TypeError: Object of type Folder is not JSON serializable in Django Rest framework-CodePudding

I am using a property decorator for a field and have put that field into the serializer meta class but keeps getting that error. I am not sure what is the issue.

My models:

class Example(models.Model):

    creator = models.ForeignKey(
        User,
        on_delete=models.CASCADE,
        null=True,
        related_name="example"
    )


@property
def example_packages(self):
    return self.package.all()



class Package(models.Model):

    parent = models.ForeignKey(
                                Example,
                                on_delete=models.CASCADE,
                                null= True,
                                related_name="package"
    )

    name = models.CharField(max_length=25,blank=True)

My serializers:

class ExampleSerializer(serializers.ModelSerializer):

    
    class Meta:
        model = Example
        fields = ['id','creator','example_packages']

The error that I keep geeting is that example_packages is not Json serializable.

CodePudding user response：

class PackageSerializer(serializers.ModelSerializer):
    class Meta:
        model = Package
        fields = ['id','name']

class ExampleSerializer(serializers.ModelSerializer):
    package = PackageSerializer(many=True)

    class Meta:
        model = Example
        fields = ['id','creator','package']

CodePudding user response：

If the @property needs to be in 'Example'

class Example(models.Model):

    creator = models.ForeignKey(
        User,
        on_delete=models.CASCADE,
        null=True,
        related_name="example"
    )

    @property
    def example_packages(self):
        return self.package.all()



class Package(models.Model):

    parent = models.ForeignKey(
                            Example,
                            on_delete=models.CASCADE,
                            null= True,
                            related_name="package"
    )
    name = models.CharField(max_length=25,blank=True)

The serializer should look like:

class ExampleSerializer(serializers.ModelSerializer):

    example_packages = serializers.CharField()

    class Meta:
        model = Example
        fields = ['id','creator','example_packages']