API versioning in Swagger UI

user_10533247 0
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I'm looking into .net core 6, API versioning and trying to show two versions "v1" and "v2" in swagger UI but only "v1" is showing though no error is appearing .

Here is my program.cs code

   builder.Services.AddApiVersioning(setup =>
    {
        setup.DefaultApiVersion = new ApiVersion(1,0);
        setup.AssumeDefaultVersionWhenUnspecified = true;
        setup.ReportApiVersions = true;
    });

    builder.Services.AddVersionedApiExplorer(setup =>
    {
        setup.GroupNameFormat = "'v'VVV";
        setup.SubstituteApiVersionInUrl = true;
    });

    builder.Services.AddSwaggerGen(options =>
    {
        
        options.SwaggerDoc("v1", new OpenApiInfo
        {
            Version = "v1",
            Title = "API",
            Description = "An API in dotnet core 6",

        });
        var xmlFilename = $"{Assembly.GetExecutingAssembly().GetName().Name}.xml";
        options.IncludeXmlComments(Path.Combine($@"{AppContext.BaseDirectory}", xmlFilename));
    });

    if (app.Environment.IsDevelopment())
    {
        app.UseSwagger();
        app.UseSwaggerUI();
    }

v1 controller have this action method

    [MapToApiVersion("1.0")]
    [HttpGet]
    [Route("GetLast12MonthBalances")]
    public async Task<ApiResponse> GetLast12MonthBalances()
    {

v2 controller have this action method

   [MapToApiVersion("2.0")]
   [HttpGet,Route("GetLast12MonthBalances")]
   public async Task<ApiResponse> GetLast12MonthBalances()
   {

Any idea what is missing ?

swashbuckle.aspnetcore swagger asp.net-core c#
1 Answers

You need to configure SwaggerGenOptions using options pattern.

1st- Create a class as follows:

namespace MyApi
{
    public class ConfigureSwaggerOptions
        : IConfigureNamedOptions<SwaggerGenOptions>
    {
        private readonly IApiVersionDescriptionProvider provider;

        public ConfigureSwaggerOptions(
            IApiVersionDescriptionProvider provider)
        {
            this.provider = provider;
        }

        public void Configure(SwaggerGenOptions options)
        {
            // add swagger document for every API version discovered
            foreach (var description in provider.ApiVersionDescriptions)
            {
                options.SwaggerDoc(
                    description.GroupName, 
                    CreateVersionInfo(description));
            }
        }

        public void Configure(string name, SwaggerGenOptions options)
        {
            Configure(options);
        }

        private OpenApiInfo CreateVersionInfo(
                ApiVersionDescription description)
        {
            var info = new OpenApiInfo()
            {
                Title = "My API",
                Version = description.ApiVersion.ToString()
            };

            if (description.IsDeprecated)
            {
                info.Description += " deprecated API.";
            }

            return info;
        }
    }
}

2-wire up the options with the service collection

public void ConfigureServices(IServiceCollection services)
{
    services.AddScoped<ITestsRepository, TestssRepository>();
    services.AddControllers();

    services.AddApiVersioning(setup =>
    {
        setup.DefaultApiVersion = new ApiVersion(1, 0);
        setup.AssumeDefaultVersionWhenUnspecified = true;
        setup.ReportApiVersions = true;
    });

    services.AddVersionedApiExplorer(setup =>
    {
        setup.GroupNameFormat = "'v'VVV";
        setup.SubstituteApiVersionInUrl = true;
    });

    services.AddSwaggerGen();
    services.ConfigureOptions<ConfigureSwaggerOptions>();
}
user_135797140
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