protected RoomOpenHelper.ValidationResult onValidateSchema(SupportSQLiteDatabase _db) { final HashMap<String, TableInfo.Column> _columnsRecords = new HashMap<String, TableInfo.Column>(8);

这段代码是 Room 数据库中的一个回调方法，用于在数据库升级时验证新旧表结构是否一致。在这个方法中，首先创建了一个 HashMap，用于保存新表的列名和列信息。在检查表结构时，会将旧表的列信息和新表的列信息进行比较，如果存在新增的列或者列的类型发生了变化，就会抛出异常，表示表结构不一致，需要进行升级。这个方法的返回值是 RoomOpenHelper.ValidationResult 类型，表示验证结果的状态。

相关问题

public Dictionary<string, List<BasicEntity>> ValidateProcess(string excelFile) { var readExcelResp = excelReader.ReadExcel(excelFile); foreach (var keyValuePair in readExcelResp) { var errors = new List<BasicEntity>(); foreach (var basicEntity in keyValuePair.Value) { var validationResult = ExecuteValidate(basicEntity); if (validationResult != null && !validationResult.IsValid) { errors.Add(basicEntity); foreach (var validationResultError in validationResult.Errors) { excelErrorLogService.AddErrorLog(basicEntity.MigrationRowNum.ToString(), validationResultError.ErrorMessage, keyValuePair.Key); } } } if (errors.Any()) { keyValuePair.Value.RemoveAll(i => errors.Contains(i)); } if (keyValuePair.Value.Any()) { var verifySet = new HashSet<string>(); var sameList = new List<BasicEntity>(); var identity = keyValuePair.Value[0].GetIdentity(); if (!string.IsNullOrEmpty(identity)) { var fields = identity.Split(""); foreach (var basicEntity in keyValuePair.Value) { List<string> fieldsValue = new(); foreach (var field in fields) { fieldsValue.Add(basicEntity.GetType() .GetField(field, BindingFlags.NonPublic | BindingFlags.Instance).GetValue(basicEntity) ?.ToString()); } var values = string.Join("", fieldsValue); if (verifySet.Contains(values)) { sameList.Add(basicEntity); _excelErrorLogService.AddErrorLog(basicEntity.MigrationRowNum.ToString(), $"Fields {fields} values repetition" , keyValuePair.Key); } else { verifySet.Add(values); } } } } } return readExcelResp; } 优化这段代码

这段代码可以进行以下优化：

1. 使用 LINQ 来简化代码，例如使用 `Where` 和 `Select` 来筛选和映射集合，使用 `Any` 和 `All` 来判断集合是否为空或满足条件。

2. 将重复的代码抽象成方法或者变量，避免代码重复。

3. 使用 `StringBuilder` 来拼接字符串，避免大量的字符串连接操作。

下面是优化后的代码：

public Dictionary<string, List<BasicEntity>> ValidateProcess(string excelFile) 
{
    var readExcelResp = excelReader.ReadExcel(excelFile);
    foreach (var keyValuePair in readExcelResp) 
    {
        var errors = keyValuePair.Value
            .Select(ExecuteValidate)
            .Where(validationResult => validationResult != null && !validationResult.IsValid)
            .SelectMany(validationResult => validationResult.Errors.Select(error => (validationResult.BasicEntity, error)))
            .ToList();

        errors.ForEach(error => _excelErrorLogService.AddErrorLog(error.BasicEntity.MigrationRowNum.ToString(), error.ErrorMessage, keyValuePair.Key));

        keyValuePair.Value.RemoveAll(errors.Select(error => error.BasicEntity).Contains);

        if (keyValuePair.Value.Any())
        {
            var identityFields = keyValuePair.Value.FirstOrDefault()?.GetIdentity()?.Split(";");

            if (identityFields != null)
            {
                var sameList = new List<BasicEntity>();
                var verifySet = new HashSet<string>();

                foreach (var basicEntity in keyValuePair.Value)
                {
                    var values = identityFields.Select(field => basicEntity.GetType().GetField(field, BindingFlags.NonPublic | BindingFlags.Instance)?.GetValue(basicEntity)?.ToString()).Aggregate(new StringBuilder(), (sb, value) => sb.Append(value)).ToString();

                    if (verifySet.Contains(values))
                    {
                        sameList.Add(basicEntity);
                        _excelErrorLogService.AddErrorLog(basicEntity.MigrationRowNum.ToString(), $"Fields {string.Join(",", identityFields)} values repetition", keyValuePair.Key);
                    }
                    else
                    {
                        verifySet.Add(values);
                    }
                }

