Class: RESTFramework::ModelOrderingFilter

Inherits:
BaseFilter
  • Object
show all
Defined in:
lib/rest_framework/filters.rb

Overview

A filter backend which handles ordering of the recordset.

Instance Method Summary collapse

Methods inherited from BaseFilter

#initialize

Constructor Details

This class inherits a constructor from RESTFramework::BaseFilter

Instance Method Details

#_get_fields ⇒ Object

Get a list of ordering fields for the current action. Do not fallback to columns in case the user wants to order by a virtual column.



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# File 'lib/rest_framework/filters.rb', line 45

def _get_fields
  return @controller.class.ordering_fields || @controller.get_fields
end

#_get_ordering ⇒ Object

Convert ordering string to an ordering configuration.



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# File 'lib/rest_framework/filters.rb', line 50

def _get_ordering
  return nil if @controller.class.ordering_query_param.blank?

  # Ensure ordering_fields are strings since the split param will be strings.
  fields = self._get_fields&.map(&:to_s)
  order_string = @controller.params[@controller.class.ordering_query_param]

  if order_string.present? && fields
    ordering = {}.with_indifferent_access
    order_string.split(",").each do |field|
      if field[0] == "-"
        column = field[1..-1]
        direction = :desc
      else
        column = field
        direction = :asc
      end
      if !fields || column.in?(fields)
        ordering[column] = direction
      end
    end
    return ordering
  end

  return nil
end

#get_filtered_data(data) ⇒ Object

Order data according to the request query parameters.



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# File 'lib/rest_framework/filters.rb', line 78

def get_filtered_data(data)
  ordering = self._get_ordering
  reorder = !@controller.class.ordering_no_reorder

  if ordering && !ordering.empty?
    return data.send(reorder ? :reorder : :order, _get_ordering)
  end

  return data
end