public IActionResult CreateManufacturer([FromBody] Manufacturer manufacturerToCreate) { if (manufacturerToCreate == null) { return(BadRequest(ModelState)); } var manufacturer = _manufacturerRepository.GetManufacturers() .Where(c => c.Name.Trim().ToUpper() == manufacturerToCreate.Name.Trim().ToUpper()) .FirstOrDefault(); if (manufacturer != null) { ModelState.AddModelError("", $"Производитель {manufacturerToCreate.Name} уже существует"); return(StatusCode(422, ModelState)); } if (!ModelState.IsValid) { return(BadRequest(ModelState)); } if (!_manufacturerRepository.CreateManufacturer(manufacturerToCreate)) { ModelState.AddModelError("", $"Что-то пошло не так при попытку сохранить {manufacturerToCreate.Name}"); return(StatusCode(500, ModelState)); } return(CreatedAtRoute("GetManufacturer", new { manufacturerId = manufacturerToCreate.Id }, manufacturerToCreate)); }