In search result, chinese description is garbled

[keineahnung2345]

When I search the text "判断" in my document, it shows the following result:

I've found that's because in the following lines:

https://github.com/xelkano/redmine_xapian/blob/fedf924a377dbb89b866f645428ee9aafe9207eb/lib/redmine_xapian/xapian_search.rb#L196-L198

dochash[:sample].encoding is ASCII-8BIT, which should be UTF-8 instead. After I changed dochash[:sample].encode('UTF-8', dochash[:sample].encoding, ...) into dochash[:sample].encode('UTF-8', 'UTF-8', ...), the search result becomes normal:

But it's just a workaround, and I don't know why dochash[:sample] is detected as ASCII-8BIT encoding. Is there a better fix? Thanks.

[keineahnung2345]

I've found that in: https://github.com/xelkano/redmine_xapian/blob/fedf924a377dbb89b866f645428ee9aafe9207eb/lib/redmine_xapian/xapian_search.rb#L77-L79

query_string is UTF-8, but query.description is ASCII-8BIT, but I can't find related information in xapian's website.

[picman]