Question

我有一个像这样的序列化器：

class DataSetColumnSerializer(serializers.ModelSerializer):
    custom_target = serializers.PrimaryKeyRelatedField(required=False)

    class Meta:
        model = dataset_models.DataSetColumn

然而：

ipdb> columns[0]
{u'display_name': u'guid', u'name': u'guid', u'data_type': u'STRING', u'custom_target': None, u'ignore': False, u'is_identifier': False, u'order': 1}
ipdb> serializer.is_valid()
False
ipdb> serializer.errors
[{'custom_target': [u'This field cannot be blank.']}, {'custom_target': [u'This field cannot be blank.']}, {'custom_target': [u'This field cannot be blank.']}, {'custom_target': [u'This field cannot be blank.']}, {'custom_target': [u'This field cannot be blank.']}, {'custom_target': [u'This field cannot be blank.']}, {'custom_target': [u'This field cannot be blank.']}, {'custom_target': [u'This field cannot be blank.']}]
ipdb> serializer.fields['custom_target'].required
False

发生了什么事？

Answer 1

来自文档：

注意：当验证应用于ModelSerializer时，两者都是序列化程序字段及其相应的模型字段必须正确验证。如果您的模型上有可选字段，请确保在模型字段上正确设置blank = True，以及设置序列化器字段上的required = False。

link to docs

serializer.is_valid（）失败但是'required = False` - Django REST Framework

1 个答案: