Django REST Framework上传图片：“提交的数据不是文件”

你遇到的问题是Django REST框架希望通过标准文件上传方法将文件作为多部分表单数据上传。这通常是一个file字段，但是Javascript Blob对象也适用于AJAX。

你正在寻找使用base64编码的字符串而非原始文件（默认情况下不支持）上传文件。那里有a的base64ImageField实现，但是最有前途的是pull请求。

由于这些文件主要是为Django REST框架2.x设计的，因此我对pull请求中的一个文件进行了改进，并创建了一个应与DRF 3兼容的文件。

serializers.py

from rest_framework import serializers    class base64ImageField(serializers.ImageField):    """    A Django REST framework field for handling image-uploads through raw post data.    It uses base64 for encoding and decoding the contents of the file.    Heavily based on    https://github.com/tomchristie/django-rest-framework/pull/1268    Updated for Django REST framework 3.    """    def to_internal_value(self, data):        from django.core.files.base import ContentFile        import base64        import six        import uuid        # Check if this is a base64 string        if isinstance(data, six.string_types): # Check if the base64 string is in the "data:" format if 'data:' in data and ';base64,' in data:     # Break out the header from the base64 content     header, data = data.split(';base64,') # Try to depre the file. Return validation error if it fails. try:     depred_file = base64.b64depre(data) except TypeError:     self.fail('invalid_image') # Generate file name: file_name = str(uuid.uuid4())[:12] # 12 characters are more than enough. # Get the file name extension: file_extension = self.get_file_extension(file_name, depred_file) complete_file_name = "%s.%s" % (file_name, file_extension, ) data = ContentFile(depred_file, name=complete_file_name)        return super(base64ImageField, self).to_internal_value(data)    def get_file_extension(self, file_name, depred_file):        import imghdr        extension = imghdr.what(file_name, depred_file)        extension = "jpg" if extension == "jpeg" else extension        return extension

应该用它代替

ImageField

class ImageSerializer(serializers.ModelSerializer):    image = base64ImageField(        max_length=None, use_url=True,    )    class meta:        model = Image        fields = ("id", 'image', 'owner', 'time_created', )

这应该允许你指定base64编码的字符串，或者指定BlobDjango REST框架通常期望的标准对象。