如何编写在Postgres列中查找单词的Django查询？

from django.db import models

class MyModel(models.Model):
    text = models.TextField()

from django.db.models import Q

MyModel.objects.filter(text__icontains='example')

from django.contrib.postgres.search import SearchVector
from django.db import models

class MyModel(models.Model):
    text = models.TextField()
    search_vector = SearchVector('text')

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

query = SearchQuery('example')
rank = SearchRank(F('search_vector'), query)

MyModel.objects.annotate(rank=rank).filter(rank__gte=0.3).order_by('-rank')