部署的azure函数返回404 Not Found错误

Question

今天我使用实体框架和 postgres 创建了许多函数，并在本地主机上测试了它们。所以我部署到Azure，当我在Azure门户上测试它时，一切都返回404。我尝试了很多方法，但没有解决它。请有人帮我解决这个问题。

我的功能如下：

public class CityFunction
    {
        private readonly CityService _cityService;

        public CityFunction()
        {
            var dbContext = new AppDbContext();
            _cityService = new CityService(dbContext);
        }

        private JsonSerializerOptions GetJsonSerializerOptions()
        {
            return new JsonSerializerOptions
            {
                WriteIndented = true,
                ReferenceHandler = System.Text.Json.Serialization.ReferenceHandler.IgnoreCycles,
            };
        }

[FunctionName("FindCityById")]
        public async Task<IActionResult> FindCityById(
            [HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = "cities/{idCity:int}")]
                HttpRequest req,
            int idCity,
            ILogger log
        )
        {
            var city = await _cityService.FindCityById(idCity);
            var jsonSerializerOptions = GetJsonSerializerOptions();
            var jsonResponse = JsonSerializer.Serialize(city, jsonSerializerOptions);
            return city != null
                ? new ContentResult
                {
                    Content = jsonResponse,
                    ContentType = "application/json",
                    StatusCode = 200,
                }
                : new NotFoundResult();
        }

Answer 1

给定的代码适用于

In-Process model

• 确保您选择了

  In-Process

  版本。

下面给出的代码对我有用：

我刚刚用过

public  Function1(CityService cityService)
  { 
      _cityService = cityService;
  }

代替

public CityFunction()
        {
            var dbContext = new AppDbContext();
            _cityService = new CityService(dbContext);
        }

Function1.cs

:

using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using System.Text.Json;

namespace dotnet8_inprocess
{
    public class Function1
    {
        private readonly CityService _cityService;

        public Function1(CityService cityService)
        {
            _cityService = cityService;
        }

        private JsonSerializerOptions GetJsonSerializerOptions()
        {
            return new JsonSerializerOptions
            {
                WriteIndented = true,
                ReferenceHandler = System.Text.Json.Serialization.ReferenceHandler.IgnoreCycles,
            };
        }
        [FunctionName("Function1")]
        public async Task<IActionResult> Run(
            [HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = "cities/{idCity:int}")] HttpRequest req, int idCity,
            ILogger log)
        {
            log.LogInformation("C# HTTP trigger function processed a request.");

            var city = await _cityService.FindCityById(idCity);
            var jsonSerializerOptions = GetJsonSerializerOptions();
            var jsonResponse = JsonSerializer.Serialize(city, jsonSerializerOptions);
            return city != null
                ? new ContentResult
                {
                    Content = jsonResponse,
                    ContentType = "application/json",
                    StatusCode = 200,
                }
                : new NotFoundResult();
        }
    }
}

dotnet8_inprocess

:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net8.0</TargetFramework>
    <AzureFunctionsVersion>v4</AzureFunctionsVersion>
    <RootNamespace>dotnet8_inprocess</RootNamespace>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="Microsoft.Azure.Functions.Extensions" Version="1.1.0" />
    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="8.0.8" />
    <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="4.4.1" />
    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="8.0.4" />
  </ItemGroup>
  <ItemGroup>
    <None Update="host.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
    <None Update="local.settings.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
      <CopyToPublishDirectory>Never</CopyToPublishDirectory>
    </None>
  </ItemGroup>
</Project>

My Data

：

postgres=> select * From city;
 id |    name     | population | countrycode |         createdat          
----+-------------+------------+-------------+----------------------------
  1 | Los Angeles |    3980400 | USA         | 2024-09-17 04:35:54.869276
  2 | Tokyo       |   37435191 | JPN         | 2024-09-17 04:35:54.869276
  3 | London      |    8982000 | GBR         | 2024-09-17 04:35:54.869276
  4 | New Delhi   | 1413644826 | IND         | 2024-09-17 04:35:54.869276
(4 rows)

OUTPUT

：

本地：

天蓝色：