Question

如何解决尝试发出POST请求时遇到的错误？

我尝试通过大摇大摆执行以下json代码：

{


"productID": 0,
  "productName": "string",
  "price": 0,
  "marketID": 0,
  "market": {
    "marketID": 0,
    "name": "string",
    "budget": 0,
    "startDate": "2019-12-10",
    "productGuideID": 0,
    "rowVersion": "string",
    "administrator": {
      "hireDate": "2019-12-10",
      "productAssignments": [
        null
      ],
      "countryAssignment": {
        "productGuideID": 0,
        "location": "string"
      },
      "id": 0,
      "lastName": "string",
      "firstMidName": "string"
    },
    "products": [
      null
    ]
  },
  "subscriptions": [
    {
      "subscriptionID": 0,
      "productID": 0,
      "customerID": 0,
      "customerLoyalty": 0,
      "customer": {
        "subscriptionDate": "2019-12-10",
        "subscriptions": [
          null
        ],
        "id": 0,
        "lastName": "string",
        "firstMidName": "string"
      }
    }
  ],
  "productAssignments": [
    {
      "productGuideID": 0,
      "productID": 0,
      "productGuide": {
        "hireDate": "2019-12-10",
        "productAssignments": [
          null
        ],
        "countryAssignment": {
          "productGuideID": 0,
          "location": "string"
        },
        "id": 0,
        "lastName": "string",
        "firstMidName": "string"
      }
    }
  ]
}

执行它之后，我认为我从服务器收到400响应：我还认为我收到200成功的反应？：我还尝试将标准的json代码从大张旗鼓放到Postman中，然后出现404错误：

以下是我在ProductsController中的Http Post方法：

[HttpPost]
    public async Task<ActionResult<Product>> PostProduct(Product product)
    {
        _context.Products.Add(product);
        try
        {
            await _context.SaveChangesAsync();
        }
        catch (DbUpdateException)
        {
            if (ProductExists(product.ProductID))
            {
                return Conflict();
            }
            else
            {
                throw;
            }
        }

        return CreatedAtAction("GetProduct", new { id = product.ProductID }, 

product);
        }

以下是VitekAPI项目所在的github存储库的链接： https://github.com/tux-superman/MVCandAPI

我的产品型号：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace VitekSky.Models
{
public class Product
{

    [DatabaseGenerated(DatabaseGeneratedOption.None)]
    [Display(Name = "Product Number")]
    public int ProductID { get; set; }
    [StringLength(50, MinimumLength = 3)]
    public string ProductName { get; set; }


    [Range(0, 99999)]
    public int Price { get; set; }

    public int MarketID { get; set; }


    public Market Market { get; set; }    
    public ICollection<Subscription> Subscriptions { get; set; }
    public ICollection<ProductAssignment> ProductAssignments { get; set; }

}
}

我的市场模型：

 public class Market
{
    public int MarketID { get; set; }

    [StringLength(50, MinimumLength = 3)]
    public string Name { get; set; }

    [DataType(DataType.Currency)]
    [Column(TypeName = "money")]
    public decimal Budget { get; set; }

    [DataType(DataType.Date)]
    [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)]
    [Display(Name = "Start Date")]
    public DateTime StartDate { get; set; }

    public int? ProductGuideID { get; set; }

    [Timestamp]
    public byte[] RowVersion { get; set; }

    public ProductGuide Administrator { get; set; }
    public ICollection<Product> Products { get; set; }
}

Answer 1

将"string"绑定到byte[]时发生错误。rowVersion是一个8字节的数组。每个字节代表一个64位整数的一部分，范围为0-255。

您无需为RowVersion设置值，如果要创建模型，只需将其从json中删除。

此外，最好不要在没有任何更改的情况下将swagger的示例值复制为请求正文，而只是提供示例格式。

在这种情况下，您需要将[null]替换为空。

有效的json可能是这样的：

{
"productID": 0,
"productName": "string",
"price": 0,
"marketID": 0,
"market": {
  "marketID": 0,
  "name": "string",
  "budget": 0,
  "startDate": "2019-12-10",
  "productGuideID": 0,
  "administrator": {
    "hireDate": "2019-12-10",
    "productAssignments": null,
    "countryAssignment": {
      "productGuideID": 0,
      "location": "string"
    },
    "id": 0,
    "lastName": "string",
    "firstMidName": "string"
  },

  "products": null

},
"subscriptions": [
  {
    "subscriptionID": 0,
    "productID": 0,
    "customerID": 0,
    "customerLoyalty": 0,
    "customer": {
      "subscriptionDate": "2019-12-10",
      "subscriptions": null,

      "id": 0,
      "lastName": "string",
      "firstMidName": "string"
    }
  }
],
"productAssignments": [
  {
    "productGuideID": 0,
    "productID": 0,
    "productGuide": {
      "hireDate": "2019-12-10",
      "productAssignments": null,
      "countryAssignment": {
        "productGuideID": 0,
        "location": "string"
      },
      "id": 0,
      "lastName": "string",
      "firstMidName": "string"
    }
  }
]
}

Answer 2

我已经遍历了您在ProductsController.cs类中的代码

我看不到您在招摇和邮递员中使用的带有“产品”和“产品” URI的发布请求

/ api /产品和 / api / Prod

这就是您面临404错误的原因

注意：如果您可以提供任何网址，我可以尝试对其进行测试

如何发出发帖请求？

2 个答案: