Slides: git-presentation

“This version of RMagick was created to run with ImageMagick x.x.x (not y.y.y)”

You will be happy to know you just have to uninstall and reinstall RMagick. Apparently the gem is not only specifically built to your machine but also bound to the ImageMagick that was installed at the time.

require 'rubygems'
require 'hpricot'
require 'net/http'
require 'uri'
require 'cgi' 

##
# Pivotal Tracker API Ruby Wrapper
# November 11, 2008
# Justin Smestad
# http://www.evalcode.com
##

class Tracker
  def initialize(project_id = changeme, token = changeme)
    @project_id, @token = project_id, token
  end

  def project
    resource_uri = URI.parse("http://www.pivotaltracker.com/services/v1/projects/#{@project_id}")
    response = Net::HTTP.start(resource_uri.host, resource_uri.port) do |http|
      http.get(resource_uri.path, {'Token' => @token})
    end

    doc = Hpricot(response.body).at('project')

    @project = {
      :name             => doc.at('name').innerHTML,
      :iteration_length => doc.at('iteration_length').innerHTML,
      :week_start_day   => doc.at('week_start_day').innerHTML,
      :point_scale      => doc.at('point_scale').innerHTML
    }
  end

  def stories
    resource_uri = URI.parse("http://www.pivotaltracker.com/services/v1/projects/#{@project_id}/stories")
    response = Net::HTTP.start(resource_uri.host, resource_uri.port) do |http|
      http.get(resource_uri.path, {'Token' => @token})
    end

    doc = Hpricot(response.body)

    @stories = []

    doc.search('stories > story').each do |story|
      @stories << {
        :id => story.at('id').innerHTML.to_i,
        :type => story.at('story_type').innerHTML,
        :name => story.at('name').innerHTML
       }
    end
    return @stories
  end

  # would ideally like to pass a size, aka :all to limit search
  def find(filters = {})
    uri = "http://www.pivotaltracker.com/services/v1/projects/#{@project_id}/stories"
    unless filters.empty?
      uri << "?filter="
      filters.each do |key, value|
        uri << CGI::escape("#{key}\"#{value}\""
      end
    end

    resource_uri = URI.parse(uri)
    response = Net::HTTP.start(resource_uri.host, resource_uri.port) do |http|
      http.get(resource_uri.path, {'Token' => @token})
    end

    doc = Hpricot(response.body)

    @stories = []

    doc.search('stories > story').each do |story|
      @stories << {
        :id => story.at('id').innerHTML.to_i,
        :type => story.at('story_type').innerHTML,
        :name => story.at('name').innerHTML
      }
    end
    return @stories
  end

  def find_story(id)
    resource_uri = URI.parse("http://www.pivotaltracker.com/services/v1/projects/#{@project_id}/stories/#{id}")
    response = Net::HTTP.start(resource_uri.host, resource_uri.port) do |http|
      http.get(resource_uri.path, {'Token' => @token, 'Content-Type' => 'application/xml'})
    end

    doc = Hpricot(response.body).at('story')

    @story = {
      :id => doc.at('id').innerHTML.to_i,
      :type => doc.at('story_type').innerHTML,
      :name => doc.at('name').innerHTML
    }
  end

  def create_story(story)
    story_xml = build_story_xml(story)
    resource_uri = URI.parse("http://www.pivotaltracker.com/services/v1/projects/#{@project_id}/stories")
    response = Net::HTTP.start(resource_uri.host, resource_uri.port) do |http|
      http.post(resource_uri.path, story_xml, {'Token' => @token, 'Content-Type' => 'application/xml'})
    end
  end

  def update_story(story)
    story_xml = build_story_xml(story)
    resource_uri = URI.parse("http://www.pivotaltracker.com/services/v1/projects/#{@project_id}/stories/#{story[:id]}")
    response = Net::HTTP.start(resource_uri.host, resource_uri.port) do |http|
      http.put(resource_uri.path, story_xml, {'Token' => @token, 'Content-Type' => 'application/xml'})
    end
  end

