class ActiveRecord::Relation
Public Instance Methods
last_page()
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Calculates the last page for paginated results.
@return [Integer] Last page as a number
# File lib/yap/active_record/relation.rb, line 31 def last_page page = (total / limit_value.to_f).ceil page == 0 ? 1 : page end
range(include_total = false)
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Returns a hash defining a range with :from, :to and optionally :total. Note that querying the total count requires an extra query to be executed.
@param [Boolean] include_total Include total value @return [Hash] Values defining the range of the current page.
# File lib/yap/active_record/relation.rb, line 44 def range(include_total = false) from = offset_value + 1 to = offset_value + limit_value to = total if total < to && include_total range = { from: from, to: to } return range unless include_total range.merge(total: total) end
total()
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Returns the total number of results without pagination. This is used for generating range and last_page
values. The result for a relation is cached because count can be quite expensive.
@return [Integer] Total number of results
# File lib/yap/active_record/relation.rb, line 22 def total @total ||= without_pagination(&:count) end
without_pagination() { |rel| ... }
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Access the relation without pagination in a block. Limit and offset values are removed, filters still apply.
@return [Object] Return value of the block
# File lib/yap/active_record/relation.rb, line 8 def without_pagination rel = dup rel.limit! nil rel.offset! nil yield rel end