我在Django rest框架中有一个问题。由于我正在学习如何使用一些高级选项,因此我不太了解。每次将外键插入表中时,我目前都需要更改一个布尔字段。 我该如何在模型中做到这一点?
型号:
class Persona(models.Model):
name = models.CharField(max_length=32)
cart = models.ForeignKey(Credit,null=True)
rg = models.IntergerField()
end = models.CharField(max_length=256)
details = models.TextField(blank=True, null=True)
order = models.ForeignKey(Order, null=True)
def __str__(self):
return self.cart
class Meta:
db_table='person'
app_label = 'bank'
class Credit(models.Model):
number = models.CharField(max_length=16, unique=True)
create_at = models.DateField(auto_add_now=True)
updated_at = models.DateField()
available = models.BooleanField()
def __str__(self):
return self.number
class Meta:
db_table = 'credit'
app_label = 'bank'
序列化器:
class PersonaSerializer(serializers.ModelSerializer):
order__id = serializers.ReadOnlyField(source='order.id')
class Meta:
model = Persona
fields = '__all__'
class Persona(viewsets.ModelViewSet):
allowed_methods = ('GET', 'POST', 'PUT', 'PATCH')
queryset = Persona.objects.all()
serializer_class = PersonaSerializer
答案 0 :(得分:1)
您可以在create
上覆盖ModelSerializer
方法以实现此目的:
def create(self, validated_data):
cart = validated_data['cart']
persona = super(PersonaSerializer, self).create(validated_data)
cart.available = True # update boolean
cart.save()
return persona
您可以在docs
中了解更多信息如果要在模型中处理此问题,可以覆盖Persona模型save
方法:
class Persona(models.Model):
name = models.CharField(max_length=32)
cart = models.ForeignKey(Credit,null=True)
rg = models.IntergerField()
end = models.CharField(max_length=256)
details = models.TextField(blank=True, null=True)
order = models.ForeignKey(Order, null=True)
def __str__(self):
return self.cart
class Meta:
db_table='person'
app_label = 'bank'
def save(self, *args, **kwargs):
# Will only update the available field when the Persona
# instance is created and the cart field is not null
if not self.pk and self.cart:
self.cart.available = True
self.cart.save()
return super(Persona, self).save(*args, **kwargs)