I've just finished completion of this using data that is stored in MongoDB while having my Fulltext engin in Sphinx Search. I know mongo has a votable issue for adding fulltext to a future release; however at this point they don't have it.
There are several ways of inserting your Mongo information into sphinx; however the one I've found the most luck with (and has been extremely easy) is through xmlpipe2. It took me a bit to fully understand how to use this; however this article: Sphinx xmlpipe2 in PHP has an outstanding walk through which shows (at least in PHP) how to build the document, then how to insert it into sphinx.
Essentially my config ends up looking like this:
source my_source {
type = xmlpipe
xmlpipe_command = /usr/bin/php /www/generateSphinXml.php identifierForMyTable
}
with my index then looking like this:
index my_index {
source = my_source
path = /usr/local/sphinx/var/data/my_index
docinfo = extern
min_word_len = 1
mlock = 0
morphology = stem_en
charset_type = utf-8 //<----- This is q requirement however.
enable_star = 1
html_strip = 0
min_prefix_len = 2
}
I've had excellent success with this; hopefully you can find this as useful.
