Pastable version of Moving Code from Controller to Model

<pre class='prettyprint' language='ruby'>class ProductsController &lt; ApplicationController  
  helper_method :sort_column, :sort_direction
  
  def index
    @values = ValuesOfProduct.joined_products.paginate :per_page =&gt; 20, 
                                                       :page =&gt; params[:page],
                                                       :order =&gt; (sort_column + &quot; &quot; + sort_direction),
                                                       :conditions =&gt; conditions
  end
  
  private
  
  def rooms_conditions
    [&quot;Rooms LIKE ?&quot;, &quot;%#{params[:rooms]}%&quot;] if params[:rooms].present?
  end
  
  def floor_conditions
    [&quot;Floor LIKE ?&quot;, &quot;%#{params[:floor]}%&quot;] if params[:floor].present?
  end
  
  def minimum_area_conditions
    [&quot;Area &gt;= ?&quot;, params[:min_area]] if params[:min_area].present?
  end
  
  def maximum_area_conditions
    [&quot;Area &lt;= ?&quot;, params[:max_area]] if params[:max_area].present?
  end
  
  def minimum_price_conditions
    [&quot;TotalBrutto &gt;= ?&quot;, params[:min_price]] if params[:min_price].present?
  end
  
  def maximum_price_conditions
    [&quot;TotalBrutto &lt;= ?&quot;, params[:max_price]] if params[:max_price].present?
  end
  
  def conditions
    [conditions_clauses.join(' AND '), *conditions_options]
  end

def conditions_clauses
    conditions_parts.map { |condition| condition.first }
  end

def conditions_options
    conditions_parts.map { |condition| condition[1..-1] }.flatten
  end

def conditions_parts
    private_methods(true).grep(/_conditions$/).map { |m| send(m) }.compact
  end
  
  def sort_column
    %w[Number Rooms Floor Area TotalBrutto].include?(params[:sort]) ? params[:sort] : &quot;Number&quot;
  end
  
  def sort_direction
    %w[asc desc].include?(params[:direction]) ? params[:direction] : &quot;asc&quot;
  end
end</pre>
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Pastable version of Moving Code from Controller to Model