使用SQS和相关数据(Haystack)

时间:2013-03-12 01:00:00

标签: indexing many-to-many django-haystack

我有一个段落模型的两个字段,其中一个是ManyToMany字段。

class Tag(models.Model):
    tag = models.CharField(max_length=500)
    def __unicode__(self):
        return self.tag
admin.site.register(Tag)

class Paragraph(models.Model):
    article = models.ForeignKey(Article)
    text = models.TextField()
    tags = models.ManyToManyField(Tag)
    def __unicode__(self):
        return "Headline: " + self.article.headline + " Tags: " +  ', '.join([t.tag for t in self.tags.all()])
admin.site.register(Paragraph)

我的.txt文件反映了与索引标签的ManyToMany关系 -

{{object.text}}
{% for tag in object.tags.all %}
{{tag.tag}}
{% endfor %}

我的views.py然后使用SQS搜索所有标记(我想在包含文本字段之前先完成此操作)并检索它们。所以在这种情况下,查询是“政治” -

def politics(request):
    paragraphs = []
    sqs = SearchQuerySet().filter(tag="Politics")
    paragraphs = [a.object for a in sqs[0:10]]
    return render_to_response("search/home_politics.html",{"paragraphs":paragraphs},context_instance=RequestContext(request))

编辑: 和我的search_indexes.py

class ParagraphIndex(indexes.SearchIndex, indexes.Indexable):
    text= indexes.CharField(document=True, use_template=True)
    tags= indexes.CharField(model_attr='tags')
    def get_model(self):
        return Paragraph
    def index_queryset(self):
        return self.get_model().objects
    def load_all_queryset(self):
        # Pull all objects related to the Paragraph in search results.                                                                                                                    
        return Paragraph.objects.all().select_related()

然而,即使一些段落的标签是“政治”,这也不会反复。我在这里遗漏了什么或者我应该以另一种方式处理相关数据吗?我是Haystack的初学者,所以任何帮助都会非常感激。提前致谢!

1 个答案:

答案 0 :(得分:3)

所以这是一个非常useful article帮助我解决问题。

根据这篇文章,这就是我的search_indexes.py现在的样子:

class ParagraphIndex(indexes.SearchIndex, indexes.Indexable):
    text = indexes.CharField(document=True, use_template=True)
    tags = indexes.MultiValueField()

    def prepare_tags(self,object):
        return [tag.tag for tag in object.tags.all()]

    def get_model(self):
        return Paragraph

    def index_queryset(self):
        return self.get_model().objects

    def load_all_queryset(self):
        # Pull all objects related to Paragraph in search results.                                                                                  
        return Paragraph.objects.all().select_related()

和我的views.py:

def politics(request):
    paragraphs = []
    sqs = SearchQuerySet().filter(tags='Politics')
    paragraphs = [a.object for a in sqs[0:10]]
    return render_to_response("search/home.html",
            {"paragraphs":paragraphs},
            context_instance=RequestContext(request))

我正在使用弹性搜索引擎。希望这有帮助!