Enum DbError 

#[non_exhaustive]
pub enum DbError {
    Sqlx(Error),
    Build(String),
    BackendDisabled(Dialect),
    NoBackend,
    BadUrl,
    LockTimeout {
        waited_secs: u64,
    },
}

A database error. Its text may contain SQL or driver details: it is for logs only; handlers turn it into a generic internal answer (AppError).

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Sqlx(Error)

An error from sqlx (connection, query, decoding).

Build(String)

A sea-query statement could not be built.

BackendDisabled(Dialect)

The URL names a backend whose feature is not compiled in.

NoBackend

No backend is compiled in at all.

BadUrl

The URL is empty or its scheme is not recognised.

LockTimeout

Another process holds the migrations lock of this database.

Fields

waited_secs: u64

How long it waited.

Implementations

impl DbError

pub fn describe(&self) -> String

A one-line description for operators: for a database error the server’s message and code (SQLSTATE / MySQL error number), without the driver’s decorations.

pub fn is_unique_violation(&self) -> bool

Whether this is a unique-constraint violation (e.g. a duplicate email), on every backend.

pub fn is_foreign_key_violation(&self) -> bool

Whether this is a foreign-key violation, on every backend.

pub fn is_retryable(&self) -> bool

Whether the database aborted the transaction to resolve a conflict between concurrent transactions, so that running the whole transaction again may succeed: a deadlock (MySQL error 1213, SQLSTATE 40001; PostgreSQL 40P01), a serialization failure (PostgreSQL 40001) or a busy / locked SQLite database. A lock-wait timeout (MySQL 1205) is not retryable (another wait would only add to it).

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, __formatter: &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 Error

fn from(source: DbError) -> Self

Converts to this type from the input type.

impl From<DbError> for AppError

fn from(error: DbError) -> Self

Converts to this type from the input type.

impl From<Error> for DbError

fn from(source: Error) -> Self

Converts to this type from the input type.