class Pagy::Countless
Constants
- INSTANCE_VARS_MIN
Public Class Methods
new(vars={})
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Merge and validate the options, do some simple arithmetic and set a few instance variables
# File lib/pagy/countless.rb, line 12 def initialize(vars={}) # rubocop:disable Lint/MissingSuper @vars = VARS.merge(vars.delete_if{|_,v| v.nil? || v == '' }) # default vars + cleaned vars (can be overridden) @vars[:fragment] = Pagy.deprecated_var(:anchor, @vars[:anchor], :fragment, @vars[:fragment]) if @vars[:anchor] INSTANCE_VARS_MIN.each do |k,min| # validate instance variables raise VariableError.new(self), "expected :#{k} >= #{min}; got #{@vars[k].inspect}" \ unless @vars[k] && instance_variable_set(:"@#{k}", @vars[k].to_i) >= min end @offset = @items * (@page - 1) + @outset # pagination offset + outset (initial offset) end
Public Instance Methods
finalize(fetched)
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Finalize the instance variables based on the fetched items
# File lib/pagy/countless.rb, line 24 def finalize(fetched) raise OverflowError.new(self), "page #{@page} got no items" \ if fetched.zero? && @page > 1 @pages = @last = (fetched > @items ? @page + 1 : @page) # set the @pages and @last @items = fetched if fetched < @items && fetched.positive? # adjust items for last non-empty page @from = fetched.zero? ? 0 : @offset + 1 - @outset # page begins from item @to = fetched.zero? ? 0 : @offset + @items - @outset # page ends to item @prev = (@page-1 unless @page == 1) # nil if no prev page @next = @page == @last ? (1 if @vars[:cycle]) : @page + 1 # nil if no next page, 1 if :cycle self end