迁移到 .Net Core 3 后 JsonPatchDocument 为空 [英] JsonPatchDocument is null after migration to .Net Core 3

问题描述

我有一个带有多个补丁操作的 AspNetCore-WebApi-Project，它在 Core 2.2 中运行良好.迁移到 Core 3 后，[FromBody] JsonPatchDocument 为空.我的 Get/Post 方法仍然按预期运行.

这是我创业的一部分:

 services.AddDbContext(options => options.UseLazyLoadingProxies().UseNpgsql(Configuration.GetConnectionString("MyConnectionString"),选择 =>opt.UseNodaTime()));services.AddSwaggerGen(c =>{c.SwaggerDoc("v1", new OpenApiInfo { Title = "My-API", Version = "v1" });});services.AddControllers().AddNewtonsoftJson();

这是我的操作:

[HttpPatch("{id}")]公共异步任务补丁(Guid id，[FromBody] JsonPatchDocument补丁文件){等待 this.service.HandlePatchAsync(id, patchDocument);返回 NoContent();}

这是正文内容:

<预><代码>[{"op": "替换",路径":/名称"，值":新名称"},{"op": "替换","路径": "/国家","value": "德国"}]

有人知道这里出了什么问题吗?

解决方案

我遇到了类似的问题.我打算完全摆脱 Newtonsoft，但在那种情况下，带有 JsonPatchDocument 的补丁不起作用.

根据 https://docs.microsoft.com/en-us/aspnet/core/migration/22-to-30?view=aspnetcore-3.0&tabs=visual-studio#jsonnet-支持你应该:

1. 添加对 Microsoft.AspNetCore.Mvc.NewtonsoftJson

的包引用

2. 在启动时更改代码，将 MVC 添加到 services.AddMvc().AddNewtonsoftJson();

你做了第二步，但第一步呢?这对我有帮助.

不幸的是，我不知道如何在没有 .AddNewtonsoftJson()

的情况下使 JsonPatchDocument 工作

I have a AspNetCore-WebApi-Project with several patch-operations, which worked fine with Core 2.2. After migration to Core 3 the [FromBody] JsonPatchDocument<T> is null. My Get/Post-Methods are still functioning as expected.

This is one part of my Startup:

    services.AddDbContext<MyContext>(options => options
                    .UseLazyLoadingProxies()
                    .UseNpgsql(Configuration.GetConnectionString("MyConnectionString"), 
                        opt => opt.UseNodaTime()));

    services.AddSwaggerGen(c =>
    {
        c.SwaggerDoc("v1", new OpenApiInfo { Title = "My-API", Version = "v1" });
    });
    services.AddControllers()
        .AddNewtonsoftJson();

This is my Action:

[HttpPatch("{id}")]
public async Task<IActionResult> Patch(Guid id, 
                            [FromBody] JsonPatchDocument<MyViewModel> patchDocument)
{
    await this.service.HandlePatchAsync(id, patchDocument);
    return NoContent();
}

This is the body-content:

[   
    {
        "op": "replace",
        "path": "/name",
        "value": "New Name" 
    },
    {
        "op": "replace",
        "path": "/country",
        "value": "Germany" 
    }
]

Does anyone have an idea what is goung wrong here?

解决方案

I struggle with a similar issue. I was going to get rid of Newtonsoft at all, but in that case the patch with JsonPatchDocument was not working.

According to https://docs.microsoft.com/en-us/aspnet/core/migration/22-to-30?view=aspnetcore-3.0&tabs=visual-studio#jsonnet-support you should:

1. Add a package reference to Microsoft.AspNetCore.Mvc.NewtonsoftJson

2. Change code in the startup adding MVC to services.AddMvc().AddNewtonsoftJson();

You did the second step, but what about the first? This helped me.

Unfortunatelly, I do not know how to make JsonPatchDocument work without .AddNewtonsoftJson()

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