Search through multiple fields in Django

问题

I'm trying to build a search system, and I want to search by multiple fieldsname, state, city, in my django models. I wrote the below code, yet I've been unable to figure out how to go about it.

Models:

class Finhall(models.Model):
     user=models.ForeignKey(User)
     name=models.CharField(max_length=250, unique=True)
     address=models.CharField(max_length=200)
     city=models.CharField(max_length=200)
     state=models.CharField(max_length=200)

     def __unicode__(self):
         return u'%s' % (self.name)

Views.py

def hup_find(request):
    if ('q' in request.GET) and request.GET['q'].strip():
        query_string=request.GET.get('q')
        seens=Finhall.objects.filter(name__icontains=query_string)
    else:
        seens=None
    return render_to_response('find.html',{'seens':seens},context_instance=RequestContext(request))

Template:

 {% block content %}
     <body>
    <form action="" method="GET">
    <input type="text" name="q" />
    <button type="submit">search</button>
   </form>


    {% for seen in seens %}

    <p> {{seen.name}}</p>

    {% empty %}

      <p> no search </p>
    {% endfor %}

 </body>

   {% endblock %}

How can I go about this? I don't want to use haysatck due to some personal reasons.

回答1:

you can use django Q objects to do OR query,

or if you want to ANDyour queries together just use the current lookups as kwargs

seens = Finhall.objects.filter(
  name__icontains=query_string, 
  address__icontains=query_string
)

You should really consider full text search or haystack (which makes search easy) because icontains issues a %LIKE% which is not remotely scalable

回答2:

EDIT: Just noticed it is Postgres only

Apparently in django 1.10 SearchVector class was added.

Usage from the docs:

Searching against a single field is great but rather limiting. The Entry instances we’re searching belong to a Blog, which has a tagline field. To query against both fields, use a SearchVector:

>>> from django.contrib.postgres.search import SearchVector
>>> Entry.objects.annotate(
...     search=SearchVector('body_text', 'blog__tagline'),
... ).filter(search='Cheese')
[<Entry: Cheese on Toast recipes>, <Entry: Pizza Recipes>]

回答3:

To search same text in multiple fields you can use this :

from django.db.models import Q

class SearchAPI(APIView):
    def get(self, request, search_text, format=None, **kwargs):
        Model.objects.filter(Q(search_tags__contains=search_text) | Q(auto_tags__contains=search_text)

来源：https://stackoverflow.com/questions/16303735/search-through-multiple-fields-in-django

标签

python

django

django-views