[patch] Backend for Xapian working in branche search-api

Patch for Xapian

New version of Xapian backend (need query.py.patch)

New version of Hit class

Done:

• Added 2 news patch for query.py and xapian.py
• In the query.py you can now just execute the ".get_object" and it will return the respective object for the result
• Changed the __repr__ of Hit class to be more readable

TODO:

• Better documentation in the code
• Put the order_by argument to work
• [Future] Remote backend functionalities?

Now I'm posting a big patch for 4 files (xapian.py, base.py, lucene.py, query.py) Done:

• Now the order_by works to Xapian
• Was need edit the Lucene, I need that someone try it, I can't

Todo:

• Put filters like "user:django" to work

Final (?) version

I've finished my work for now.

The Xapian backend are working with the following features:

• order_by
• Prefixes (like title:django)
• Support for functions instead fields (needed when you need index "caminhao" instead "caminhão")
• Return the object of a Hit when "get_object()" is called

WARNING

• The version 0.3 of xapwrap (actualy the most recent - 2006-09-14) is BUGGED for newers versions of Xapian, it uses the "set_prefix" for QueryParser? object, but the real function is "add_prefix", so you need edit the file "xapwrap/index.py" in the root of source code, go to the line 528 and change it, after (re)install the xapwrap and everything will be cool ;D
• This still untested for Lucene and Hype, so please, someone test it

Well...is it...I hope that every body enjoy ;)

Patch 4 added

Now I applied the getitem and getslice to allow easy access when used for web pages (page-based results)

Note: this patch is applied above the revision #3841