public async Task <IActionResult> Post([FromBody] ParentRequest model)
        {
            var parentModel = new ParentModel
            {
                StringVar = model.StringVar,
            };

            await _parentRepositoryManager.CreateAsync(parentModel);

            await _parentRepositoryManager.SaveChangesAsync();

            return(Ok());
        }
        public async Task <IActionResult> Put(int id, [FromBody] ParentRequest model)
        {
            var parentModel =
                await _parentRepositoryManager
                .GetEntityWithoutTrackingAsync(parentModel => parentModel.Id == id);

            if (parentModel is null)
            {
                return(NotFound());
            }

            parentModel.StringVar = model.StringVar;
            _parentRepositoryManager.Update(parentModel);
            await _parentRepositoryManager.SaveChangesAsync();

            return(Ok());
        }