Enum DbError 

pub enum DbError {
    QueryError(String),
    ConnectionError(String),
    ConnectionRefused(String),
    ConnectionTimeout(String),
    PoolError(PoolError),
    CacheError(CacheError),
    TxError(TxError),
    MigrationError(String),
    Unsupported(String),
    ConfigError(String),
    SerdeError(String),
    NotFound(String),
    AlreadyExists(String),
    ConstraintViolation(String),
    NullValue(String),
    InvalidInput(String),
    Internal(String),
    IoError(String),
    Hook(String),
    TenantError(String),
    Validation(String),
}

数据库错误类型

Variants

QueryError(String)

查询执行失败

ConnectionError(String)

连接失败

ConnectionRefused(String)

连接被拒绝

ConnectionTimeout(String)

连接超时

PoolError(PoolError)

连接池错误

CacheError(CacheError)

缓存错误

TxError(TxError)

事务错误

MigrationError(String)

迁移错误

Unsupported(String)

方言不支持

ConfigError(String)

配置错误

SerdeError(String)

序列化/反序列化错误

NotFound(String)

未找到

AlreadyExists(String)

已存在

ConstraintViolation(String)

约束冲突

NullValue(String)

非空字段出现 null 值

InvalidInput(String)

输入非法

Internal(String)

内部错误

IoError(String)

IO 错误

Hook(String)

钩子执行失败

TenantError(String)

多租户错误（如租户 ID 缺失、跨租户访问）

Validation(String)

数据验证失败（业务规则校验未通过，由 before_validate 钩子触发）

Implementations

impl DbError

pub fn query(s: impl Into<String>) -> Self

新建查询错误

pub fn connection(s: impl Into<String>) -> Self

新建连接错误

pub fn not_found(s: impl Into<String>) -> Self

新建未找到错误

pub fn is_retryable(&self) -> bool

该错误是否可重试

pub fn error_code(&self) -> &'static str

获取错误码（用于日志/监控）

Trait Implementations

impl Debug for DbError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for DbError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for DbError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<DbError> for LockError

fn from(e: DbError) -> Self

Converts to this type from the input type.

impl From<Error> for DbError

fn from(err: Error) -> Self

Converts to this type from the input type.

impl From<Error> for DbError

fn from(err: Error) -> Self

Converts to this type from the input type.

impl From<FromUtf8Error> for DbError

fn from(err: FromUtf8Error) -> Self

Converts to this type from the input type.

impl<T> From<PoisonError<T>> for DbError

fn from(err: PoisonError<T>) -> Self

Converts to this type from the input type.

impl From<TryFromIntError> for DbError

fn from(err: TryFromIntError) -> Self

Converts to this type from the input type.