如何从存储中读取文件并保存为model.FileField对象？

from django.db import models

class MyModel(models.Model):
    file = models.FileField(upload_to='path/to/save/file')

from django.core.files.storage import default_storage
from django.core.files.base import ContentFile

def upload_file(request):
    if request.method == 'POST' and request.FILES['file']:
        file = request.FILES['file']
        file_name = file.name
        file_content = file.read()
        
        # 保存文件到存储后端
        file_path = 'path/to/save/file/' + file_name
        default_storage.save(file_path, ContentFile(file_content))
        
        # 创建模型对象并保存文件路径到FileField字段
        my_model = MyModel.objects.create(file=file_path)
        
        # 其他操作...