Module: ColumnSort::ColumnSortHelper

Defined in:
lib/column_sort/column_sort_helper.rb

Instance Method Summary collapse

Instance Method Details

Generates a link that sorts the page based on the current params

Parameters:

  • column_symbol (Symbol) —

    The name of the sort column

  • column_name (String) (defaults to: nil) —

    Display name for the sort column, defaults to the titlezed sort column

Returns:

  • (String) —

    Link back to the current page with the new sorting parameters



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# File 'lib/column_sort/column_sort_helper.rb', line 26

def column_sort_link(column_symbol, column_name = nil)
  # default column name to column symbol titleized
  column_name = column_symbol.to_s.titleize if column_name.nil?

  # set default link attributes
  # note that we default to ascending search
  link_attributes = params.merge({
    :column_sort => { 
      :column => column_symbol, 
      :direction => "asc" 
    }
  })

  # start building the link text
  link_text = column_name
  if params[:column_sort].present?
    if params[:column_sort][:column].to_s == column_symbol.to_s
      # if sorting on the current column, add an arrow for the current direction and make the link sort in the opposite direction
      if params[:column_sort][:direction].to_s == "desc"
        link_text += '▼' # ▼
        link_attributes[:column_sort][:direction] = "asc"
      else
        link_text += '▲' # ▲
        link_attributes[:column_sort][:direction] = "desc"
      end 
    else
      # if not sorting on the current column, add a diamond and use the default sort direction
      link_text += ' ♦' # ♦
    end 
  else
    # if no sort is specified, add a diamond and use the default sort direction
    link_text += ' ♦' # ♦
  end 
  # return html string for an a tag with the correct request parameters
  link_to link_text.html_safe, link_attributes 
end

#set_default_column_sort(column, direction) ⇒ Object

Sets the default column sort for the view Updates the params directly

Parameters:

  • column (String or Symbol) —

    The name of the sort column

  • column (String or Symbol) —

    The direction of the sort



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# File 'lib/column_sort/column_sort_helper.rb', line 9

def set_default_column_sort(column, direction)
  if params.present?
    if params[:column_sort].nil?
      params[:column_sort] = { 
        :column => column,
        :direction => direction
      }   
    end 
  end 
end