[Fixed]-Django: Filter foreignkey objects by default on model

by

0👍

✅

You can add a method get_families to your model Brand

class Brand(models.Model):
    title = models.CharField()

    def get_families(self):
        return self.families.filter(num_cars__gt = 0)

And then do something like this in your views. 

{% for family in brand.get_families %}
     {{ family }} {{ family.num_cars }}
{% endfor %}
👤Bipul Jain

1👍

You can achieve this kind of behavour with custom managers in Django.
https://docs.djangoproject.com/en/1.10/topics/db/managers/
for example 

class FamilyWithCarManager(models.Manager):
    def get_query_set(self):
       return super(FamilyWithCarManager, self).get_query_set().filter(num_cars__gte=0)

and then in your Family model:

class Family(models.Model):
    name = models.CharField(max_length=50)
    with_cars = FamilyWithCarManager()

then you should be able to write a query like this: 

Family.with_cars.all()
👤matyas

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