No error when trying to use native w/ Jaccard similarity

[joshdevins]

Turned native: true, and Recommendify would fail silently w/ Jaccard similarity instead of throwing some error when native extensions are failing. (if not built, I do get a proper error message: recommendify_native not found - you need to run rake build_native first)

Note that matrices are built but the final similarities hash in Redis is empty:

redis 127.0.0.1:6379[5]> hgetall recommendify:users:ccmatrix

1. "989:992"
2. "1"
3. "989:994"
4. "1"
5. "992:994"
6. "2"
7. "990:992"
8. "1"
9. "990:994"
10. "1"
11. "991:993"
12. "1"
13. "991:994"
14. "1"
15. "993:994"
16. "1"
    redis 127.0.0.1:6379[5]> hgetall recommendify:similarities
17. "989"
18. ""
19. "992"
20. ""
21. "994"
22. ""
23. "990"
24. ""
25. "991"
26. ""
27. "993"
28. ""

Some debug output added shows exit output as: item count is zero or one <-- this error should be thrown

Further debugging shows that unless you use DB 0 in Redis from Ruby, the native code will fail since it uses the default DB. Will open a new issue or fork for this.

[bloudermilk]

Getting this same error, unfortunately. Pure Ruby works fine, but native is failing silently. @joshdevins did you ever find a solution for this?

[joshdevins]

@bloudermilk No, I ended up just using the pure Ruby version which is sufficient for our needs for now. I looked into fixing this and it wouldn't be difficult, but need to pass the DB number to the native worker. To debug, it's helpful to add some more log lines in the native worker and rebuild+retest. That's how I discovered my particular problem with selecting the non-default Redis DB.

[bloudermilk]

@joshdevins Thanks for the update. I'm actually using the default Redis DB ("0" I guess) and still having issues with the native worker. Is this what you experienced?

@paulasmuth Any plans to continue supporting this lib?

[joshdevins]

@bloudermilk No, when I used the default Redis DB, there were no issues. Add some log lines in the native worker and you should see more details. Recompiling is simple from rake...