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DbError

Enum DbError 

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pub enum DbError {
    Connection(String),
    Query(String),
    Transaction(String),
    Pool(String),
    Config(String),
    Migration(String),
    Validation(String),
    Io(Error),
    Serialization(Error),
}
Expand description

数据库模块错误类型

定义了数据库操作中可能出现的所有错误类型。 每种错误类型都包含详细的错误信息。

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Connection(String)

数据库连接错误

当无法建立数据库连接时发生,可能的原因包括:

  • 网络问题
  • 认证失败
  • 数据库服务未启动
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Query(String)

数据库查询错误

执行 SQL 查询时发生的错误,可能的原因包括:

  • SQL 语法错误
  • 表或字段不存在
  • 数据类型不匹配
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Transaction(String)

数据库事务错误

在事务处理过程中发生的错误,例如:

  • 事务提交失败
  • 事务回滚失败
  • 事务超时
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Pool(String)

数据库连接池错误

连接池管理相关的错误,例如:

  • 连接池已满
  • 无法创建新连接
  • 连接获取超时
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Config(String)

数据库配置错误

配置相关的错误,例如:

  • 配置参数无效
  • 必要配置缺失
  • 配置格式错误
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Migration(String)

数据库迁移错误

数据库架构迁移过程中的错误,例如:

  • 迁移脚本执行失败
  • 版本冲突
  • 回滚失败
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Validation(String)

数据库验证错误

数据验证相关的错误,例如:

  • 字段值不符合约束条件
  • 数据完整性检查失败
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Io(Error)

IO 错误

文件操作相关的错误

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Serialization(Error)

序列化错误

JSON 数据序列化/反序列化过程中的错误

Trait Implementations§

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impl Debug for DbError

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

Formats the value using the given formatter. Read more
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impl Display for DbError

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

Formats the value using the given formatter. Read more
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impl Error for DbError

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

Returns the lower-level source of this error, if any. Read more
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fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

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

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

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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. Read more
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impl From<Error> for DbError

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fn from(source: Error) -> Self

Converts to this type from the input type.
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impl From<Error> for DbError

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fn from(source: Error) -> Self

Converts to this type from the input type.

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> ErasedDestructor for T
where T: 'static,

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToString for T
where T: Display + ?Sized,

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fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more