Class: Amber::PageArray

Inherits:
Array
  • Object
show all
Defined in:
lib/amber/page_array.rb

Instance Method Summary collapse

Instance Method Details

#limit(num) ⇒ Object 



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# File 'lib/amber/page_array.rb', line 10

def limit(num)
  PageArray.new(self[0..(num-1)])
end

#order_by(attr, options = {}) ⇒ Object

available options:

:locale – the locale to use when comparing attributes :direction – either :asc or :desc :numeric – if true, attributes are cast as numbers before comparison



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# File 'lib/amber/page_array.rb', line 21

def order_by(attr, options={})
  locale = options[:locale] || I18n.locale
  direction = options[:direction] || :asc
  array = sort do |a,b|
    if direction == :desc
      a, b = b, a
    end
    a_prop = a.prop(locale, attr)
    b_prop = b.prop(locale, attr)
    if options[:numeric]
      a_prop = to_numeric(a_prop)
      b_prop = to_numeric(b_prop)
    end
    if a_prop.nil? && b_prop.nil?
      0
    elsif a_prop.nil?
      1
    elsif b_prop.nil?
      -1
    else
      a_prop <=> b_prop
    end
  end
  # remove pages from the results that have no value set for the attr
  array.delete_if do |page|
    page.prop(locale, attr).nil?
  end
  return PageArray.new.replace array
end

#to_numeric(anything) ⇒ Object 



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# File 'lib/amber/page_array.rb', line 51

def to_numeric(anything)
  num = BigDecimal.new(anything.to_s)
  if num.frac == 0
    num.to_i
  else
    num.to_f
  end
end