public IActionResult AddValue(int itemId, [FromBody] TodoItemValue itemValue)
        {
            try
            {
                if (itemValue == null || itemId.Equals(null))
                {
                    return(BadRequest());
                }

                var todo = _context.TodoItems.FirstOrDefault(t => t.Id == itemId);
                if (todo == null)
                {
                    return(NotFound());
                }

                if (todo.TodoItemValues == null)
                {
                    todo.TodoItemValues = new List <TodoItemValue>();
                }

                todo.TodoItemValues.Add(itemValue);
                _context.TodoItems.Update(todo);
                _context.SaveChanges();

                return(CreatedAtRoute("GetTodo", new
                {
                    id = todo.Id,
                    name = todo.Name,
                    isComplete = todo.IsComplete,
                    values = todo.TodoItemValues
                }, _context.TodoItems.Where(item => item.Id == itemId).Select(item => item.TodoItemValues)));
            }
            catch (Exception e)
            {
                return(BadRequest("Wrong request: " + e.Message));
            }
        }
        public IActionResult UpdateValue(int itemId, [FromBody] TodoItemValue value)
        {
            try
            {
                if (value == null)
                {
                    return(BadRequest());
                }

                var item = _context.TodoItems.Include(ti => ti.TodoItemValues).FirstOrDefault(t => t.Id == itemId);

                if (item == null)
                {
                    return(NotFound());
                }

                var val = item.TodoItemValues.FirstOrDefault(v => v.Id == value.Id);

                if (val == null)
                {
                    AddValue(itemId, value);
                }
                else
                {
                    val.Value = value.Value;
                }

                _context.TodoItems.Update(item);
                _context.SaveChanges();
                return(new ObjectResult($"New value is '{val?.Value}' in item {item.Id} for value {val?.Id}"));
            }
            catch (Exception e)
            {
                return(BadRequest("Wrong request: " + e.Message));
            }
        }