Microsoft OData控制器-在选择时调用操作

public class Product
{
    public int Id { get; set; }
    public string Name { get; set; }
    public decimal Price { get; set; }
}

public class ProductDto
{
    public int Id { get; set; }
    public string Name { get; set; }
    public decimal Price { get; set; }
    public bool IsAvailable { get; set; } // 这个字段不是Product实体的一部分
}

[ApiController]
[Route("odata/[controller]")]
public class ProductsController : ControllerBase
{
    private readonly IProductService _productService;

    public ProductsController(IProductService productService)
    {
        _productService = productService;
    }

    [HttpGet]
    [EnableQuery]
    public IActionResult Get()
    {
        var products = _productService.GetProducts();
        return Ok(products);
    }

    [HttpGet("{key}")]
    [EnableQuery]
    public IActionResult Get([FromODataUri] int key)
    {
        var product = _productService.GetProductById(key);
        if (product == null)
        {
            return NotFound();
        }
        return Ok(product);
    }

    // 定义一个动作，该动作可以在选择时被调用
    [HttpGet("{key}/isavailable")]
    public IActionResult IsAvailable([FromODataUri] int key)
    {
        var product = _productService.GetProductById(key);
        if (product == null)
        {
            return NotFound();
        }

        // 这里可以执行一些逻辑来确定产品是否可用
        var isAvailable = _productService.CheckProductAvailability(product);

        return Ok(new ProductDto
        {
            Id = product.Id,
            Name = product.Name,
            Price = product.Price,
            IsAvailable = isAvailable
        });
    }
}

public void ConfigureServices(IServiceCollection services)
{
    services.AddOData();
    services.AddControllers(mvcOptions =>
    {
        mvcOptions.EnableEndpointRouting = false;
    });
    services.AddSingleton<IProductService, ProductService>();
}

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    // ... 其他中间件配置 ...

    app.UseEndpoints(endpoints =>
    {
        endpoints.MapODataServiceRoute("odata", "odata", GetEdmModel());
    });
}

private static IEdmModel GetEdmModel()
{
    var odataBuilder = new ODataConventionModelBuilder();
    odataBuilder.EntitySet<Product>("Products");
    return odataBuilder.GetEdmModel();
}

http://<hostname>/odata/Products(1)/isavailable