Masonite-AttributeError>“str”对象没有属性“filename”

我有一个表单如下所示:

<form method="POST" action="/posts">
    {{ csrf_field }}
    <input type="text" name="username">
    <input type="file" name="image">

    <input type="submit" value="Submit">
</form>

但当我提交此表单并尝试上载时,我只得到图像的名称:

def posts(self, request: Request, upload: Upload):
    upload.store(request().input('image'))

我遇到了一个例外:

AttributeError > 'str' object has no attribute 'filename'