public async Task <AuthorDto> Merge(AuthorMergeDto authorMergeDto)
{
await using var transaction = _context.Database.BeginTransaction();
authorMergeDto.Author.IsConfirmed = true;
authorMergeDto.Author.Id = null;
var author = _mapper.Map <Author>(authorMergeDto.Author);
var bookIds = await _bookAuthorRepository.GetAll().Where(x => authorMergeDto.Authors.Contains(x.AuthorId)).Select(x => x.BookId).Distinct().ToListAsync();
var authors = await _authorRepository.GetAll().Where(x => authorMergeDto.Authors.Contains(x.Id)).ToListAsync();
_authorRepository.RemoveRange(authors);
await _authorRepository.SaveChangesAsync();
var newBookAuthors = new List <BookAuthor>();
foreach (var id in bookIds)
{
newBookAuthors.Add(new BookAuthor()
{
AuthorId = author.Id, BookId = id
});
}
author.BookAuthor = newBookAuthors;
_authorRepository.Add(author);
var affectedRows = await _authorRepository.SaveChangesAsync();
transaction.Commit();
return(affectedRows > 0 ? _mapper.Map <AuthorDto>(author) : null);
}
public async Task <IActionResult> PutAuthor([FromBody] AuthorMergeDto authorDto)
{
var author = await _authorService.Merge(authorDto);
if (author == null)
{
return(BadRequest());
}
return(CreatedAtAction("GetAuthor", new { id = author.Id }, author));
}