JZ * LABS - the web experiment playground of jason ting » Merb http://www.jzlabs.com the web experiment playground of jason ting Mon, 21 Nov 2011 04:15:38 +0000 http://wordpress.org/?v=2.9.2 en hourly 1 :layout => false http://www.jzlabs.com/2008/11/27/layout-false/ http://www.jzlabs.com/2008/11/27/layout-false/#comments Thu, 27 Nov 2008 23:51:09 +0000 Jason http://www.jzlabs.com/?p=83 I ran into a strange behavior when trying to use setInterval in JS to make an AJAX request every n seconds.  I had the timer in the $(document).ready(function() { } in the head of my application layout file.

There would be strange behavior with the timer--every interval would be twice as fast as the previous, and the browser would quickly become unresponsive and crash.

I initially thought it was a Firefox bug so I wasted sometime googling setInterval but it turns out the AJAX request was rendering the view with the layout, thus creating another timer on each request.  Stupid.

Setting :layout => false on the offending action made everything play nice.  Moral of the story: don't forget to exclude your layouts for AJAX actions.

]]> http://www.jzlabs.com/2008/11/27/layout-false/feed/ 0 Merb rake tasks http://www.jzlabs.com/2008/11/27/merb-rake-tasks/ http://www.jzlabs.com/2008/11/27/merb-rake-tasks/#comments Thu, 27 Nov 2008 23:00:16 +0000 Jason http://www.jzlabs.com/?p=70 When trying to run a merb rake task I wrote, I ran across this error:

rake aborted!
Don't know how to build task 'environment'

It turns out that merb uses a different environment variable than Rails,  so instead of :environment use :merb_env instead:

task :whatever => :merb_env do

]]> http://www.jzlabs.com/2008/11/27/merb-rake-tasks/feed/ 0 merb and Twitter made easy with Twitter4R http://www.jzlabs.com/2008/11/26/merb-and-twitter-made-easy-with-twitter4r/ http://www.jzlabs.com/2008/11/26/merb-and-twitter-made-easy-with-twitter4r/#comments Wed, 26 Nov 2008 23:34:12 +0000 Jason http://www.jzlabs.com/?p=77 Updating twitter with merb is super easy with Twitter4R:

sudo gem install twitter4r

in config/dependencies.rb:

gem "twitter4r"
require 'twitter'

(just doing dependency "twitter4r" didn't work)

in your controller:

client = Twitter::Client.new(:login => 'username', :password => 'password')
status = client.status(:post, "hello world")

]]> http://www.jzlabs.com/2008/11/26/merb-and-twitter-made-easy-with-twitter4r/feed/ 0 Strange errors when upgrading merb http://www.jzlabs.com/2008/11/26/strange-errors-when-upgrading-merb/ http://www.jzlabs.com/2008/11/26/strange-errors-when-upgrading-merb/#comments Wed, 26 Nov 2008 23:31:32 +0000 Jason http://www.jzlabs.com/?p=75 I had some strange errors when upgrading to the latest version of merb (1.1.3).  When trying to run

rake db:automigrate

I would get something like:

~ Connecting to database...
/opt/local/lib/ruby/gems/1.8/gems/dm-core-0.9.6/lib/dm-core/adapters/data_objects_adapter.rb:137:in `initialize': wrong number of arguments (8 for 1) (ArgumentError)
from /opt/local/lib/ruby/gems/1.8/gems/dm-core-0.9.6/lib/dm-core/adapters/data_objects_adapter.rb:137:in `new'
from /opt/local/lib/ruby/gems/1.8/gems/dm-core-0.9.6/lib/dm-core/adapters/data_objects_adapter.rb:137:in `normalize_uri'
from /opt/local/lib/ruby/gems/1.8/gems/dm-core-0.9.6/lib/dm-core/adapters/abstract_adapter.rb:44:in `initialize'
from /opt/local/lib/ruby/gems/1.8/gems/dm-core-0.9.6/lib/dm-core/adapters/data_objects_adapter.rb:159:in `initialize'
from /opt/local/lib/ruby/gems/1.8/gems/dm-core-0.9.6/lib/dm-core.rb:157:in `new'
from /opt/local/lib/ruby/gems/1.8/gems/dm-core-0.9.6/lib/dm-core.rb:157:in `setup'
from /opt/local/lib/ruby/gems/1.8/gems/merb_datamapper-1.0/lib/merb/orms/data_mapper/connection.rb:44:in `setup_connections'
from /opt/local/lib/ruby/gems/1.8/gems/merb_datamapper-1.0/lib/merb/orms/data_mapper/connection.rb:27:in `connect'
from /opt/local/lib/ruby/gems/1.8/gems/merb_datamapper-1.0/lib/merb_datamapper.rb:17:in `run'
from /opt/local/lib/ruby/gems/1.8/gems/merb-core-1.0/lib/merb-core/bootloader.rb:99:in `run'
from /opt/local/lib/ruby/gems/1.8/gems/merb-core-1.0/lib/merb-core/server.rb:172:in `bootup'
from /opt/local/lib/ruby/gems/1.8/gems/merb-core-1.0/lib/merb-core/server.rb:42:in `start'
from /opt/local/lib/ruby/gems/1.8/gems/merb-core-1.0/lib/merb-core.rb:169:in `start'
from /opt/local/lib/ruby/gems/1.8/gems/merb-core-1.0/bin/merb:11
from /opt/local/bin/merb:19:in `load'
from /opt/local/bin/merb:19

After googling for awhile I found this post that suggested downgrading the addressable gem back to 1.0.4.  I tried doing that but stuff was still acting funky, it would say

FATAL: The gem dm-core (= 0.9.7, runtime), [] was not found

even though it was still there.  For some reason, doing sudo gem uninstall merb didn't clean up all the merb+other dependencies, so I had to start of clean by removing merb and all its dependencies:

sudo gem uninstall addressable data_objects datamapper dm-aggregates dm-migrations dm-sweatshop dm-timestamps dm-types dm-validations do_mysql do_sqlite3 merb-action-args merb-assets merb-auth merb-auth-core merb-auth-more merb-auth-slice-password merb-cache merb-core merb-exceptions merb-gen merb-haml merb-helpers merb-mailer merb-more merb-param-protection merb-slices merb_datamapper

After installing one more time, everything worked fine and dandy.  Sheesh, why can 'sudo gem update merb' play nice out of the box?

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