Question

我目前通过使用带有angularJS的Django REST框架创建的API上传图像但问题是它存储为媒体文件但未存储在数据库中。

这是我的ViewSet代码。

# views.py

import time

from rest_framework import viewsets
from rest_framework.permissions import IsAdminUser
from django.contrib.auth import get_user_model

from .serializers import UserSerializer


class UserViewSet(viewsets.ModelViewSet):
    permission_classes = (IsAdminUser,)
    serializer_class = UserSerializer
    queryset = get_user_model()

    def perform_update(self, serializer):
        serializer.save(profile_image=self.request.data.get('file'))

但是，当我在time.sleep(1)函数之前添加代码serializer.save()时，它已成功地神秘地保存到数据库中。

    def perform_update(self, serializer):
        time.sleep(1) # Delay 1s
        serializer.save(profile_image=self.request.data.get('file'))

为什么会这样？请给我一个明智的解决方案。

我不知道它是否会有所帮助，所以我附上了angularjs代码。

.service('fileUpload', ['$http', function ($http) {
    this.uploadFileToUrl = function(file, uploadUrl){
        var fd = new FormData();
        fd.append('file', file);
        return $http.patch(uploadUrl, fd, {
            transformRequest: angular.identity,
            headers: {'Content-Type': undefined}
        })
    }
  }])

这是我要求分享的User模型。我省略了与错误无关的代码我确认图像保存在我指定的路径中。但未保存在数据库中。

# models.py

import datetime
import os

from django.contrib.auth.models import AbstractBaseUser, PermissionsMixin
from django.db import models


def set_filename_format(now, instance, filename):
    return "{username}-{date}-{microsecond}{extension}".format(
        username=instance.username,
        date=now.date().strftime("%Y-%m-%d"),
        microsecond=now.microsecond,
        extension=os.path.splitext(filename)[1],
    )


def profile_image_path(instance, filename):
    now = datetime.datetime.now()
    path = "profile_images/{username}/{year}/{month}/{day}/{filename}".format(
        username=instance.username,
        year=now.year,
        month=now.month,
        day=now.day,
        filename=set_filename_format(now, instance, filename),
    )
    return path


class User(AbstractBaseUser, PermissionsMixin):
    # ...
    profile_image = models.ImageField(
        upload_to=profile_image_path,
        blank=True,
    )
    # ...

使用angularJS在Django REST框架中上传图像文件

0 个答案: