Consider this schenario where I'm having pagination on a page
@recordings = Recording.order(:title).page(params[:page]).per(4)
puts params[:page]@recordings.each do |recording|
puts recording.id
end
page ----------------3------------------------
Recording Load (4.0ms) SELECT "recordings".* FROM "recordings" ORDER BY
"recordings"."title" ASC LIMIT 4 OFFSET 8
1032
952
1063
1166 <<<<<<<<<<<<<<<<<<<<<<<<<< notice
page ----------------4------------------------
Recording Load (4.3ms) SELECT "recordings".* FROM "recordings" ORDER BY
"recordings"."title" ASC LIMIT 4 OFFSET 12
1166 <<<<<<<<<<<<<<<<<<<<<<<<<< notice
1168
657
756
So record 1166 is on both pages
--------------------
how I solved it
class Uniqifyer
def self.uniqify not_uniq_field
uniq_string = not_uniq_field.to_s
# secure ordering e.g [13 , 120, 140 ] not [120, 13, 140]
prepend_str = '00000000000000'.byteslice(0...-uniq_string.length)
prepend_str + uniq_string + '_uuid_' +
UUIDTools::UUID.timestamp_create().to_s
endend
#in model:before_commit :uniqifydef uniqify
self.MY_UNIQ_STRING = Uniqifyer.unigify self.MY_NOT_UNIQ_FIELDend
# in controllerdef index
@ordered_records =
MY_MODEL.order(MY_UNIQ_STRING).page(params[:page]).per(24)end
# Notice! Rube is so cool you can directly convert a uniqifyed number like
thisnumber = MY_UNIQ_STRING.to_i
not so elegant
any suggestions are welcome
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