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Markaby and Rails — 2.1.x woes

2008-10-17T08:40:00Z

I really like Markaby for HTML templates. I think it’s especially good if Ruby programmers are creating and updating the views. If you have to get a designer involved (i.e. non Rubyist) maybe ERB or Haml would be better, but, otherwise it’s great, because everything is Ruby.

So, I started out trying to get Markaby working with Rails 2.1.0. With some hours of confusion as to why it didn’t work and digging into Rails and Markaby code, I came up with the following two hacks which patch up Markaby to work with changes in the Rails rendering code.

In vendor/plugins/markaby/init.rb, change

ActionView::Base::register_template_handler 'mab',  Markaby::Rails::ActionViewTemplateHandler

ActionView::Template::register_template_handler 'mab',  Markaby::Rails::ActionViewTemplateHandler

Create config/initializers/markaby_fixup.rb:

# see http://onemanswalk.com/work/2007/12/13/using-markaby-w-rails-2-0-1/
ActionView::Base
class ActionView::Base
  def string_path(string)
    string
  end
end

Markaby::Rails::ActionViewTemplateHandler
class Markaby::Rails::ActionViewTemplateHandler
  def compilable?; false; end

  def render(template)
    assigns = @action_view.instance_vars.to_h.merge(template.locals)
    builder = Markaby::Rails::Builder.new(assigns, @action_view)
    eval_args = [template.source, template.filename].compact
    builder.capture { instance_eval(*eval_args) }
  end
end

So this was working fine until I updated to Rails 2.1.1, at which time I got several errors like the following:

undefined method `/people/1320/edit_path' for #<ActionView::Base:0x3d0a090>
On line #26 of people/show.html.mab

    23:   text h(@person.maiden_name)
    24: end
    25: 
    26: link_to 'Edit', edit_person_path(@person)
    27: link_to 'Back', people_path

    vendor/plugins/markaby/lib/markaby/builder.rb:166:in `send'
    config/initializers/markaby_fixup.rb:26:in `method_missing'
    app/views/addresses/new.html.mab:30:in `render'
    vendor/plugins/markaby/lib/markaby/builder.rb:105:in `instance_eval'
    vendor/plugins/markaby/lib/markaby/builder.rb:105:in `capture'
    config/initializers/markaby_fixup.rb:17:in `render'
    spec/views/addresses/new.html.mab_spec.rb:18

I’ll keep digging to figure out how to fix my fix so I can continue to use Markaby, but really what I’m wondering is — am I the only one trying to us Markaby with recent versions of Rails? I found a relevant bug report or two, but no apparent action to fix them. I’m a little worried about the health of Markaby in relation to Rails.

Anyway, I’ll keep plugging and report back here if I work out anything.

Old blog entries

2008-10-14T20:45:00Z

I’ve ported my old blog entries to the new blog and filed them under ‘archive’. Hopefully moving them around won’t have confused anybody.

If you’re wondering, I didn’t use the Mephisto supplied Typo->Mephisto conversion script (see article). I just dumped the previous database, copied the Markdown text, pasted it into new articles and then back-dated them in Mephisto.

blog bootstrap — mephisto on ovh

2008-10-11T12:23:00Z

I thought, for the first entry on my new blog, I’d explain how I got it all up and running. Partly so I will have a reference in the future and partly hoping other people might find it useful.

hosting – ovh

I chose to use a dedicated server from ovh for hosting. I wanted something independent that I had control over and with some reasonable performance. Here’s the configuration I chose:

ovh config: rsp2
os distro: linux ubuntu server 8.04.1
processor: Intel Atom Dual, 2x 1.6 GHz, L2: 2x 512Ko, FSB: 533MHz, Dual-Core
RAM: 1GB
storage: 10GB (network attached via. NFS)
bandwidth: 100Mbps
throughput limit: none
1+1 IP addresses

For me the only real compromise is the network storage instead of dedicated attached disks, but the price was really attractive (€15/month) so I thought I’d see how things go. I’ve noticed that from the command line, disk operations can be kind of slow, but the main purpose of the machine is network services (web, (light) backup, admin, etc.), so I’m hoping that the remote storage won’t be a problem.

