Django过滤相关字段

Question

I have the following structure:

class FlowerSpecies(models.Model):
  pass

class Months(models.Model):
  flower_species = models.ForeignKey(FlowerSpecies)
  month_idx = models.IntegerField()

In words, I have a bunch of flower species each of which can grow in certain months only.

How can I now use filter to query for all the species that grow in June for example?

thanks for help!

Answer 1

Should be able to do that with

FlowerSpecies.objects.filter(months__month_idx=6) #single month
FlowerSpecies.objects.filter(months__month_idx__in=(1,2,3)) #multiple months

See Django Making Queries documentation page for details

Answer 2

FlowerSpecies.objects.filter(months__month_idx=6)

阅读查询文档 ，这些内容都有详细记录。