MySQL的实体框架6更新影响的所有行的Code First(MySQL Entity Framew

我使用实体框架6与MySQL。

插入是好的，我能插入新记录。但是当我尝试更新新创建的记录。它更新所有行。

这是我保存的代码。

    // This is the method I use every time I save a record.
    public async Task SaveAsync(User model)
    {

        if (model.Id != 0)
        {
            var original = GetOriginal(model.Id);

            if (model.Password == string.Empty)
            {
                model.Password = original.Password;
            }
            // The state is always modified if I'm updating the record.
            var state = Context.Entry(model).State;
        }


        await base.SaveAsync();
    }

当我保存，我想更新的记录，这里是更新查询。实体框架使用User_Update存储过程，但它缺少where子句，这就是为什么更新影响的所有行。

`User_Update`
-- Id: '6' (Type = Int32, IsNullable = false)
-- Username: 'test123' (Type = String, IsNullable = false, Size = 7)
-- Password: 'vZxTTTgLiQUxwchySt1e1o/I9XMWm4QW5pO6MpPGI0o=' (Type = String, IsNullable = false, Size = 44)
-- Email: 'test1@gmail.com' (Type = String, IsNullable = false, Size = 15)
-- FullName: 'test1' (Type = String, IsNullable = false, Size = 5)
-- CreatedAt: 'null' (Type = DateTime, IsNullable = false)
-- UpdatedAt: 'null' (Type = DateTime, IsNullable = false)
-- RoleId: '2' (Type = Int32, IsNullable = false)
-- Executing asynchronously at 
-- Completed in 9 ms with result: 6

更新：增加了执行SaveAsync的SaveCommand

        private async void SaveCommandExecute(object obj)
    {
        //var passwords = (Tuple<string, string>) obj;
        //var password = passwords.Item1;
        //var confirmPassword = passwords.Item2;

        var result = await DialogHelper.ShowAsync("Are you sure you want to continue?", "Confirmation",
            MessageDialogType.YesNo);

        if (result)
        {
            await UserWrapper.ValidateAll();

            if (!UserWrapper.HasErrors)
            {

                if (UserWrapper.Id == 0)
                {
                    UserWrapper.Password = DbHelper.CalculateHash(UserWrapper.FakePassword, UserWrapper.Username);
                }

                await _userRepository.SaveAsync(UserWrapper.Model);
                HasChanges = false;
                Id = UserWrapper.Id;
                SetTitle();
                ((DelegateCommand<object>)SaveCommand).RaiseCanExecuteChanged();


                await LoadAsync(UserWrapper.Id);
            }

        }

    }

现在我的问题，我怎么会告诉EF添加记录id在where子句中？

PS：这个逻辑是工作完全正常的SQL Server实体框架。我不知道为什么它不能在MySQL中EF工作。

我还追踪是否有到库/电流的DbContext任何变化，如果有任何更改，并没有错误，我会启用保存按钮/ save命令。