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POHow to append a before_filter in gem after all other controller before_filters in a Rails3 app?
 

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  1. POHow to append a before_filter in gem after all other controller before_filters in a Rails3 app?
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    <p>There's a gem, which <strong>appends</strong> a <code>before_filter</code> to a Rails app:</p> <pre><code>class Railtie &lt; Rails::Railtie initializer "..." do ActiveSupport.on_load(:action_controller) do ActionController::Base.send(:include, Filter) ... module Filter extend ActiveSupport::Concern included do append_before_filter :set_locale end def set_locale .... </code></pre> <p>And here's some controller in the app:</p> <pre><code>class DesktopsController &lt; ApplicationController before_filter :set_language_in_session </code></pre> <p>Now the problem with this is that the <code>before_filter</code> from the gem is being put in the filter chain before the <code>before_filter</code> from the DesktopsController:</p> <pre><code>DesktopsController._process_action_callbacks.select { |c| c.kind == :before }.collect { |filter| filter.filter } =&gt; [ [0] :set_locale, [1] :set_language_in_session ] </code></pre> <p>How can I make the <code>before_filter</code> from the gem (<strong>set_locale</strong>) be put <strong>after</strong> all other filters? The secret probably lies in this line:</p> <pre><code>ActiveSupport.on_load(:action_controller) do </code></pre> <p>But I've tried different libraries without any luck...</p> <p>Btw. Here's the <a href="https://github.com/Exvo/locale_detector">full code</a> of the gem. Ruby 1.9.2, Rails 3.0.5.</p>
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