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PO
 

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    <p>In your lib folder add a file with the follwing content:</p> <pre><code>class Class def thread_local_accessor name, options = {} m = Module.new m.module_eval do class_variable_set :"@@#{name}", Hash.new {|h,k| h[k] = options[:default] } end m.module_eval %{ FINALIZER = lambda {|id| @@#{name}.delete id } def #{name} @@#{name}[Thread.current.object_id] end def #{name}=(val) ObjectSpace.define_finalizer Thread.current, FINALIZER unless @@#{name}.has_key? Thread.current.object_id @@#{name}[Thread.current.object_id] = val end } class_eval do include m extend m end end end </code></pre> <p>I found this <a href="http://coderrr.wordpress.com/2008/04/10/lets-stop-polluting-the-threadcurrent-hash/" rel="nofollow noreferrer">here</a></p> <p>Then add code in the controller like this:</p> <pre><code>class ApplicationController &lt; ActionController before_filter :set_subdomain private def set_subdomain User.subdomain = request.subdomains[0] end end </code></pre> <p>And now you can do the following in your user model (assuming your company model has a method called subdomain:</p> <pre><code>class User &lt; ActiveRecord::Base thread_local_accessor :subdomain, :default =&gt; nil def self.find_by_email_within_company(email) self.find_by_email(email) company_subdomains = user.brands.map(&amp;:company).map(&amp;:subdomain) company_subdomains.include?(self.subdomain) &amp;&amp; user end end </code></pre> <p>And FYI:</p> <pre><code>companies = user.brands.map(&amp;:company).map(&amp;:subdomain) </code></pre> <p>is the same as</p> <pre><code>companies = [] user.brands.each do |b| companies &lt;&lt; b.company.subdomain end </code></pre>
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    1. PORails Authlogic authentication method
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    1. COThanks for the .map($:) trick as well, I'll be able to use that all over, could you explain that? Or just slap a link in here I can read up on it at..?
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    2. COhttp://ruby-doc.org/core/classes/Array.html#M002189 .map(&:method_name) is the short form for .map{|o| o.method_name } I'm not sure if this is Ruby, or if it is a part of the Rails Core Extensions. So I don't know if it works in plain Ruby
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    3. COGreat, thanks! - I will accept your solution towards the end of the Bounty to give others the chance to respond as well, as I cant change it once I've accepted.
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