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PORails::Railtie: Trouble creating a Rails 3 gem
 

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  1. PORails::Railtie: Trouble creating a Rails 3 gem
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    <p>I could really use another set of eyes on this so I thought I would post it here. A while ago I wrote a basic ActiveRecord Extension for my own educational purposes. I've been reading about Railties lately and thought I would try to get it working with Rails 3. I thought I would package it up as a gem to get a sense of that process as well. If I skip the Railtie and just do this as a traditional monkeypatch in the initializers folder it works fine. Using a Railtie... nothing.</p> <p>From the looks of it my Railtie is never executed and therefore nothing else seems to be happening. </p> <p>Does anyone see anything wrong here?</p> <p>Any suggestions for best practices or improvements are also welcome.</p> <p>project Gemfile:</p> <pre><code>gem 'sql_explain', :path =&gt; "/home/mike/projects/sql_explain/" </code></pre> <p>gemspec:</p> <pre><code>... spec.files = %w(README.rdoc sql_explain.rb lib/sql_explain.rb lib/railtie.rb sql_explain.gemspec) ... </code></pre> <p>sql_explain.rb</p> <pre><code>require 'lib/railtie.rb' </code></pre> <p>railtie.rb</p> <pre><code>require 'active_record' require 'sql_explain' module SqlExplain class Railtie &lt; Rails::Railtie railtie_name :sql_explain initializer 'sql_explain.extend.activerecord' do if defined?(ActiveRecord) ActiveRecord::ConnectionAdapters::MysqlAdapter.include SqlExplain::AR end end end end </code></pre> <p>sql_explain.rb</p> <pre><code>module SqlExplain module AR def self.included(base_klass) base_klass.send :alias_method_chain, :select, :explain end def select_with_explain(sql, name = nil) @connection.query_with_result = true result = execute('explain ' + sql, :skip_logging) rows = [] result.each_hash { |row| rows &lt;&lt; row } result.free @connection.more_results &amp;&amp; @connection.next_result # invoking stored procedures with CLIENT_MULTI_RESULTS requires this to tidy up else connection will be dropped exp_string = "" rows.each{|row| row.each_pair{|k,v| exp_string += " #{k}: #{v} |"}} log(exp_string, "Explanation") {} select_without_explain(sql, name) end end end </code></pre>
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