JSONField仅检查字段是否包含正确的JSON结构.您需要执行此操作，并检查此JSON中的值.

JSONField just checks that a field contains correct JSON structure. You need to do it plus check values from this JSON.

有几种方法可以做到:

1. 您可以编写自己的自定义字段类型(如果您打算在其他序列化程序中执行类似的操作，那将是很好的选择)；

2. 您可以更改字段验证(尝试类似的方法):

1. You can write your own custom field type (it's nice if you are planning to do something similar in other serializers);

2. You can change field validation (try something like this):

from rest_framework import serializers

class TestSerializer(serializers.Serializer)::
    test_field_a = serializers.JSONField(label='test_field_a', allow_null=False, required=True)
    test_field_b = serializers.JSONField(label='test_field_b', required=True)

    def validate_test_field_a(self, value):
        """
        Check that test_field_a .
        """
        if not isinstance(value.get('test_field_c'), int):
           raise serializers.ValidationError("Some error message")
       return value

from rest_framework import serializers


class Test1Serializer(serializers.Serializer):
    test_field_c = serializers.IntegerField(label='test_field_c')


class TestSerializer(serializers.Serializer):
    test_field_a = Test1Serializer()
    test_field_b = serializers.JSONField(label='test_field_b', required=True)