Rails 3 path_without_format_and_extension

Just posting it here since I did not find anything on google when searching this for our rails 2 upgrade 🙂

view_context.instance_variable_get(:@_virtual_path)

Ruby: standalone silence_warnings

Kill those warnings without having to load activesupport, just drop this wherever you need 🙂

Usage

class Foo; BAR = 1; end
silence_warnings{ Foo.const_set :BAR, 2 }

Code

  def silence_warnings
    old_verbose, $VERBOSE = $VERBOSE, nil
    yield
  ensure
    $VERBOSE = old_verbose
  end

Ruby/ActiveRecord fastest way to truncate test database

Tried a few strategies, but this seems to be the fastest:
DatabaseCleaner truncate_all: 0.8s
This: 0.2s

# fast truncation of all tables that need truncations (select is 10x faster then truncate)
# https://grosser.it/2012/07/03/rubyactiverecord-fastest-way-to-truncate-test-database/
def truncate_all_tables
  config = ActiveRecord::Base.configurations[::Rails.env]
  connection = ActiveRecord::Base.connection
  connection.disable_referential_integrity do
    connection.tables.each do |table_name|
      next if connection.select_value("SELECT count(*) FROM #{table_name}") == 0
      case config["adapter"]
      when "mysql", "mysql2", "postgresql"
        connection.execute("TRUNCATE #{table_name}")
      when "sqlite", "sqlite3"
        connection.execute("DELETE FROM #{table_name}")
        connection.execute("DELETE FROM sqlite_sequence where name='#{table_name}'")
      end
    end
    connection.execute("VACUUM") if config["adapter"] == "sqlite3"
  end
end

jQuery extension to ajax-ify selected links to stay inside a container

Make your links stay in a container, great for will_paginate / sorting headers and friends 🙂

Usage
// ajaxify all links that have “tab=my_container” in their href
$(“#my_container”).ajaxifyContainer(‘a[href*=”tab=my_container”]’)

Code

  // make selected links in a container replace the container
  // https://grosser.it/2012/06/21/jquery-pjaxcontainer-extensions
  $.fn.ajaxifyContainer = function(selector){
    selector = selector || 'a';
    var $container = $(this);
    $(selector, $container).live('click', function(){
      $container.html("Loading ...").load($(this).attr("href"));
      return false;
    });
  };

jQuery .load extension to indicate loading and errors

  // show loading animation and errors inside the container that is being replaced
  // https://grosser.it/2012/06/21/jquery-load-extension-to-indicate-loading-and-errors
  $.fn.responsiveLoad = function(url, callback){
    var loading = '';
    var $container = $(this);
    $container.html(loading).load(url, function(response, status, xhr){
      if (status == "error") {
        $container.html("Error:" + xhr.status + " " + xhr.statusText);
      } else {
        if(callback) callback(response, status, xhr);
      }
    });
  };

Michael Grosser, the Blog

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