Module: SimplyCouch::Model::PaginationOptions

Included in:
ClassMethods, FindBy, Finders
Defined in:
lib/simply_couch/model/pagination_options.rb

Instance Method Summary collapse

Instance Method Details

#with_pagination_options(options, &block) ⇒ Object 



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# File 'lib/simply_couch/model/pagination_options.rb', line 4

def with_pagination_options(options, &block)
  # Allow for manual setting of total_entries
  # If none given, default fallback will be total_rows
  # This is not true for a paginated find_all_by construction
  total_entries = options.delete(:total_entries)
  # Add limit and skip to options if requested
  if ([:page, :per_page] & options.keys).any? # Pagination active
    page = [options.delete(:page).to_i, 1].max
    per_page = options.delete(:per_page).to_i # Can be string
    per_page = 22 unless per_page > 0 # Nill will be 0
    options[:limit] = per_page
    options[:skip] = (page - 1) * options[:limit]
  elsif options[:offset] && options[:limit] # Sql syntax support
    options[:skip] = options.delete(:offset)
    options.delete(:order)
    page = (options[:skip].to_i / options[:limit].to_i).floor.succ
    per_page = options[:limit]
  else
    page = 1
    per_page = 22
  end
  result = block.call(options)
  if result
    result.instance_eval <<-PAGINATION, __FILE__, __LINE__
      unless respond_to?(:total_rows)
        def total_rows
          1
        end
      end
      def total_entries
        #{total_entries || 'total_rows'}
      end
      alias total_count total_entries

      def #{current_page_method}
        #{page}
      end
      def #{num_pages_method}
        return 1 if total_entries.zero?
        (total_entries.to_f / #{per_page}).ceil
      end
      alias :#{total_pages_method} :#{num_pages_method}
      def #{per_page_method}
        #{per_page}
      end
    PAGINATION
  end
  result
end