Django Rest Framework ModelSerialzer 字段不遵守 required=False

Question

使用 django rest framework 3.1.1，我有以下序列化器：

class CommentSerializer(ContentSerializer):

    created_by = UserSerializer(required=False)
    content = serializers.PrimaryKeyRelatedField(queryset=Content.objects.all(), required=False)

    class Meta:
        model = Comment

虽然 content 字段尊重 required=False 参数，但 created_by 不尊重，结果，在 UserSerializer 中给出了 "This field is required" 验证错误列表:

{"created_by":{"username":["This field is required."],"user_permissions":["This field is required."],"password":["This field is required."],"groups":["This field is required."],"profile_picture":["This field is required."]}}

根据 documentation 部分 "Dealing with nested objects" 它演示了序列化程序的用法。

我试过的：

我之前的question about this and tried adding get_validation_exclusions did not help as I believe it's already been attended in this issue.
将 created_by 更改为 created_by = serializers.PrimaryKeyRelatedField(required=False) 有效，但这不是我想要的。
在现有问题中快速搜索显示我不是唯一遇到此问题的人： https://github.com/tomchristie/django-rest-framework/issues/2719

更新：

我已经创建了几个测试用例（参见 here）但无法重现问题，看起来它只发生在 Ajax Post.

Answer 1

我在 created_by 字段中添加了 read_only=True，现在可以正常工作了。

class CommentSerializer(ContentSerializer):

    created_by = UserSerializer(required=False, read_only=True)
    content = serializers.PrimaryKeyRelatedField(queryset=Content.objects.all(), required=False)

    class Meta:
        model = Comment

Django Rest Framework ModelSerialzer 字段不遵守 required=False

Django Rest Framework ModelSerialzer field doesn't respect required=False

django

django-rest-framework