Django Haystack& Whoosh搜索工作，但SearchQuerySet返回0结果 [英] Django Haystack & Whoosh Search Working, But SearchQuerySet Return 0 Results

问题描述

编辑：在帖子底部的更多信息

原始问题：

我似乎有与这个（未解决的）问题相同的问题：
django-haystack + Whoosh SearchQuerySet（）。all（）always None

I seem to be having the same problem as in this (unresolved) question: django-haystack + Whoosh SearchQuerySet().all() always None

我已经在我的Django上设置了Haystack项目和所有工作正常（SearchQuerySet用于返回结果），但是在中止尝试创建一个新的自定义搜索表单（从git回滚）后，似乎索引和原始搜索页面仍然可以正常工作，但现在SearchQuerySet（）总是返回0个结果！

I've set up Haystack with Whoosh on my Django project and all was working fine at first (SearchQuerySet used to return results), but after an aborted attempt to create a new custom search form (rolled back from git) it appears that indexing and the original search page still all work fine, but now SearchQuerySet() always returns 0 results!

运行：

manage.py rebuild_index --verbosity=2

正确显示：

Indexing 14 assets
    indexed 1 - 14 of 14 (worker PID: 1234).

然后可以从原始搜索表单中正确搜索这些索引的资源。

These indexed assets can then all be correctly searched on from the original search form.

但是，打开一个Django shell并运行：

However, opening a Django shell and running:

from haystack.query import SearchQuerySet
SearchQuerySet().all().count()

始终返回 0 ！

相关点击冻结：

• Python 3.5.2


• Django 1.9.3


• django-haystack 2.5.0


• Whoosh 2.7.4

• Python 3.5.2
• Django 1.9.3
• django-haystack 2.5.0
• Whoosh 2.7.4

/myapp/search_indexes.py：

/myapp/search_indexes.py:

from haystack import indexes
from .models import Asset

class AssetIndex(indexes.SearchIndex, indexes.Indexable):
    text = indexes.NgramField(document=True, use_template=True)
    asset_description = indexes.CharField(model_attr='asset_description')
    manufacturer = indexes.CharField(model_attr='asset_manufacturer')

    def get_model(self):
        return Asset

    def no_query_found(self):
        return self.searchqueryset.exclude(content='foo')

    def index_queryset(self, using=None):
        return self.get_model().objects.all()

/myapp/templates/search/indexes/myapp/asset_text.txt：

/myapp/templates/search/indexes/myapp/asset_text.txt:

{{ object.asset_description }}
{{ object.asset_details }}
{{ object.asset_manufacturer }}
{{ object.asset_model }}
... etc.

/myapp/urls.py：

/myapp/urls.py:

urlpatterns = [
    ....
    url(r'^search/', include('haystack.urls')),
    ....
]

编辑：

所以在Haystack源代码中挖掘出来，我发现0来自哪里，但不是为什么！

So digging in the Haystack source code I've found out where the 0 is coming from, but not why!

/ myvenv / Lib / site-packages /hackstack/query.py

/myvenv/Lib/site-packages/hackstack/query.py

class SearchQuerySet(object):
    ...

    def __len__(self):
        if self._result_count is None:
            self._result_count = self.query.get_count()

        # Some backends give weird, false-y values here. Convert to zero.
        if not self._result_count:
            self._result_count = 0

    # This needs to return the actual number of hits, not what's in the cache.
    return self._result_count - self._ignored_result_count

    ....

将 0 更改为任何int使SearchQuerySet始终返回该int，但是我仍然不知道为什么 if not self._result_count 将是真的...

Changing the 0 to any int makes SearchQuerySet always return that int, but I still don't know why if not self._result_count would be true...

推荐答案

看起来这是一个已经报告的干草堆中的错误尚未解决：

It looks like this a bug in haystack that has already been reported but has yet to be addressed:

https://github.com/django-haystack/django-haystack/issues/1021

不幸的是，如果文本索引字段是Ngram或EdgeNgram SearchQuerySet（）。count（）和 SearchQuerySet（）。all（）。count（）将返回 0 除非您指定过滤器，例如 SearchQuerySet（）。all（）。exclude（content ='thisshouldnotmatchanythingintheindex'）count（）返回索引对象的总数。

Unfortunately if the "text" index field is Ngram or EdgeNgram SearchQuerySet().count() and SearchQuerySet().all().count() will return 0 unless you specify a filter, e.g. SearchQuerySet().all().exclude(content='thisshouldnotmatchanythingintheindex').count() returns the total number of indexed objects.

这篇关于Django Haystack& Whoosh搜索工作，但SearchQuerySet返回0结果的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！