asp.net core - modelstate badrequest 不一致的行为

Question

我有一个简单的模型：

public class Item : Entity<int>
{
    [Required]
    public string Name { get; set; }
    [Required]
    public int Cost { get; set; }
}

内部控制器：

[HttpPost]
public async Task<IActionResult> Create([FromBody] Item item)
{
    if(!ModelState.IsValid) 
    {
       return BadRequest(ModelState);
    }
    repository.Create(item);
    await repository.SaveAsync();
    return Created($"/api/v1/items/{item.Id}", new { message = "Item was created successfully!" });
}

现在，对于以下三个不正确的示例输入，我得到以下响应：

示例 #1：

POST http://localhost:5000/api/v1/items
content-type: application/json

{
    "name": "sample1",
    "cost": $100000
}

回复：

{
  "cost": [
    "The input was not valid."
  ]
}

示例 #2：

POST http://localhost:5000/api/v1/items
content-type: application/json

{
    "name": "sample2",
    "cost": "10000000000000000000000000"
}

回复：

{
  "cost": [
    "The input was not valid."
  ]
}

示例 #3：这似乎是一个错误。出现一个空键（而不是 int out of range 错误）

POST http://localhost:5000/api/v1/items
content-type: application/json

{
    "name": "sample3",
    "cost": 10000000000000000000000000
}

回复：

{
  "": [
    "The input was not valid."
  ],
  "cost": [
    "The input was not valid."
  ]
}

编辑： 在 github 上添加了一个跟踪票 - https://github.com/aspnet/Mvc/issues/5672

Answer 1

第一个和最后一个是无效的 json，第二个对于整数 cost 的数字太大。确保您的费用不超过INT_MAX: 2147483647。