如何使用图像字段Django Rest框架更新对象

I have a model called ProductImage that contains a few fields and an Django ImageField. In this case I already have the object created, and I want to update the featured boolean in the object.

我有一个名为ProductImage的模型，它包含几个字段和一个Django ImageField。在这种情况下，我已经创建了对象，并且我想要更新对象中具有特色的布尔值。

Problem is that when I do a $http.put() (Using AngularJS) I get an error returned saying:

问题是，当我执行$http.put()(使用AngularJS)时，会得到一个返回的错误:

The submitted data was not a file. Check the encoding type on the form.

提交的数据不是一个文件。检查窗体上的编码类型。

My REST API Object looks like this on the GET request:

我的REST API对象在GET请求中是这样的:

{
    "id": 15,
    "image": "http://127.0.0.1:8000/media/products/photo_1_5.JPG",
    "alt": "HelloWorld",
    "featured": false,
    "product": 1
}

The HTTP PUT request I send looks like this: (Notice featured has been changed to true)

我发送的HTTP PUT请求如下所示:

{
    "id": 15,
    "image": "http://127.0.0.1:8000/media/products/photo_1_5.JPG",
    "alt": "HelloWorld",
    "featured": true,
    "product": 1
}

So... How do I update my object without having to re-submit/re-upload the image file?

所以…如何在无需重新提交/重新上传图像文件的情况下更新对象?

1 个解决方案

#1

If you use PUT to update an object you have to send a full instance. So in your case you have to send a image file for image not an url to the image.

如果使用PUT更新对象，则必须发送一个完整的实例。所以在你的情况下你必须为图像发送一个图像文件而不是一个url到图像。

The easiest solution is probably to use PATCH instead of PUT. Then you can do a partial update and send only the updated fields.

最简单的解决方案可能是使用PATCH而不是PUT。然后可以进行部分更新，只发送更新的字段。

{
    "featured": true
}

#1