Question

Hi im using sphinx 201 beta (r2792)

i have rt index with rt_attr_uint = rake my goal is to sort results by this attribute
whitch work as expected using

$this->sphinx->SetSortMode(SPH_SORT_EXTENDED, 'rake DESC')

but i want to also randomize this result … lets say i have this data

(id,  title,  rake)
  1, 'test',  3
  2, 'test2', 3
  3, 'ásdf',  1
  4, 'rreer', 0

so after i append random

$this->sphinx->SetSortMode(SPH_SORT_EXTENDED, 'rake DESC, @random')

i would expect randomize result sorted by attribute rake descending
but im getting error:

sort-by attribute '@random' not found

whitch i dont understand because this random attribute is internal attribute
am i doing something wrong? where could be a problem? thanks

Answer 1

What I did is create the random number on the SQL query

SELECT ...  RAND() as random_sort, ...

Added it as an attribute

sql_attr_float = random_sort

And then use it in the extended sort query

$this->sphinx->SetSortMode(SPH_SORT_EXTENDED, 'rake DESC, random_sort DESC');