CreatedAtRoute CreatedAtAction 没有返回正确的响应

Question

我有以下代码，如果我对 CreateBook 进行帖子调用，它会成功返回，但具有以下响应

{
  "id": "a0add985-60f1-4adc-e15e-08d7d51b721a",
  "title": "string",
  "description": "string",
  "amountOfPages": null,
  "authorId": "2902b665-1190-4c70-9915-b9c2d7680450",
  "author": null
}

如果我理解正确，它应该通过传递 authorId 和 bookID 来调用函数 getBook，它将返回针对该书和作者的值，而不是 bookToAdd 中的书？ 请告诉我，谢谢各位。

    /// <summary>
    /// Get a book by id for a specific author
    /// </summary>
    /// <param name="authorId">The id of the book author</param>
    /// <param name="bookId">The id of the book</param>
    /// <returns>An ActionResult of type Book</returns>
    /// <response code="200">Returns the requested book</response>
    [HttpGet("{bookId}",Name = "GetBook")]
    [ProducesResponseType(StatusCodes.Status404NotFound)]
    [ProducesResponseType(StatusCodes.Status200OK)]
    public async Task<ActionResult<Book>> GetBook(
        Guid authorId,
        Guid bookId)
    {
        if (! await _authorRepository.AuthorExistsAsync(authorId))
        {
            return NotFound();
        }

        var bookFromRepo = await _bookRepository.GetBookAsync(authorId, bookId);
        if (bookFromRepo == null)
        {
            return NotFound();
        }

        return Ok(_mapper.Map<Book>(bookFromRepo));
    }




    /// <summary>
    /// Create a book for a specific author
    /// </summary>
    /// <remarks> default  2902B665-1190-4C70-9915-B9C2D7680450</remarks>
    /// <param name="authorId">The id of the book author</param>
    /// <param name="bookForCreation">The book to create</param>
    /// <returns>An ActionResult of type Book</returns>
    /// <response code="422">Validation error</response>
    [HttpPost()]
    [Consumes("application/json")]
    [ProducesResponseType(StatusCodes.Status201Created)]
    [ProducesResponseType(StatusCodes.Status404NotFound)]
    [ProducesResponseType(StatusCodes.Status422UnprocessableEntity, 
        Type = typeof(Microsoft.AspNetCore.Mvc.ModelBinding.ModelStateDictionary))]
    public async Task<ActionResult<Book>> CreateBook(
        Guid authorId,
        [FromBody] BookForCreation bookForCreation)
    {
        if (!await _authorRepository.AuthorExistsAsync(authorId))
        {
            return NotFound();
        }

        var bookToAdd = _mapper.Map<Entities.Book>(bookForCreation);
        bookToAdd.AuthorId = authorId;
        _bookRepository.AddBook(bookToAdd);
        await _bookRepository.SaveChangesAsync();

        //return CreatedAtAction(
        //    nameof(GetBook),
        //     new { authorId = authorId, bookId = bookToAdd.Id },
        //    //new { version = HttpContext.GetRequestedApiVersion().ToString(), authorId, bookId = bookToAdd.Id },
        //    bookToAdd);

        return CreatedAtRoute(
            routeName: "GetBook",
            routeValues: new { authorId = authorId, bookId = bookToAdd.Id },
            value: bookToAdd
            );
    }

Answer 1

这不是CreatedAtRoute工作方式。 它所做的只是设置一个标头，以便客户端知道所创建资源的位置。请参阅 HTTP 状态 201

在您的示例中，它会在响应上设置一个标头，如下所示

Location: https://example.com/api/Book/GetBook/123

您的CreateBook端点将返回bookToAdd