поле требуется для вложенного сериализатором Джанго Rest

Question

Я следующую структуру:

Модели

class Customer(models.Model): 
    name = models.ForeignKey(Candidate) 
    candidate_test = models.ForeignKey(CandidateTest, null=True) 
    # Other fields 

class Candidate(models.Model): 
    first_name = models.CharField(max_length=40) 
    # Other fields 

class CandidateTest(models.Model): 
    test_id = models.ForeignKey(Test) 
    # 2 more fields with Foreign Key and null, blank both are True 

class Test(models.Model): 
    test_name = models.CharField() 
    # 2 more fields with Foreign Key and null, blank both are True 

сериализаторы

class CandidateSerializer(serializers.ModelSerializer): 
    class Meta: 
     model = Candidate 
     fields = ('first_name', # other fields) 


class TestSerializer(serializers.ModelSerializer): 
    class Meta: 
     model = Test 
     fields = ('id', 'test_name',) 


class CandidateTestSerializer(serializers.ModelSerializer): 
    test_id = TestSerializer() 

    class Meta: 
     model = CandidateTest 
     fields = ('id', 'test_id') 


class CustomerSerializer(serializers.ModelSerializer): 
    name = CandidateSerializer() 
    candidate_test = CandidateTestSerializer() 

    class Meta: 
     model = Customer 
     fields = ('id', 'name', 'candidate_test') 

Теперь, когда я представляю (POST) форму, используя Django API просмотра Open Framework. Я получаю следующую ошибку:

'list' object has no attribute 'get' 

Ниже приводится StackTrace:

Error during template rendering 

In template /srv/www/safe/shared/env/local/lib/python2.7/site-packages /rest_framework/templates/rest_framework/horizontal/fieldset.html, error at line 11 
'list' object has no attribute 'get' 
1 {% load rest_framework %} 
2 <fieldset> 
3  {% if field.label %} 
4  <div class="form-group" style="border-bottom: 1px solid #e5e5e5"> 
5   <legend class="control-label col-sm-2 {% if style.hide_label %}sr-only{% endif %}" style="border-bottom: 0"> 
6   {{ field.label }} 
7   </legend> 
8  </div> 
9  {% endif %} 
10 
11 

    {% for nested_field in field %} 



12  {% if not nested_field.read_only %} 
13  {% render_field nested_field style=style %} 
14  {% endif %} 
15 {% endfor %} 
16 </fieldset> 
17 
Traceback Switch to copy-and-paste view 

/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/core/handlers/base.py in get_response 

           response = response.render() 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/response.py in render 

          self.content = self.rendered_content 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/rest_framework/response.py in rendered_content 

         ret = renderer.render(self.data, media_type, context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/rest_framework/renderers.py in render 

         context = self.get_context(data, accepted_media_type, renderer_context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/rest_framework/renderers.py in get_context 

          'post_form': self.get_rendered_html_form(data, view, 'POST', request), 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/rest_framework/renderers.py in get_rendered_html_form 

            [('template', 'rest_framework/api_form.html')] 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/rest_framework/renderers.py in render 

         return template.render(context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/backends/django.py in render 

         return self.template.render(context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/base.py in render 

            return self._render(context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/base.py in _render 

         return self.nodelist.render(context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/base.py in render 

           bit = self.render_node(node, context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/debug.py in render_node 

          return node.render(context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/defaulttags.py in render 

              nodelist.append(node.render(context)) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/defaulttags.py in render 

           return nodelist.render(context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/base.py in render 

           bit = self.render_node(node, context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/debug.py in render_node 

          return node.render(context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/base.py in render 

            return func(*resolved_args, **resolved_kwargs) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/rest_framework/templatetags/rest_framework.py in render_field 

        return renderer.render_field(field, style) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/rest_framework/renderers.py in render_field 

         return template.render(context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/backends/django.py in render 

         return self.template.render(context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/base.py in render 

            return self._render(context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/base.py in _render 

         return self.nodelist.render(context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/base.py in render 

           bit = self.render_node(node, context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/debug.py in render_node 

          return node.render(context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/defaulttags.py in render 

              nodelist.append(node.render(context)) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/defaulttags.py in render 

           return nodelist.render(context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/base.py in render 

           bit = self.render_node(node, context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/debug.py in render_node 

          return node.render(context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/base.py in render 

            return func(*resolved_args, **resolved_kwargs) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/rest_framework/templatetags/rest_framework.py in render_field 

        return renderer.render_field(field, style) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/rest_framework/renderers.py in render_field 

         return template.render(context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/backends/django.py in render 

         return self.template.render(context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/base.py in render 

            return self._render(context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/base.py in _render 

         return self.nodelist.render(context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/base.py in render 

           bit = self.render_node(node, context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/debug.py in render_node 

          return node.render(context) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/django/template/defaulttags.py in render 

           values = list(values) 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/rest_framework/utils/serializer_helpers.py in __iter__ 

          yield self[field.field_name] 

    ... 
▶ Local vars 
/srv/www/safe/shared/env/local/lib/python2.7/site-packages/rest_framework/utils/serializer_helpers.py in __getitem__ 

         error = self.errors.get(key) if self.errors else None 

    ... 
▼ Local vars 
Variable Value 
field 

IntegerField(label='ID', read_only=True) 

self  

<NestedBoundField value={} errors=[u'This field is required.']> 

key  

'id' 

value 

None 

Также обратите внимание, что при использовании запросов его работает отлично ...

Answer 1

У вас есть опечатка в вашем CustomerSerializer сериализатором:

candidate_test = CustomerSerializer() 

должен вероятно, будет:

candidate_test = CandidateTestSerializer() 

Answer 2

Это ошибка в рамках отдыха, и она до сих пор не исправлено: https://github.com/tomchristie/django-rest-framework/issues/4073

Чтобы исправить это, единственный способ я понял, до сих пор это:

в классе, унаследованных от ModelSerializer или Serializer, переопределить __getitem__ метод:

def __getitem__(self, key): 
    field = self.fields[key] 
    value = self.data.get(key) 
    error = self.errors.get(key) if hasattr(self, '_errors') else None 
    if isinstance(field, serializers.Serializer): 
     return NestedBoundField(field, value, field.data) 
    return BoundField(field, value, error) 

было бы пройти вниз field.data вместо ошибки, может вызвать некоторые дополнительные вопросы, но до сих пор это лучше, чем прохождение вниз ошибок в виде списка (п sted serializer ожидает, что дерево ошибок будет полностью заполнено, но вместо этого оно получит родительское сообщение об ошибке)