Whoosh-访问search_page结果项会引发ReaderClosed异常

Question

以下是简单的分页功能。

from whoosh import index
def _search(q):
    wix = index.open_dir(settings.WHOOSH_INDEX_DIR)
    term = Term("title", q) | Term("content", q)
    page_id = 1

    with wix.searcher() as s:
        return s.search_page(term, page_id, pagelen=settings.ITEMS_PER_PAGE)

In [15]: p = _search("like")

In [16]: p.results[0].reader.is_closed
Out[16]: True

如果尝试访问Hit的属性，则会收到ReaderClosed异常。

In [19]: p.results
Out[19]: <Top 10 Results for Or([Term('title', 'like'), Term('content', 'like')]) runtime=0.0214910507202>

[21]: p.results[0]["title"]
---------------------------------------------------------------------------
ReaderClosed                              Traceback (most recent call last)
/usr/local/lib/python2.7/dist-packages/Django-1.5.3-py2.7.egg/django/core/management/commands/shell.p yc in <module>()
----> 1 p.results[0]["title"]

/usr/local/lib/python2.7/dist-packages/whoosh/searching.pyc in __getitem__(self, fieldname)
1500 
1501     def __getitem__(self, fieldname):
-> 1502         if fieldname in self.fields():
1503             return self._fields[fieldname]
1504 

/usr/local/lib/python2.7/dist-packages/whoosh/searching.pyc in fields(self)
1388 
1389         if self._fields is None:
-> 1390             self._fields = self.searcher.stored_fields(self.docnum)
1391         return self._fields
1392 

/usr/local/lib/python2.7/dist-packages/whoosh/reading.pyc in stored_fields(self, docnum)
1197     def stored_fields(self, docnum):
1198         segmentnum, segmentdoc = self._segment_and_docnum(docnum)
-> 1199         return self.readers[segmentnum].stored_fields(segmentdoc)
1200 
1201     # Per doc methods

/usr/local/lib/python2.7/dist-packages/whoosh/reading.pyc in stored_fields(self, docnum)
    693     def stored_fields(self, docnum):
    694         if self.is_closed:
--> 695             raise ReaderClosed
    696         assert docnum >= 0
    697         schema = self.schema

ReaderClosed: 

如何访问匹配的属性？

Answer 1

浏览Whoosh的文档http://whoosh.readthedocs.org/en/latest/quickstart.html#the-searcher-object，我已经理解了这个问题。留在这里，以防任何人遇到同样的问题。

“范围”结束时，与搜索相关的任何文件描述符都将关闭。因此，似乎应将结果集复制到另一个数据结构中，例如“ with”块中的词典列表，以在该块外使用。

Answer 2

我今天遇到了同样的问题！我尝试使用复制/深复制。但是他们没有用。我尝试在with块之外定义变量。那也没有用！

如果发生这种情况，我使用记录器在终端上打印了变量，从而停止了该问题。我不明白发生了什么！