Django Rest Framework“列表”对象没有属性值

Question

我有下面的代码和错误堆栈跟踪。我正在尝试访问localhost:8000/fundamentals/，但收到错误消息'list' object has no attribute 'values'错误web_1  | Traceback (most recent call last):web_1  |   File "/usr/local/lib/python3.7/site-packages/django/core/handlers/exception.py", line 47, in innerweb_1  |     response = get_response(request)web_1  |   File "/usr/local/lib/python3.7/site-packages/django/core/handlers/base.py", line 202, in _get_responseweb_1  |     response = response.render()web_1  |   File "/usr/local/lib/python3.7/site-packages/django/template/response.py", line 105, in renderweb_1  |     self.content = self.rendered_contentweb_1  |   File "/usr/local/lib/python3.7/site-packages/rest_framework/response.py", line 70, in rendered_contentweb_1  |     ret = renderer.render(self.data, accepted_media_type, context)web_1  |   File "/usr/local/lib/python3.7/site-packages/rest_framework/renderers.py", line 724, in renderweb_1  |     context = self.get_context(data, accepted_media_type, renderer_context)web_1  |   File "/usr/local/lib/python3.7/site-packages/rest_framework/renderers.py", line 655, in get_contextweb_1  |     raw_data_post_form = self.get_raw_data_form(data, view, 'POST', request)web_1  |   File "/usr/local/lib/python3.7/site-packages/rest_framework/renderers.py", line 563, in get_raw_data_formweb_1  |     data = serializer.data.copy()web_1  |   File "/usr/local/lib/python3.7/site-packages/rest_framework/serializers.py", line 562, in dataweb_1  |     ret = super().dataweb_1  |   File "/usr/local/lib/python3.7/site-packages/rest_framework/serializers.py", line 264, in dataweb_1  |     self._data = self.get_initial()web_1  |   File "/usr/local/lib/python3.7/site-packages/rest_framework/serializers.py", line 412, in get_initialweb_1  |     for field in self.fields.values()web_1  |   File "/usr/local/lib/python3.7/site-packages/rest_framework/serializers.py", line 413, in <listcomp>

Answer 1

这里的问题是与BalanceSheetSerializer. 必须fields在类中定义，Meta而不是将其定义为类变量。

class BalanceSheetSerializer(serializers.ModelSerializer):
    class Meta:
        fields = [your_fields]