  def delete_story(story_id)
    resource_uri = URI.parse("http://www.pivotaltracker.com/services/v1/projects/#{@project_id}/stories/#{story_id}")
    response = Net::HTTP.start(resource_uri.host, resource_uri.port) do |http|
      http.delete(resource_uri.path, {'Token' => @token})
    end
  end

  private

    def build_story_xml(story)
      story_xml = "<story>"
      story.each do |key, value|
        story_xml << "<#{key}>#{value.to_s}</#{key}>"
      end
      story_xml << "</story>"
    end
end

require 'pivotal_tracker'
require 'test/unit'

class PivotalTrackerTest < Test::Unit::TestCase

def setup
@tracker = Tracker.new
end

def test_assert_stories_return
assert_equal 3, @tracker.stories.size
end

def test_assert_project_response
project = @tracker.project
assert_equal "Factory Test", project[:name]
assert_equal "1", project[:iteration_length]
end

def test_find_without_filters
result = @tracker.find
assert_equal @tracker.stories.size, result.size
end

def test_find_with_filters
result = @tracker.find :name => 'Create another one'
assert_equal result[0][:name], 'Create another one'
end

def test_assert_story_creation
current_size = @tracker.stories.size
story = {
:name => 'Create another one',
:story_type => "feature",
:requested_by => "Justin Smestad"
}
@tracker.create_story(story)
assert_equal (current_size + 1), @tracker.stories.size
end

def test_story_updates
story = {
:id => 272626,
:name => 'This has changed'
}
@tracker.update_story(story)
assert_equal @tracker.find_story(story[:id])[:name], story[:name]
end

def test_story_deletion
current_size = @tracker.stories.size
id = @tracker.stories[0][:id]
@tracker.delete_story(id)
assert_equal (current_size - 1), @tracker.stories.size
end

end

@post.comments.find(:all, :conditions => "name LIKE 'stupid%'").each {|record| record.destroy }

With a patch I recently submitted to Rails core, you can now trim this line into:

@post.comments.destroy_all "name LIKE 'stupid%'"

Jump on over to Lighthouse bugtracker and try out the patch.

variable = group_class == Animal ? 8 : 2

initially this turned into

if group_class == Animal
  variable = 8
elsif group_class == Water
  variable = 2
else
  variable = nil
end

This code was simply meant to check against class type since group_class is holding the type of this object. We decided to change this into a case statement as we could see more group_class types coming down the road in the next iteration.

variable = case group_class
               when Animal: 3
               when Water: 8
               ....

So this code was assumingly supposed to work, however does not. Apparently the valid way of writing this class is to do:

variable = case group_class.name
               when "Animal": 3
               when "Water": 8
               ....

Then this code works as designed. Tracking down the reason for this is ActiveRecord’s overloaded == and === operators.

# File activerecord/lib/active_record/base.rb, line 1269
1269:       def ===(object)
1270:         object.is_a?(self)
1271:       end
-----
# File activerecord/lib/active_record/base.rb, line 2421
2421:       def ==(comparison_object)
2422:         comparison_object.equal?(self) ||
2423:           (comparison_object.instance_of?(self.class) &&
2424:             comparison_object.id == id &&
2425:             !comparison_object.new_record?)
2426:       end

Just a quirk I noticed. Enjoy

$ cd /Applications/TextMate.app/Contents/SharedSupport/Bundles/
$ sudo git clone git://github.com/protocool/ack-tmbundle.git Ack.tmbundle

Use Ack in Project with Cmd+Shift+A

sudo a2enmod rewrite
sudo /etc/init.d/apache2 restart

After these two commands, you can stop pulling out your hair and begin shaking your fist at the sneaky passenger/mod_rails installer. Just goes to show that automated installers are not always the holy grail.