使用 $select 或 $filter 时 OData 默认为帕斯卡大小写

Question

在我的 .net core 3.1 web api 项目中，我使用了Microsoft.AspnetCore.Odata 和Microsoft.AspnetCore.Mvc.NewtonsoftJson。我的创业公司是这样的：

    services.AddOData();
            services.AddControllers(options =>
            {
                IEnumerable<ODataOutputFormatter> outputFormatters =
                    options.OutputFormatters.OfType<ODataOutputFormatter>()
                        .Where(foramtter => foramtter.SupportedMediaTypes.Count == 0);

                foreach (var outputFormatter in outputFormatters)
                {
                    outputFormatter.SupportedMediaTypes.Add(new MediaTypeHeaderValue("application/odata"));
                }

            }).AddNewtonsoftJson(options =>
            {
                options.UseCamelCasing(false);
                options.SerializerSettings.ContractResolver = new DefaultContractResolver() { NamingStrategy = new CamelCaseNamingStrategy() };
            });
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
app.UseEndpoints(endpoints =>
            {
                endpoints.MapHealthChecks("/health");
                endpoints.MapControllers().RequireAuthorization();
                endpoints.EnableDependencyInjection();
                endpoints.Select().OrderBy().Filter();
                endpoints.MapODataRoute("odata", "odata", GetEdmModel());
            });
}

IEdmModel GetEdmModel()
        {
            var builder = new ODataConventionModelBuilder();
            builder.EnableLowerCamelCase();
            builder.EntitySet<Ebp>("Ebp");
            return builder.GetEdmModel();
        }

当我使用{{baseUrl}}/odata/coaching/ebp/all 调用GET 端点时，结果在camelCase 中，正如我所料。

但是，当我引入任何$select 或$filter 选项进行查询时，我的回复将更改为PascalCase

为什么会这样？

Answer 1

答案在this post。在附加到服务集合的AddNewtonSoftJson 方法中，我应该将SerializerSettings.ContractResolver 设置为CamelCasePropertyNamesContractResolver。

services.AddOData();
        services.AddControllers(options =>
        {
            IEnumerable<ODataOutputFormatter> outputFormatters =
                options.OutputFormatters.OfType<ODataOutputFormatter>()
                    .Where(foramtter => foramtter.SupportedMediaTypes.Count == 0);

            foreach (var outputFormatter in outputFormatters)
            {
                outputFormatter.SupportedMediaTypes.Add(new MediaTypeHeaderValue("application/odata"));
            }

        }).AddNewtonsoftJson(options =>
        {
            options.UseCamelCasing(false);
            options.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
        });