Pastable version of DRY up a controller action

<pre class='prettyprint' language='ruby'># GET /neighbourhoods/map_filter
def map_filter
  @map_filter_errors  = nil # Stores errors related to a filter request.
  @properties         = nil # Stores the properties that match the filter constraints.

# Extract the &quot;accessible&quot; attributes from the params.
  property_filter_attributes = AccessibleModelAttributes.extract PropertyFilter, params

filtered_properties = PropertyFilter.new(property_filter_attributes).properties

# If properties were returned.
  if filtered_properties[:properties]
    @properties = filtered_properties[:properties]

@property_data = render_to_string(
      :partial  =&gt; 'properties/map_properties_table',
      :locals   =&gt; {:properties =&gt; @properties}
      )

@number_of_properties_found_sentence = render_to_string :partial =&gt; 'properties/number_of_properties_found'
  else
    @map_filter_errors = filtered_properties[:errors]
  end
end</pre>
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Pastable version of DRY up a controller action