Django REST,上传的图片具有空值

Question

我在前端有Django REST和Angular的简单应用程序,我的图像上传有问题.
我的模特:

class Photo(models.Model):

    img = models.ImageField(upload_to='photos/', max_length=254)
    text = models.CharField(max_length=254, blank=True)

当我通过表单发送图像时,文本上传得很好,但图像具有空值.
从浏览器响应:

{ "IMG":空, "文": "测试"}

这是self.data.request我上传图片时打印的:

QueryDict:{'text':['test'],'InMemoryUploadedFile:filename.jpg(image/jpeg)]}

Serializer很简单ModelSerializer,只有两个模型字段.
视图:

class PhotoViewSet(viewsets.ModelViewSet):

    queryset = Photo.objects.all()
    serializer_class = PhotoSerializer
    parser_classes = (MultiPartParser, FormParser)

    def perform_create(self, serializer):
        serializer.save(img=self.request.data.get('file'))

photo_router = DefaultRouter()
photo_router.register(r'photo', PhotoViewSet)

对于图像上传我使用lib ng-file-upload,我尝试了另一种上传方式,图像也是null.
角度代码:

var app = angular.module('myApp', ['ngRoute', 'ngFileUpload']);

app.config(function ($routeProvider) {

    $routeProvider
         .when('/', {
            templateUrl: 'http://127.0.0.1:8000/static/js/angular/templates/home.html'
    })
});
app.config(['$httpProvider', function($httpProvider) {
    $httpProvider.defaults.xsrfCookieName = 'csrftoken';
    $httpProvider.defaults.xsrfHeaderName = 'X-CSRFToken';
}]);
app.controller('MyCtrl', ['$scope', 'Upload', '$timeout', function($scope, Upload, $timeout) {
    $scope.uploadPic = function(file) {
    file.upload = Upload.upload({
        url: '/api/photo/',
        data: {text: $scope.text, img: file},
    });

    file.upload.then(function (response) {
      $timeout(function () {
        file.result = response.data;
      });
    }, function (response) {
      if (response.status > 0)
        $scope.errorMsg = response.status + ': ' + response.data;
    }, function (evt) {
      file.progress = Math.min(100, parseInt(100.0 * evt.loaded / evt.total));
    });
    }
}]);

Answer 1

您正在发布此 json data: {text: $scope.text, img: file}，但在perform_create您调用的方法中self.request.data.get('file')。我认为你必须将其更改为

serializer.save(self.request.data.get('img'))