我们可以为具有相同字段的多个模型提供一个模型序列化程序吗？Django Rest框架

Question

我有5个模型，从一个基本模型继承相同的字段。现在，对于所有这五个模型，我让5个序列化器序列化各自模型的所有字段。设置的示例如下所示

基模型

class BaseModel(models.Model):

  field 1
  field 2

**模式1**

class Model1(BaseModel):
   field 3 = models.Charfield(choices=CHOICES)

模型2

class Model 2(BaseModel)
 field 3 = models.Charfield(choices=CHOICES)

因此，field3在这两种模型中都很常见，但在它们中有不同的选择，因此被放置在不同的模型中，而不是在基本模型中。

串行化器

class SerialModel1(serializers.ModelSerializer):
    class Meta:
        model = Model1
        fields = "__all__"

class SerialModel2(serializers.ModelSerializer):
    class Meta:
        model = Model2
        fields = "__all__"

因此，正如所示，即使模型具有相同的字段，我也需要对不同的模型序列化程序使用。

问题

可以为Model1和Model2只提供一个模型序列化程序吗？如果是，请建议我怎么做。

Answer 1

You can create a generic BaseModelSerializer [drf-doc] for this:
class BaseModelSerializer(serializers.ModelSerializer):
    class Meta:
        fields = '__all__'
and then use this as base class for the serializers of the concrete models:
class SerialModel1(BaseModelSerializer):
    class Meta:
        model = Model1
class SerialModel2(BaseModelSerializer):
    class Meta:
        model = Model2
This will inherit the fields specification, and override the model, so effectively configuring a serializer for the respective model, but reusing the field specification.
You can of course extend the BaseModelSerializer with extra fields, or override fields if necessary.
Note that normally a ModelSerializer is in fact already a "generic" serializer, in the sense that it can serialize any model you specify in the Meta class. So in a way, using a BaseModelSerializer is "overengineering" a bit, but it can prevent repeating code.