I ordered the server on-line on the 7th and it was up and running yesterday (the 10th). So, about a 4 day turn-around. Everything was pretty easy except for one minor hitch – the login ID was wrong on the email they sent to let me know the server was ready. It was admin but should have been root. I guess the other thing that annoyed me slightly was how bear the distro was. I ended up having to install quite a few packages to get a really basic set-up running, but I guess I can’t really disagree with the decision to keep the dristro lean, otherwise you’d potentially end up with a bunch of stuff you don’t need cluttering things up.

blog engine – mephisto

I do a lot of work with Ruby on Rails so I wanted to use, if possible, a blog engine based on Rails. I’ve tried Typo (quite a while ago), and figured I’d play with the new kid on the block and see if he’s any more fun.

Rails deployment

First I had to set up some way to serve up Ruby on Rails. I chose to use Passenger (mod_rails) with Apache’s httpd server. I’ll just create a big list of steps here to give you an idea what I had to do. If you’ve got questions let me know:

apache

12	sudo apt-get install apache2sudo apt-get install apache2-threaded-dev

ruby

sudo apt-get ruby-full
sudo apt-get ruby-pkg-tools
# ruby gems -- I chose to install from source to allow ruby gems to update itself
cd ~/src
wget 'http://rubyforge.org/frs/?group_id=126'
cd ~/src/rubygems-1.3.0`
sudo ruby setup.rb # see http://www.rubygems.org/read/chapter/3

rails

sudo gem install rails`

passenger

123	sudo gem install passengersudo passenger-install-apache2-modulesudo vi /etc/apache2/mods-available/passenger.conf

123	LoadModule passenger_module /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/ext/apache2/mod_passenger.soPassengerRoot /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3PassengerRuby /usr/bin/ruby1.8

45	ln -s /etc/apache/mods-available/passenger.conf /etc/apache/mods-enabledsudo vi /etc/apache/sites-available/default

. . . 
DocumentRoot /var/www/mephisto/current/public/
<Directory /var/www/mephisto/current/public/>
            Options Indexes FollowSymLinks MultiViews
            AllowOverride None
            Order allow,deny
            allow from all
</Directory>
. . .

mephisto

Setting up mephisto was a little more work than I would have liked. Two things made it complicated:

the TZ environment variable needs to be set and that’s not strait forward for mod_rails. There’s a hack that works, but it’s a bit messy.
the stable version (at the time of writing this) for mephisto is 0.8 which requires rails version 2.0.2 (i.e. mephisto won’t work with newer versions), so I had to freeze mephisto to the 2.0.2 version of rails.

Here’s detailed list of steps I took to get mephisto setup.

sudo gem install tzinfo
wget http://github.com/technoweenie/mephisto/tarball/master.tar.gz
cd /var/www
mkdir mephesto
cd methisto
tar xzf ~/src/technoweenie-mephisto-22dab17c881f9db136194243844d8ace37536099.tar.gz
mv technoweenie-mephisto-22dab17c881f9db136194243844d8ace37536099 v0.8
ln -s v0.8 current
mkdir shared ; mkdir shared/log; mkdir shared/db
cd current
sudo su www-data -c 'rake rails:freeze:edge RELEASE=2.0.2'
vi config/database.yml

123	production: adapter: sqlite3 dbfile: /var/www/mephisto/shared/db/production.sqlite3

1314	rm log; ln -s ../shared/log .rake db:bootstrap

hack to set `TZ` environment variable that mephisto needs

12	sudo mkdir /etc/apache2/passengersudo vi /etc/apache2/passenger/envronment

TZ=UTC

sudo vi /etc/apache2/passenger/ruby_with_env

123	#!/bin/bash` . $(dirname $0)/environment` /usr/bin/ruby $*

sudo vi /etc/apache2/mods-available/passenger.conf

LoadModule passenger_module /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/ext/apache2/mod_passenger.so
PassengerRoot /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3
#PassengerRuby /usr/bin/ruby1.8
PassengerRuby /etc/apache2/passenger/ruby_with_env