord/lib/active_record/connection_adapters/mysql_adapter.rb is:

  # Maps logical Rails types to MySQL-specific data types.
  def type_to_sql(type, limit = nil, precision = nil, scale = nil)
    return super unless type.to_s == 'integer'
 
    case limit
    when 0..3
      "smallint(#{limit})"
    when 4..8
      "int(#{limit})"
    when 9..20
      "bigint(#{limit})"
    else
      'int(11)'
    end
  end

Mirko Froehlich suggests monkey patching this function. Timothy Jones blogged about it.

To monkey-patch this, just drop a file (fix_mysql_adapter.rb) into your initializers/ directory, as such:

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Posted in ActiveRecord, John Trupiano, MySQL, Ruby on Rails | 4 Comments »

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