我正在尝试将图像文件从React发送到我的Django Rest Framework，但是Django Rest似乎没有收到我的数据。
当我直接从Django REST Framework http://127.0.0.1:8001/api/paintings/photos发出POST请求时，效果很好，但是当我尝试通过反应来执行它时，则会引发POST 500错误。
我不确定这与我的内容类型有关还是其他原因。
这是我在React中的功能
createPainting = (data) => {
console.log(data)
console.log(JSON.stringify(data))
const endpoint = "/api/paintings/photos"; //notice the endpoint is going to a relative request, (relative to where the final javascript built code will be)
const csrfToken = cookie.load("csrftoken");
if (csrfToken !== undefined) {
// this goes into the options argument in fetch(url, options)
let lookupOptions = {
method: "POST",
headers: {
"Content-Type": "multipart/form-data; boundary=63c5979328c44e2c869349443a94200e",
"Process-Data": "false",
"Accept": "multipart/form-data, application/json",
"X-CSRFToken": csrfToken
},
body: JSON.stringify(data),
credentials: "include"
};
fetch(endpoint, lookupOptions)
.then(response => {
return response.json();
})
this.clearForm()
.catch(error => {
console.log("error", error);
alert("An error occured, please try again later.");
});
}
};
输入的数据如下：
{srcs: "yacht3.jpeg", title_id: "109"}
当我进行字符串化时，它看起来像这样：
{"srcs":"yacht3.jpeg","title_id":"109"}
这是完整的错误消息
Traceback (most recent call last):
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/db/backends/utils.py", line 85, in _execute
return self.cursor.execute(sql, params)
psycopg2.errors.NotNullViolation: null value in column "title_id" violates not-null constraint
DETAIL: Failing row contains (99, default.jpg, null, 1).
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/core/handlers/exception.py", line 35, in inner
response = get_response(request)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/core/handlers/base.py", line 128, in _get_response
response = self.process_exception_by_middleware(e, request)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/core/handlers/base.py", line 126, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view
return view_func(*args, **kwargs)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/views/generic/base.py", line 69, in view
return self.dispatch(request, *args, **kwargs)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/rest_framework/views.py", line 483, in dispatch
response = self.handle_exception(exc)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/rest_framework/views.py", line 443, in handle_exception
self.raise_uncaught_exception(exc)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/rest_framework/views.py", line 480, in dispatch
response = handler(request, *args, **kwargs)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/rest_framework/generics.py", line 244, in post
return self.create(request, *args, **kwargs)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/rest_framework/mixins.py", line 21, in create
self.perform_create(serializer)
File "/home/hzren/dev/t_and_b_website/src/paintings/views.py", line 132, in perform_create
serializer.save(user=self.request.user)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/rest_framework/serializers.py", line 214, in save
self.instance = self.create(validated_data)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/rest_framework/serializers.py", line 940, in create
instance = ModelClass.objects.create(**validated_data)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/db/models/manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/db/models/query.py", line 417, in create
obj.save(force_insert=True, using=self.db)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/db/models/base.py", line 729, in save
force_update=force_update, update_fields=update_fields)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/db/models/base.py", line 759, in save_base
updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/db/models/base.py", line 842, in _save_table
result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/db/models/base.py", line 880, in _do_insert
using=using, raw=raw)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/db/models/manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/db/models/query.py", line 1125, in _insert
return query.get_compiler(using=using).execute_sql(return_id)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 1285, in execute_sql
cursor.execute(sql, params)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/db/backends/utils.py", line 100, in execute
return super().execute(sql, params)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/db/backends/utils.py", line 68, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/db/backends/utils.py", line 77, in _execute_with_wrappers
return executor(sql, params, many, context)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/db/backends/utils.py", line 85, in _execute
return self.cursor.execute(sql, params)
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/db/utils.py", line 89, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/home/hzren/dev/t_and_b_website/venv/lib/python3.6/site-packages/django/db/backends/utils.py", line 85, in _execute
return self.cursor.execute(sql, params)
django.db.utils.IntegrityError: null value in column "title_id" violates not-null constraint
DETAIL: Failing row contains (99, default.jpg, null, 1).
似乎并没有收到我的数据输入。
这是我的绘画/视图中的相关代码
class PaintingPhotosListCreateAPIView(generics.ListCreateAPIView):
queryset = PaintingPhoto.objects.all()
serializer_class = PaintingPhotoSerializer
permission_classes = [permissions.IsAuthenticatedOrReadOnly]
pagination_class = PaintingPhotosPageNumberPagination
def perform_create(self, serializer):
serializer.save(user=self.request.user)
def get_queryset(self):
# filter the queryset based on the filters applied
queryList = PaintingPhoto.objects.all()
title = self.request.query_params.get('title', None)
src = self.request.query_params.get('src', None)
return queryList
class PaintingPhotosTitleListCreateAPIView(generics.ListCreateAPIView):
queryset = PaintingPhoto.objects.all()
serializer_class = PaintingPhotoSerializer
lookup_field = 'title_id'
permission_classes = [permissions.IsAuthenticatedOrReadOnly]
def perform_create(self, serializer):
serializer.save(user=self.request.user)
def get_queryset(self):
title_id = self.kwargs['title_id']
return PaintingPhoto.objects.filter(title_id=title_id)
class PaintingPhotosSpecificDetailAPIView(generics.RetrieveUpdateDestroyAPIView):
queryset = PaintingPhoto.objects.all()
serializer_class = PaintingPhotoSerializer
lookup_field = 'id'
permission_classes = [IsOwnerOrReadOnly]
这是painting / serializers.py
中的相关代码class PaintingPhotoSerializer(serializers.ModelSerializer):
title_name = serializers.CharField(source='title', read_only=True)
photo_title_url = serializers.HyperlinkedIdentityField(
view_name='paintings-api:photos-title-list',
read_only=True,
lookup_field='title_id'
)
photo_specific_url = serializers.HyperlinkedIdentityField(
view_name='paintings-api:photos-specific-detail',
read_only=True,
lookup_field='id'
)
owner = serializers.SerializerMethodField(read_only=True)
class Meta:
model = PaintingPhoto
fields =[
'title_id',
'src',
'title_name',
'photo_title_url',
'photo_specific_url',
'owner',
]
def get_owner(self, obj):
request = self.context['request']
if request.user.is_authenticated:
if obj.user == request.user:
return True
return False
非常感谢！