Using SQS with related data (Haystack) - indexing

Question

I having two fields for a Paragraph Model, with one of them being a ManyToMany field.
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)
And my .txt files reflects the ManyToMany relationship to index tags-
{{object.text}}
{% for tag in object.tags.all %}
{{tag.tag}}
{% endfor %}
My views.py then uses SQS to search for all the tags (I want to accomplish this first before including text field) and retrieves those. So in this case, the query is "Politics"-
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))
Edited:
and my 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()
However this doesn't retrive anything even though a few paragraphs have tags that are "Politics". Am I missing anything here or should I approach related data another way? I am a beginner with Haystack so any help will be much appreciated. Thanks in advance!

Answer 1

So this is a very useful article that helped me solve the problem.
Based on the article, this is how my search_indexes.py looks now:
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()
and my 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))
And I am using elasticsearch for the engine. Hope this helps!