C
C#10mo ago
Alparslan~

✅ System.InvalidOperationException: The LINQ expression

Hello guys. I'm writing a blog API, and in the process of adding a category, I want the first letter of the value in my DTO object to always be capitalized and added to the database in that format. I've tried many attempts, but I keep getting errors, and I haven't been able to find a solution even with AI. If you can help, I'd appreciate it. CategoryRepo: public async Task<CategoryDto> CreateCategoryAsync(CategoryDto categoryDto) { categoryDto.Name = CultureInfo.CurrentCulture.TextInfo.ToTitleCase(categoryDto.Name); var normalizedName = categoryDto.Name.Substring(0, 1).ToUpperInvariant() + categoryDto.Name.Substring(1).ToLowerInvariant(); var existingCategory = await _context.Categories.AnyAsync(x => x.Name.ToUpperInvariant() == normalizedName && x.Id != categoryDto.Id); if (existingCategory) { throw new InvalidOperationException("Aynı isimde bir kategori zaten var."); } var categoryEntity = _mapper.Map<Category>(categoryDto); await _context.Categories.AddAsync(categoryEntity); await _unitOfWork.SaveChangesAsync(); return _mapper.Map<CategoryDto>(categoryEntity); } Error : System.InvalidOperationException: The LINQ expression 'DbSet<Category>()\r\n .Any(c => c.Name.Equals(\r\n value: normalizedName_0, \r\n comparisonType: OrdinalIgnoreCase) && c.Id != categoryId_1)' could not be translated. Additional information: Translation of the 'string.Equals' overload with a 'StringComparison' parameter is not supported. See https://go.microsoft.com/fwlink/?linkid=2129535 for more information. Either rewrite the query in a form that can be translated, or switch to client evaluation explicitly by inserting a call to 'AsEnumerable', 'AsAsyncEnumerable', 'ToList', or 'ToListAsync'.
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2 Replies
Jimmacle
Jimmacle10mo ago
it tells you in the error Translation of the 'string.Equals' overload with a 'StringComparison' parameter is not supported. as an aside, you shouldn't be using AddAsync unless you're using hilo key generation
Alparslan~
Alparslan~OP10mo ago
okey
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