对模型中的多个字段执行全文搜索(Django 2.1)

from django.contrib.postgres.search import SearchVectorField

class MyModel(models.Model):
    title = models.CharField(max_length=100)
    content = models.TextField()
    search_vector = SearchVectorField(null=True)

from django.db.models.signals import pre_save
from django.dispatch import receiver
from django.contrib.postgres.search import SearchVector

@receiver(pre_save, sender=MyModel)
def update_search_vector(sender, instance, **kwargs):
    instance.search_vector = SearchVector('title', 'content')

from django.contrib.postgres.search import SearchQuery, SearchRank
from django.db.models import F

def search(request):
    query = request.GET.get('query', '')
    results = MyModel.objects.annotate(rank=SearchRank(F('search_vector'), SearchQuery(query))).order_by('-rank')
    # 处理搜索结果
    return render(request, 'search.html', {'results': results})