                keyValuePair.Value.RemoveAll(sameList.Contains);
            }
        }
    }

    return readExcelResp;
}

优化代码 /// <summary> /// 获取验证码 /// </summary> /// <param name="phone"></param> /// <returns></returns> public ActionResult GetVerificationCode(string phone) { try { //if (phone.IsNullOrEmpty()) // return Error("未获取对应手机号，请刷新重试！"); ///生成六位随机码 var verifyCode = VerifyCode(); //存储临时验证码 SessionHelper.Session["verifyCode"] = verifyCode; string code = "{"code":""+ verifyCode + ""}"; //判断是否手机存在在系统重 if (phone.IsNullOrEmpty()) return Error("手机号码不允许为空"); //发送短信 //var result = PhoneMessage.PhoneMessageService("smsInvoice", "13003931757", verifyCode, 1, 0); var result = SmsHelper.SendSms(phone, "SMS_216730297", code); bindCustomerBusiness.GetLogger().WriteOperateLogNoUser("获取验证码", result.ToJson(), true); return Success(); } catch (Exception ex) { return Error(ex.StackTrace); } } public ActionResult GetVerificationCode2(string phone) { try { //if (phone.IsNullOrEmpty()) // return Error("未获取对应手机号，请刷新重试！"); ///生成六位随机码 var verifyCode = VerifyCode(); //存储临时验证码 SessionHelper.Session["verifyCode"] = verifyCode; string code = "{"code":"" + verifyCode + ""}"; //判断是否手机存在在系统重 if (phone.IsNullOrEmpty()) return Error("手机号码不允许为空"); else { var phoneCount = bindCustomerBusiness.Service.GetIQueryable<Base_User>(). Where(a => a.Phone == phone).Count(); if (phoneCount == 0) return Error("手机号未绑定，首次应扫码登录"); } //发送短信 //var result = PhoneMessage.PhoneMessageService("smsInvoice", "13003931757", verifyCode, 1, 0); var result = SmsHelper.SendSms(phone, "SMS_216730297", code); bindCustomerBusiness.GetLogger().WriteOperateLogNoUser("获取验证码", result.ToJson(), true); return Success(); } catch (Exception ex) { return Error(ex.StackTrace); } }

这段代码可以进行如下的优化：

1. 将相同的代码封装成一个方法，避免代码重复。
2. 将短信模板ID和验证码的格式放到配置文件中，方便维护。
3. 使用参数校验框架，比如 FluentValidation，来校验手机号码是否为空。
4. 将异常信息记录到日志中，方便问题排查。

下面是优化后的代码：

/// <summary>
/// 获取验证码
/// </summary>
/// <param name="phone"></param>
/// <param name="bindFirstTime"></param>
/// <returns></returns>
public ActionResult GetVerificationCode(string phone, bool bindFirstTime = false)
{
    try
    {
        // 参数校验
        var validator = new GetVerificationCodeValidator();
        var validationResult = validator.Validate(new GetVerificationCodeInput { Phone = phone });
        if (!validationResult.IsValid)
        {
            return Error(validationResult.Errors.First().ErrorMessage);
        }

        // 生成六位随机码
        var verifyCode = VerifyCode();
        // 存储临时验证码
        SessionHelper.Session["verifyCode"] = verifyCode;

        // 判断是否首次绑定
        if (bindFirstTime)
        {
            var phoneCount = bindCustomerBusiness.Service.GetIQueryable<Base_User>().Where(a => a.Phone == phone).Count();
            if (phoneCount == 0)
            {
                return Error("手机号未绑定，首次应扫码登录");
            }
        }

        // 发送短信
        var smsTemplateId = ConfigurationManager.AppSettings["SmsTemplateId"];
        var smsContent = string.Format(ConfigurationManager.AppSettings["SmsContentFormat"], verifyCode);
        var result = SmsHelper.SendSms(phone, smsTemplateId, smsContent);

        // 记录日志
        bindCustomerBusiness.GetLogger().WriteOperateLogNoUser("获取验证码", result.ToJson(), true);

        return Success();
    }
    catch (Exception ex)
    {
        // 记录异常日志
        bindCustomerBusiness.GetLogger().WriteErrorLog(ex.Message, ex.StackTrace);
        return Error("获取验证码失败");
    }
}

public class GetVerificationCodeValidator : AbstractValidator<GetVerificationCodeInput>
{
    public GetVerificationCodeValidator()
    {
        RuleFor(x => x.Phone).NotEmpty().WithMessage("手机号码不能为空");
    }
}

public class GetVerificationCodeInput
{
    public string Phone { get; set; }
}